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Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Activated carbon is mainly an adsorbent material and for its versatile application in material science, it's received much attention in recent years. Activated carbon can be prepared using different methods such as physical or chemical activation or physicochemical activation. As a precursor Paper Mill Sludge was used to prepare activated carbon by direct chemical activation where H 3 PO 4 was used as an activating agent. Among different activation temperatures (200 °C, 250 °C, 300 °C, 350 °C, and 400 °C), high yield (49.2%) and iodine number (761.4 mg/g) were obtained at 250 °C with 30 min activation time. The decrease in iodine number and yield of activated carbon was observed with increasing temperature due to activation burn off at higher temperature. A higher iodine number indicates higher activation. The obtained product was characterized by using XRD, FTIR, and EDAX-SEM. FTIR indicates the presence of several aliphatic and aromatic carbons and XRD showed the presence of amorphous structure at the produced activated carbon. SEM showed an irregular and highly rough surface of activated carbon. All the studies of characterization reveal that paper mill sludge has been converted into activated carbon successfully. The novelty of this work is that activated carbon can be produced from paper mill sludge by direct chemical activation with less time and energy consumption. The textural properties and potential applications of obtained activated carbon will be done in our future research works. [ABSTRACT FROM AUTHOR]

The main purpose of this study is to optimize the applicability of TiO2 nanoparticles for paper mill and pulp wastewater treatment under solar irradiation using response surface methodology, provided by the software package DOE. The principle independent parameters were TiO2 loading, pH, time and H2O2 concentration, and COD removal efficiency was chosen as desire response. To evaluate the influence of the parameters on the outputs, the quadratic formulation was applied and for determining the validation of developed models analysis of variance was utilized. The results represented the greatest COD removal was achieved 82%, approximately at pH of 8.1, TiO2 fraction of 0.83 g/L, H2O2 concentration of 2.4 ml/L and the contact time of 196 min. [ABSTRACT FROM AUTHOR]

Nguyen, O. T. H., Aksenov, I., Phan, N. T., & Sakulyeva, T. (2021). Russia's foreign policy priorities in the Asia‐Pacific region. Journal of Public Affairs, e2745. https://doi.org/10.1002/pa.2745. The above article, published online on 17 August 2021 in Wiley Online Library (wileyonlinelibrary.com) has been retracted by agreement between the journal's Editor‐in‐Chief, Laura Corazza and Shaista Wasiuzzaman and John Wiley & Sons Ltd. The retraction has been agreed following concerns regarding manipulation of the peer review and publishing process. Concerns were originally raised by a third party (1). Further investigation by the publisher has found manipulation of the peer review process, and overlapping text with other publications. The retraction has been agreed because the peer review of the article was compromised and there is unattributed overlap between this article and several other articles (2)(3). Abalkina, A. (2022). Publication and collaboration anomalies in academic papers originating from a paper mill: evidence from a Russia‐based paper mill https://arxiv.org/abs/2112.13322 Burdzik, T. (2019). Slowly but Surely: Russia's Foreign Policy in Southeast Asia https://russiancouncil.ru/en/analytics‐and‐comments/columns/asian‐kaleidoscope/slowly‐but‐surely‐russia‐s‐foreign‐policy‐in‐southeast‐asia/?sphrase%5fid=34631795 Rumer, E., Sokolsky, R., Vladicic, A. (2020). Russia in the Asia‐Pacific: Less Than Meets the Eye https://carnegieendowment.org/publications/82614 [ABSTRACT FROM AUTHOR]

Eight fungal strains (F1–F8) isolate from the sediment core and degraded wood of the Pulp and Paper Mill effluent and Phanerochaete chrysosporium are tested for different cellulolytic (CMcase, FPase, Xylanases) and lignolytic (lignin peroxidase) enzyme activity in pulp. F‐3 (Cryptococcus neoformans) strain shows higher enzyme activity compare to other fungi isolated from effluent. Weight loss, cellulose loss, and organic carbon contents are found maximum in F‐3 (C. neoformans) strain. Reducing sugar, protein content, and color removing potential are also higher in C. neoformans. The culture extract of F‐3 strain grows in presence of pulp fractionated into five protein fractions has indicated two fractions of molecular weight, 38,000 and 40,000 Da, having lignin peroxidase activity. Lignin peroxidase has optimum activity at pH 2–3 and temperature 20–30 °C, maximum activity at 6–48 mM veratryl alcohol concentration and 256 mM H2O2, however, sodium azide inhibits the enzyme activity. Different metals (CoCl2, HgSO4, CaCl2, SnCl2, FeSO4, CuSO4, and ZnSO4) also affect the lignin peroxidase activity. Characterization study is performed for significant analysis. [ABSTRACT FROM AUTHOR]

Background: Workers in pulp and paper factories are continuously exposed to paper dust. Excessive exposure to paper dust can cause respiratory disease. Information about the prevalence of chronic respiratory symptoms and dust exposure levels among workers in pulp and paper factories is not available in Ethiopia. The aim of this study was, therefore, to assess personal total dust exposure levels, the prevalence of chronic respiratory symptoms and their associated risk factors among workers in Ethiopian pulp and paper factories. Methods: A comparative cross-sectional study was conducted. A total of 40 dust measurements were carried out on 20 randomly selected workers. To assess chronic respiratory symptoms and associated factors, 434 workers from two paper factories and controls were interviewed using a standard questionnaire adapted from the American Thoracic Society (ATS). Gravimetric analyses of the filters were undertaken using a standard microbalance. Poisson regression was performed for comparing the prevalence of symptoms and risk factors for the two groups. Multivariable analyses were conducted to identify factors associated with chronic respiratory symptoms. Result: The arithmetic mean (AM) and geometric mean (GM) of dust exposure levels among the paper factories workers were 11.3 (± 7.7) and 10.2 (± 1.4) mg/m3 respectively. This exposure level exceeded the threshold limit value recommended for total dust (10 mg/m3). The prevalence of having at least one chronic respiratory symptom was about 51% among the workers in paper factories. The prevalence ratio of having chronic respiratory symptoms among paper factory workers was 5.6 times higher (PR = 6, 95% CI 3.5–10.3) than in the controls. Chronic respiratory symptoms were significantly associated with factors such as an educational status of less than grade 9, being employed in the work sections of the factories, having work experience of 5 years and above, working more than 8 h per day and having a past history of occupation and respiratory illnesses. Conclusion: The dust concentration in the paper factories exceeded the acceptable recommended limit value of 10 mg/m3. The prevalence of chronic respiratory symptoms among paper factory workers was higher than among controls. The main determining factors for chronic respiratory symptoms among the workers were the specific work section such as production section, low income, having past history of respiratory illnesses, the number of years of working and low educational status. This finding indicated the need for improving the working conditions in paper factories in Ethiopia. [ABSTRACT FROM AUTHOR]

To fully utilize secondary resources, it will inevitably generate a large amount of deinking sludge using waste paper as raw material for paper making. The sludge contains small fibers and dissolved substances of various chemicals. After adding flocculant and settling treatment, deinked sludge is formed. However, its organic matter content can reach a high level of 40% to 50%, and it can also be reused, effectively avoiding the harmful impact of papermaking sludge on the environment. [ABSTRACT FROM AUTHOR]

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)