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Sludge from paper mill effluent treatment as raw material to produce carbon adsorbents: An alternative waste management strategy
- Source :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2017
- Publisher :
- Elsevier, 2017.
-
Abstract
- Pulp and paper industry produces massive amounts of sludge from wastewater treatment, which constitute an enormous environmental challenge. A possible management option is the conversion of sludge into carbon-based adsorbents to be applied in water remediation. For such utilization it is important to investigate if sludge is a consistent raw material originating reproducible final materials (either over time or from different manufacturing processes), which is the main goal of this work. For that purpose, different primary (PS) and biological sludge (BS) batches from two factories with different operation modes were sampled and subjected to pyrolysis (P materials) and to pyrolysis followed by acid washing (PW materials). All the materials were characterized by proximate analysis, total organic carbon (TOC) and inorganic carbon (IC), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and N2 adsorption isotherms (specific surface area (SBET)and porosity determination). Sludge from the two factories proved to have distinct physicochemical properties, mainly in what concerns IC. After pyrolysis, the washing step was essential to reduce IC and to considerably increase SBET, yet with high impact in the final production yield. Among the materials here produced, PW materials from PS were those having the highest SBET values (387-488 m2 g-1). Overall, it was found that precursors from different factories might originate final materials with distinct characteristics, being essential to take into account this source of variability when considering paper mill sludge as a raw material. Nevertheless, for PS, low variability was found between batches, which points out to the reliability of such residues to be used as precursors of carbon adsorbents. L'Oreal Portugal published
- Subjects :
- Paper
Environmental Engineering
Circular economy
Groundwater remediation
Carbon materials
Industrial Waste
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
Management, Monitoring, Policy and Law
Raw material
Environment
Waste Disposal, Fluid
01 natural sciences
12. Responsible consumption
Adsorption
Waste Management and Disposal
Effluent
0105 earth and related environmental sciences
Sewage
Waste management
business.industry
Alternative adsorbents
Reproducibility of Results
Paper mill
General Medicine
021001 nanoscience & nanotechnology
Waste valorization
Carbon
6. Clean water
chemistry
Environmental science
Sewage treatment
0210 nano-technology
business
Porosity
Pyrolysis
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Accession number :
- edsair.doi.dedup.....c9857ad2cecb4f1199dc64d5c7b29e86