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Effective Elimination of Hazardous Chromium (VI) Using Periodic Elements and Contemporary Adsorption Methods by Using Magnesium Ferrite Nanoparticle: A Review

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Journal of Environmental Protection 2024年第5期15卷 596-619页

作者： Nazmun Nahar Mahabub Hossain Swaron md. aliuzzaman sheik md. Jamal Uddin Department of Soil and Environmental Sciences University of Barishal Barishal Bangladesh

A well-known hazardous metal and top contaminant in wastewater is hexavalent chromium. The two forms of most commonly found chromium are chromate ( CrO 4 2− ) and dichromate ( Cr 2 O 7 2− ). Leather tanning, cooling tower blow-down, plating, electroplating, rinse water sources, anodizing baths etc. are the main sources of Cr (VI) contamination. The Cr (VI) is not only non-biodegradable in the environment but also carcinogenic to living population. It is still difficult to treat Cr contaminated waste water effectively, safely, eco-friendly, and economically. As a result, many techniques have been used to treat Cr (VI)-polluted wastewater, including adsorption, chemical precipitation, coagulation, ion-exchange, and filtration. Among these practices, the most practical method is adsorption for the removal of Cr (VI) from aqueous solutions, which has gained widespread acceptance due to the ease of use and affordability of the equipment and adsorbent. It has been revealed that Fe-based adsorbents’ oxides and hydroxides have high adsorptive potential to lower Cr (VI) content below the advised threshold. Fe-based adsorbents were also discovered to be relatively cheap and toxic-free in Cr (VI) treatment. Fe-based adsorbents are commonly utilized in industry. It has been discovered that nanoparticles of Fe-, Ti-, and Cu-based adsorbents have a better capacity to remove Cr (VI). Cr (VI) was effectively removed from contaminated water using mixed element-based adsorbents (Fe-Mn, Fe-Ti, Fe-Cu, Fe-Zr, Fe-Cu-Y, Fe-Mg, etc.). Initial findings suggest that Cr (VI) removal from wastewater may be accomplished by using magnesium ferrite nanomaterials as an efficient adsorbent.

关键词： Chromium (VI) Periodic Elements Adsorption Elimination Magnesium Ferrite

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Nutrient Dynamics in Recycled Organic Amended Alkaline Soil

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Open Journal of Soil Science 2022年第3期12卷 83-95页

作者： md. aliuzzaman sheik Anjuman Ara Rajonee M. Hasinur Rahman Department of Soil and Environmental Sciences The University of Barishal Barishal 8254 Bangladesh

A variety of wastes are generated due to human activities. Organic waste usage in agriculture plays a significant role in the steady supply of plant nutrients through improving soil quality. An in vitro incubation study was conducted to measure the release of the major nutrients viz. available nitrogen (N), phosphorus (P), and potassium (K) in alkaline soil amended by recycled organic soil conditioners. The soil was amended by compost (Cm) and vermicompost (VC) @5 tha−1 and a mixture of compost and vermicompost (Cm + VC) @2.5 tha−1. Chemical fertilizers (Cf) were added @of 98.842 kg⋅ha−1 of urea and 64.99 kg⋅ha−1 of triple superphosphate (TSP), with amended soils being incubated for 120 days maintaining 50% field moisture holding capacity. Due to the sufficient content of potassium in experimental soil for plant growth, extra potassium was not added. Available soil N, P, and K were determined at every 0, 15, 30, 45, 60, 90, and 120 days of incubation. The highest available N and K release was found in VC treated soils at the incubation period of 45 days. On the other hand, the highest P release was recorded in Cm treated soils at the incubation period of 45 days. In this experiment, the addition of Cm, VC and Cm + VC showed better release of cumulative plant available N, P and K than either control (C) or Cf and were arranged as VC > Cm > Cm + VC > Cf > C, Cm > Cm + VC > VC > Cf > C and Cm + VC > VC > Cm > C > Cf for N, P and K, respectively. The results of this experiment revealed that the addition of compost and/or vermicompost is predominant over chemical fertilizer in supplying of major nutrients for crops in alkaline soil.

