22 results on '"George, Lartey Young"'
Search Results
2. Parametric modelling and analysis to optimize adsorption of Atrazine by MgO/Fe3O4-synthesized porous carbons in water environment
- Author
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George, Lartey-Young, Ma, Limin, Zhang, Weiwei, and Yao, Guodong
- Published
- 2023
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3. Towards adequate policy enhancement: An AI-driven decision tree model for efficient recognition and classification of EPA status via multi-emission parameters
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Adeboye Awomuti, Philip Kofi Alimo, George Lartey-Young, Stephen Agyeman, Tosin Yinka Akintunde, Adebobola Ololade Agbeja, Olayinka Oderinde, Oluwarotimi Williams Samuel, and Henry Otobrise
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Decision tree ,Artificial intelligence ,EPA status ,Air emission parameters ,Machine learning ,Emission reduction ,Environmental sciences ,GE1-350 ,Urban groups. The city. Urban sociology ,HT101-395 - Abstract
Accurate and timely evaluation and assessment of emission data and its impact on environmental status has been a key challenge due to the conventional manual approach utilized for independently computing most emission parameters. To resolve this long-standing issue, we proposed an Artificial Intelligence (AI)-driven Decision Tree model to adequately classify Environmental Protection Agency (EPA) status based on multiple Emission Parameters. The model's performance was systematically evaluated using multiple emission parameters obtained from a two-stroke motorcycle dataset collected in Nigeria across various metrics such as K-S Statistics, Confusion Matrix, Correlation Heat Map, Decision Tree, Validation Curve, and Threshold Plot. The K-S Statistics plot's experimental results showed a considerable correlation between HC, CO, and the target variable, with values ranging from 0.75 to 0.80. At the same time, CO2 and O2 do not correlate with the target variable with values between 0.00 and 0.09. The Confusion Matrix revealed that the proposed model has an overall accuracy of 99.9% with 481 true positive predictions and 75 true negative predictions, indicating the effectiveness of the proposed AI-driven model. In conclusion, our proposed AI-driven model can effectively classify EPA status based on multiple emission parameters with high accuracy, which may spur positive advancement in policy enhancement for proper environmental management.
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- 2023
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4. Risk assessment and source apportionment of heavy metalloids from typical farmlands provinces in China
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Tholley, Mabinty Sarah, George, Lartey Young, Wang, Gehui, Ullah, Sajid, Qiao, Zhihua, Ling, Siyuan, Wu, Jinhong, Peng, Cheng, and Zhang, Wei
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- 2023
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5. Biodegradation of cefalexin by two bacteria strains from sewage sludge
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Jichen Tian, Chong Chen, George Lartey-Young, and Limin Ma
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antibiotic pollution ,cefalexin ,biodegradation ,degradation mechanism ,Science - Abstract
Bioremediation has been used as an environmentally-friendly, energy-saving and efficient method for removing pollutants. However, there have been very few studies focusing on the specific antibiotic-degrading microorganisms in the activated sludge and their degradation mechanism. Two strains of cefalexin-degrading bacteria (Rhizobium sp. (CLX-2) and Klebsiella sp. (CLX-3)) were isolated from the activated sludge in this study. They were capable of rapidly eliminating over 99% of cefalexin at an initial concentration of 10 mg l−1 within 12 h. The exponential phase of cefalexin degradation happened a little earlier than that of bacterial growth. The first-order kinetic model could elucidate the biodegradation process of cefalexin. The optimized environmental temperature and pH values for rapid biodegradation by these two strains were found to be 30°C and 6.5–7, respectively. Furthermore, two major biodegradation metabolites of CLX-3, 7-amino-3-cephem-4-carboxylic acid and 2-hydroxy-3-phenyl pyrazine were identified using UHPLC-MS and the biodegradation pathway of cefalexin was proposed. Overall, the results showed that Rhizobium sp. (CLX-2) and Klebsiella sp. (CLX-3) could possibly be useful resources for antibiotic pollution remediation.