关键词： Compost Vermicompost Incubation Study Nitrogen Phosphorus and Potassium

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Coverage of community-wide mass drug administration platforms for soil-transmitted helminths in Benin, India, and Malawi: findings from the DeWorm3 project

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贫困所致传染病(英文) 2024年第5期13卷 16-29页

作者： Means Arianna Rubin ásbj?rnsdóttir Kristjana Hr?nn Sharrock Katherine C. Galagan Sean R. Aruldas Kumudha Avokpaho Euripide Chabi Félicien Halliday Katherine E. Houngbegnon Parfait Israel Gideon John Kaliappan Saravanakumar Puthupalayam Kennedy David Legge Hugo Oswald William E. Palanisamy Gokila Rogers Elliott Timothy Joseph Pearman Emily Ramesh Rohan Michael Simwanza James sheik-Abdullah Jasmine Farzana sheikh Mariyam Togbevi Comlanvi Innocent Witek-McManus Stefan Pullan Rachel L. Bailey Robin Kalua Khumbo Ibikounlé Moudachirou Luty Adrian J. F. Ajjampur Sitara S. R. Walson Judd L. Department of Global Health University of Washington Seattle Washington USA The DeWormProject University of Washington Seattle Washington USA Centre of Public Health Sciences University of Iceland Reykjavík Iceland The Wellcome Trust Research Laboratory Division of Gastrointestinal Sciences Christian Medical College Vellore India Institut de Recherche Clinique du Bénin Abomey-Calavi Bénin Department of Disease Control Faculty of Infectious and Tropical Diseases London School of Hygiene &amp Tropical Medicine London UK Global Health Division International Development Group Research Triangle Institute (RTI) International Research Triangle Park NC USA Division of Medicine University College London London UK Blantyre Institute for Community Outreach Lions Sight First Eye Hospital Blantyre Malawi Department of Population Health Faculty of Epidemiology and Population Health London School of Hygiene &amp Clinical Research Department Faculty of Infectious and Tropical Diseases London School of Hygiene &amp School of Population and Public Health University of British Columbia Vancouver British Columbia Canada Tropical Infectious Diseases Research Center (TIDRC)Université d’Abomey-Calavi Abomey-Calavi Bénin Université Paris Cité Institut de Recherche pour le Développement MERIT Paris F-75006 France Department of International Health Bloomberg School of Public Health Johns Hopkins University Baltimore MD USA

Background Soil-transmitted helminths (STH) affect approximately 1.5 billion people globally. The current STH control strategy is annual or twice-annual preventive chemotherapy, typically school-based deworming targeting children and women of reproductive age. Mathematical modeling suggests that it may be possible to interrupt STH transmission through high-coverage community-wide mass drug administration (cmd.). DeWorm3 is a cluster randomized trial testing cmd. for prevalence reduction and transmission interruption. The purpose of this study is to describe coverage of cmd. in study clusters over time and correlates of coverage at individual and cluster *** From 2018-2020, DeWorm3 delivered six rounds of cmd. with 400 mg albendazole at sites in Benin, India, and Malawi. We report coverage, treatment uptake, and directly observed therapy across all rounds. Factors associated with coverage at the cluster level were identified using binomial generalized estimating equations, while factors associated with non-treatment at the individual level were identified using binomial mixed-effects *** Coverage was high across all clusters and rounds, exceeding the WHO target of 75% in all sites and across all rounds (78% to 95%); cluster-level coverage tended to increase over time. Younger, unmarried, and migratory adults were more likely to be untreated at all sites; adult males were more likely to be untreated in Benin and Malawi. Among children, girls were more likely to be untreated, as were non-school-attending and migratory children. Higher adult education was associated with greater odds of non-treatment among adults, but lower odds among children in the household. Belonging to a less wealthy or minority language-speaking household was associated with non-treatment among both adults and *** It is possible to deliver community-wide md. with high coverage. Unique individual and community-level factors influence treatment across settings,

关键词： Soil-transmitted helminths Mass drug administration Albendazole Community Coverage

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