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- 2023
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6. Application of Response Surface Methodology to Optimize Coagulation Treatment Process of Urban Drinking Water Using Polyaluminium Chloride
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Mohamed Yateh, George Lartey-Young, Fengting Li, Mei Li, and Yulin Tang
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coagulation optimization ,polyaluminium chloride ,response surface methodology ,urban drinking water ,Yangtze River ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Many coagulants such as aluminium sulfate, ferric sulfate, and ferrous sulfate have been investigated in the past, but there is a lack of data on their effectiveness to some specific water quality parameters. This study aimed at investigating the efficiency of the coagulation water treatment process to remove pollutants such as total organic carbon (TOC), total nitrogen (TN), and total suspended solids (TSS) from urban drinking water. The polyaluminium chloride (PAC) coagulant was applied to determine the impact of the treatment process on the structure and diversity of these pollutants in urban drinking water. All water samples were collected from the Yangtze River, Baoshan district, Shanghai, China, over a period of three months which coincided with the late summer and early winter periods. Specific to different coagulant characterizations, a preliminary test was performed with three other coagulants, namely, aluminium sulfate, polyaluminium, silicate sulfate, and ferric sulfate to determine their optimal conditions for floc characterization and removal efficiencies. In summary, the overall performance of the PAC coagulant was better than that of the other three coagulants used in the pre-treatment of the sampled water. The obtained results revealed that under the optimum operating conditions, the doses of the PAC were as follows: 20, 35, 50, 65, and 80 mgL−1, respectively. The water temperature and pH were determined by using a pH meter, the TOC and TN determined by using a TOC analyzer, and the TSS by following the ASTM D2540 method. Furthermore, the response surface methodology by the Box–Behnken optimization analysis was applied to coagulant dosage, temperature, pH, and three corresponding dependent factors (TSS, TOC, and TN) to determine the best optimal conditions for the PAC performance. To determine whether or not the quadratic model adequately explained and predicted the response during the coagulation process, an analysis of variance was performed. Multiple optimal factors were identified for the urban drinking water treatment, including a pH value of 6.9, water temperature of 20.1 °C, and a coagulant dosage of 9.7 mgL−1.
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- 2023
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7. Occurrence, spatial distribution, and risk assessment of brominated flame retardants in farmland soils of typical provinces in China
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Tholley, Mabinty Sarah, primary, George, Lartey Young, additional, Fu, Mengru, additional, Qiao, Zhihua, additional, Wang, Gehui, additional, Ling, Siyuan, additional, Peng, Cheng, additional, Zhang, Wei, additional, Ye, Chunmei, additional, Liu, Fang, additional, and Yang, Jie, additional
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- 2023
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8. Impact and Health Risk Assessment of Groundwater in the Vicinity of Dumpsites in Keffi Metropolis, Nigeria
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Donuma, Kyari Umar, primary, Ma, Limin, additional, Bu, Chengcheng, additional, and George, Lartey-Young, additional
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- 2023
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9. Remediation with Semicoke-Preparation, Characterization, and Adsorption Application
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George Lartey-Young and Limin Ma
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adsorption ,activation ,contaminant ,regeneration ,semi-coke ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Development of low-cost contaminant sorbents from industrial waste is now an essential aspect of the circular economy since their disposal continues to threaten ecological integrity. Semicoke (SC), a by-product generated in large quantities and described as solid waste from gasification of low-rank coal (LRC), is gaining popularity in line with its reuse capacity in the energy industry but is less explored as a contaminant adsorbent despite its physical and elemental carbon properties. This paper summarizes recent information on SC, sources and production, adsorption mechanism of polluting contaminants, and summarizes regeneration methods capable of yielding sustainability for the material reuse.
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- 2020
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10. Photodegradation of pesticides using compound-specific isotope analysis (CSIA): a review
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Guolu Cui, Chong Chen, Limin Ma, and George Lartey-Young
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Pollutant ,Reaction conditions ,Compound specific ,General Chemical Engineering ,010401 analytical chemistry ,Environmental media ,General Chemistry ,010501 environmental sciences ,Pesticide ,01 natural sciences ,0104 chemical sciences ,Environmental chemistry ,Environmental science ,Photochemical degradation ,Photodegradation ,0105 earth and related environmental sciences ,Isotope analysis - Abstract
Pesticides are commonly applied in agriculture to protect crops from pests, weeds, and harmful pathogens. However, chronic, low-level exposure to pesticides can be toxic to humans. Photochemical degradation of pesticides in water, soil, and other environmental media can alter their environmental fate and toxicity. Compound-specific isotope analysis (CSIA) is an advanced diagnostic tool to quantify the degradation of organic pollutants and provide insight into reaction mechanisms without the need to identify transformation products. CSIA allows for the direct quantification of organic degradation, including pesticides. This review summarizes the recent developments observed in photodegradation studies on different categories of pesticides using CSIA technology. Only seven pesticides have been studied using photodegradation, and these studies have mostly occurred in the last five years. Knowledge gaps in the current literature, as well as potential approaches for CSIA technology for pesticide monitoring, are discussed in this review. Furthermore, the CSIA analytical method is challenged by chemical element types, the accuracy of instrument analysis, reaction conditions, and the stability of degradation products. Finally, future research applications and the operability of this method are also discussed.
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- 2021
11. Synthesis of Attaining Sustainable Development Goal 6.5: A Case Study of Mano River
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George Lartey-Young, Fengting Li, Mohamed Yateh, and Harrison Henry Boying
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Sustainable development ,Water resources ,geography ,geography.geographical_feature_category ,Integrative literature review ,Water stress ,Drainage basin ,River management ,Environmental planning ,Socioeconomic status ,Sierra leone - Abstract
The Mano River is a transboundary river that runs through Cote d’Ivoire, Liberia, Guinea, and Sierra Leone. According to a 2018 United Nation report on Sustainable Development Goal (SDG) 6.5, which aims to improve the adoption of cohesive water resource management by 2030; the impact of this goal on the Mano River management is minimal. The research summarizes previous studies using an integrative literature review method, drawing general conclusions and identifying unsolved problems with respect to water resources management. The research finding demonstrated that existing water stress and poor management as exacerbated by socioeconomic practices in the region are the major threats to achieve SDG 6.5. As a result of these activities, long-term management of the river basins has become extremely difficult. The research informs a discussion to achieve cooperative water resource management, which is best achieved by shared collaboration and shared interests as described by SDG 6.5.
- Published
- 2021
12. Africa's railway renaissance and sustainability: Current knowledge, challenges, and prospects
- Author
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Mouhamed Bayane Bouraima, Philip Kofi Alimo, Stephen Agyeman, Peter Davis Sumo, George Lartey-Young, Daniel Ehebrecht, and Yanjun Qiu
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Geography, Planning and Development ,Transportation ,General Environmental Science - Published
- 2023
13. Parametric modelling and analysis to optimize adsorption of Atrazine by MgO/Fe3O4-synthesized porous carbons in water environment.
- Author
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George, Lartey-Young, Ma, Limin, Zhang, Weiwei, and Yao, Guodong
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ATRAZINE ,FREE energy (Thermodynamics) ,PARAMETRIC modeling ,WATER reuse ,EXOTHERMIC reactions ,ADSORPTION (Chemistry) - Abstract
Background: Pesticide contamination to water, continues to raise ecotoxicological and human concerns. Studying the application of green adsorbents for removing pesticides from water can significantly reduce ecotoxicological impacts and sustain reclamation of water bodies. Results: The current study investigated the adsorption capacity of MgO/Fe
3 O4 modified coconut shell biochar (MCSB) towards Atrazine removal in water. The prepared adsorbents were structurally constricted and obtained relative amount of mesopore spaces filled by nanoparticles which equally provided active occupancy/binding sites for Atrazine molecule deposition. Equilibrium isotherm studies under temperature regimes of 300 K, 318 K and 328 K were best described by the Freundlich isotherm (R2 = 0.95–0.97) with highest adsorption capacity corresponding to the highest temperature range (328 K) at (KF = 9.60 L mg−1 ). The kinetics modelling was best fitted to the pseudo second-order kinetic (R2 = 0.90–0.98) reaction pathways revealing that Atrazine uptake and removal occurred majorly over non-homogenous surfaces and high influence of surface functional groups in the process. Atrazine uptake by the adsorbent were mostly efficient within pH ranges of 2–6. Thermodynamics values of free energy ΔG° were negative ranging (ΔG° = − 27.50 to − 29.77 kJ mol−1 ) across the varying reaction temperature indicating an exothermic reaction, while enthalpy (ΔH°) (34.59 kJ mol) and entropy (ΔS°) (90.88 JK−1 /mol) values were positive revealing a degree of spontaneity which facilitated Atrazine uptake. The adsorbents regeneration capacities over five cycles were observed to decrease proportionally with maximum yields up to 50–60%. Optimization of the adsorption condition by response surface modelling (RSM) and Central Composite Design (CCD) could reveal optimum conditions for Atrazine removal through interaction of different variables at pH = 12, adsorbate initial concentration at 12 mg L−1 , adsorbate dosage at 0.5 g and reaction temperature at 54 °C. The overall mechanisms of the adsorption could be contributed by availability of surface functional groups on the MCSB surface through increase in hydrophilicity facilitating easy Atrazine molecule attachment via hydrogen bonding and improved surface complexation. Conclusions: The as-synthesized MCSB adsorbent could uptake and remove Atrazine in water. A high pH, low concentration, low adsorbent dosage and high reaction temperature could be optimized conditions to attain highest Atrazine removal by the synthesized adsorbent. [ABSTRACT FROM AUTHOR]- Published
- 2023
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14. Occurrence, Spatial Distribution, and Risk Assessment of Brominated Flame Retardants in Farmland Soils of Typical Provinces in China
- Author
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Tholley, Mabinty Sarah, primary, George, Lartey Young, additional, Qiao, Zhihua, additional, Yang, Jie, additional, Ling, Siyuan, additional, Peng, Cheng, additional, Zhang, Wei, additional, Ye, Chunmei, additional, Liu, Fang, additional, and Zhou, Bingsheng, additional
- Published
- 2022
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15. Optimization, equilibrium, adsorption behaviour of Cu/Zn/Fe LDH and LDHBC composites towards atrazine reclamation in an aqueous environment
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George Lartey-Young and Limin Ma
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,Hydrogen-Ion Concentration ,Pollution ,Kinetics ,Zinc ,Charcoal ,Hydroxides ,Environmental Chemistry ,Atrazine ,Adsorption ,Sasa ,Water Pollutants, Chemical - Abstract
Cu-Zn-Fe Layered double hydroxides (LDH) and LDH dispersed on bamboo biochar (LDHBC) was used to study the adsorption of Atrazine by characterizing the adsorption kinetics, isotherms and response surface methodology (RSM) to reveal interactive effects of pH, adsorbent dosage and adsorbate initial concentration towards LDH optimum performance. The estimate of parameters determined for Langmuir isotherm quantities were in the range (21.84-37.91 mg/g) for LDH and (63.64-87.04 mg/g) for LDHBC. Regeneration and reusability after five cycles detected that the adsorption efficiencies of the adsorbents were reduced to 36% for LDH and 66% for LDHBC. Box Behnken design analysis could further reveal optimized conditions for higher Atrazine removal by LDH up to 74.8%. The adsorption mechanisms could be determined by π-π interactions occurring at the interfaces by hydrogen bonding and pore filling effects.
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- 2021
16. Schoolchildren's inland water transport adoption barriers in Tanzania: Health belief model application
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Nyamatari Anselem Tengecha, Philip Kofi Alimo, Stephen Agyeman, Tosin Yinka Akintunde, George Lartey-Young, and Xinyu Zhang
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Geography, Planning and Development ,Transportation ,General Environmental Science - Published
- 2022
17. Investigating the increasing demand and formal regulation of motorcycle taxis in Ghana
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Philip Kofi Alimo, Abdul Basit Abdul Rahim, George Lartey-Young, Daniel Ehebrecht, Ling Wang, and Wanjing Ma
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Geography, Planning and Development ,Transportation ,General Environmental Science - Published
- 2022
18. Hydrochemistry of Surface and Groundwater in the Vicinity of a Mine Waste Rock Dump: Assessing Impact of Acid Rock Drainage (ARD)
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Peter O. Sanful, George Lartey-Young, Francis Krampah, Oscar Dawohoso, and Austin Asare
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geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Environmental engineering ,Drainage basin ,010501 environmental sciences ,01 natural sciences ,Hazardous waste ,Environmental science ,Water quality ,Drainage ,Surface water ,Effluent ,Groundwater ,Environmental quality ,0105 earth and related environmental sciences - Abstract
Acid Rock Drainage (ARD) is a well-known problem related to the mining industry due to its hazardous environmental effects. Metal-rich drainage and acid effluent transmitted from mine waste dumps compromise environmental quality of groundwater and surface water systems destroying aquatic life and increasing human health risks. This study was aimed at assessing the acid and metal drainage potential from the Subriso East Rock Dump (SERD) located in the Wassa East district of Ghana on ground and surface water quality in the catchment using a system of monitoring boreholes, reference boreholes and river samples. Water samples were collected from deep and shallow monitoring boreholes and surface water within the immediate environs of the SERD from August 2012 to February 2013 for laboratory and statistical analysis. Parameters analyzed include sulphate, alkalinity, Arsenic (As), Manganese (Mn), Iron (Fe), Zinc (Zn), Copper (Cu), Cadmium (Cd), Mercury (Hg), Aluminum (Al), Silver (Ag) and lead (Pb) and their concentrations compared with Ghana Standards Authority (GSA) GSB (2009) and WHO (2017) standards. Results indicate that surface and groundwater were not impacted by the SERD possibly because there was no generation of acid or metal-loaded effluent from the SERD into the environment. Physicochemical variables between monitoring boreholes did not differ significantly from conditions in the reference boreholes. Similarly, comparison of upstream and downstream river conditions did not yield any statistical significance (p > 0.05). Mn and Fe concentrations were above the WHO (2017)/GSB (2009) standards. Heavy metal concentrations in surface and groundwater were below detection limits except manganese and iron whose concentrations exceeded the recommended guidelines. No significant environmental impacts exist that could be attributed to the waste rock dump and may be as a result of engineering designs and mechanisms which prevent acid generated water from reaching the external environment. Furthermore, the geology of the study area potentially could be slightly inert having the potential to generate ARD under appropriate conditions. Again, the young age of the waste rock dump is a factor that may contribute to ARD generation under appropriate condition. Routine monitoring of groundwater and surface water sources is required to determine future acid generation of the SERD and its environmental impacts. The results of this study will assist decision makers and environmental managers to plan effectively to mitigate future impacts as mining waste rock dumps are known to increase in acid generation potential with age.
- Published
- 2019
19. Spatial and Temporal Patterns of Variation in Environmental Quality of Water and Sediments of Streams in Mined and Unmined Areas with Emphasis on Mercury (Hg) and Arsenic (As)
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George Lartey-Young, Stephen T. Annan, Peter O. Sanful, and Rebecca K. Yandam
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geography ,geography.geographical_feature_category ,Drainage basin ,chemistry.chemical_element ,Sediment ,Mercury (element) ,Water column ,chemistry ,Environmental chemistry ,Environmental science ,Water quality ,Turbidity ,Surface water ,Arsenic - Abstract
Heavy metal pollution from both anthropogenic and natural processes can have significant effect on environmental quality of stream and river systems. However, in Ghana, heavy metal pollution of waterbodies is attributed mainly to mining activities but the role of natural mechanisms in altering stream water and sediment quality in relation to heavy metals has received little attention. Spatial and temporal variation in water quality parameters and heavy metal concentrations in water and sediments were studied comparatively in a river and two streams in a gold-rich watershed impacted by heavy mining activities. Samples were collected monthly over a twelve-month period from November 2010 to October 2011 from upstream (unmined) and downstream (mined) sections of the studied streams. Parameters measured include temperature, dissolved oxygen, conductivity, pH, turbidity, colour, mercury (Hg) and arsenic. High spatial variability of water quality parameters was found. Hg concentrations in water were extremely low in both upstream and downstream areas. Maximum geochemical background levels of Hg in unmined pristine areas were 2.45 mg/g whilst arsenic was 29.10 mg/g. By contrast, gold-mined downstream areas recorded Hg and arsenic concentrations of 8.75 mg/g and 82.53 mg/g in stream sediments respectively. Levels of Hg and arsenic in sediments were several orders of magnitude greater than concentrations in surface water in downstream sections and this may be explained by substances originating from mining activities, upstream transport or remobilized sedimented materials in the overlying water column. Our study showed that both natural and human activities may contribute to heavy metal pollution in the highly mineralized watershed of the Pra River Basin. Human factors are however likely to amplify the natural background levels of heavy metals.
- Published
- 2018
20. Assessment of groundwater suitability for irrigation in three sub catchments in Upper Athi River Basin, Kenya
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George Lartey Young, Ebenezer Ashun, and Philip Kwabla Attibu
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Hydrology ,Irrigation ,geography ,education.field_of_study ,Soil salinity ,geography.geographical_feature_category ,Population ,Drainage basin ,Salinity ,Environmental science ,Water quality ,education ,Surface irrigation ,Groundwater - Abstract
Over the years, erratic rainfall pattern coupled with increasing population has led to the reliance on groundwater as an alternative and sustainable source for crop irrigation to meet increasing food demand. Irrigation of crops though essential, if not done with care through good practices and use of quality water can lead to soil salinization and ecological unsustainability. This study was carried out to assess the salinity of groundwater used for irrigation in three sub catchments in the Upper Athi River Basin of Kenya. Stratified random sampling technique was used to select representative boreholes and shallow wells for the study. In all, water from 17 boreholes and 17 shallow wells spread across the study area were sampled and analysed for selected physico-chemical properties. Standard methods were used for all the laboratory analysis; temperature, pH and electrical conductivity (EC) of water samples were measured in the field. The results obtained were compared with FAO Water Quality Guidelines for Irrigation. pH ranged from 4.2 to 7.13 indicating weak acidity with about 75% samples falling below lower guideline value. EC values ranged from 467 to 1328 μS/cm which were within FAO and NEMA permissible limits for irrigation purposes. All salts ions were within permissible irrigation water suitability standards except CO3-, Cl and K+. 97% samples had above the recommended carbonate concentrations while 80% had more potassium than the recommended value with the remaining 20% being boreholes. In relation to chloride concentrations, samples from shallow wells are not suitable for sprinkler irrigation since they were above the recommended levels; however, 58% were suitable for surface irrigation. For the boreholes, chloride concentrations were suitable for both surface and sprinkler irrigation. In conclusion, the boreholes had less ions as compared to shallow wells. This research may serve as a preliminary study to provide baseline information that may direct future water quality assessment studies in the study area. Key words: Irrigation, groundwater quality, boreholes, shallow wells, physico-chemical quality, salinity, sodicity.
- Published
- 2017
21. Ameliorative effects of tamarind on the toxicity of Erythrophleum suaveolens in rabbits
- Author
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Ebenezer Ashun, Joy A. Oladimeji-Salami, George Lartey-Young, and John K. M. Appah
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0106 biological sciences ,Traditional medicine ,biology ,Health, Toxicology and Mutagenesis ,Pharmacology toxicology ,food and beverages ,Histology ,Toxicology ,biology.organism_classification ,01 natural sciences ,0104 chemical sciences ,Subchronic toxicity ,010404 medicinal & biomolecular chemistry ,Erythrophleum suaveolens ,parasitic diseases ,Toxicity ,Livestock management ,010606 plant biology & botany - Abstract
The toxicity of Erythrophleum suaveolens in livestock management has precipitated attempts to obtain an efficient anti-toxic treatment. Tamarindus indica used for treating E. suaveolens toxicity in animals was investigated in this study through an acute and a sub chronic toxicity study on rabbits. Histological, hematological features, serum biochemical properties, and clinical observations on the rabbits were evaluated as indices of toxicity. Histology of the vital organs revealed severe pathologies in rabbits administered with the extract E. suaveolens while organs of rabbits treated with T. indica showed moderate and mild pathologies. Enhanced performance of the liver and kidnes, high WBC counts and RBC in the blood was observed in species treated with T. indica. Study showed T. indica’s attenuate effect on E. suaveolens toxicity in rabbits.
- Published
- 2017
22. Assessment of groundwater suitability for irrigation in three sub catchments in Upper Athi River Basin, Kenya
- Author
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Philip, Kwabla Attibu, primary, Ebenezer, Ashun, additional, and George, Lartey Young, additional
- Published
- 2017
- Full Text
- View/download PDF
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