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Biochar and zero-valent iron sand filtration simultaneously removes contaminants of emerging concern and Escherichia coli from wastewater effluent

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Biochar 2023年第1期5卷 710-722页

作者： Linyan Zhu Suhana Chattopadhyay Oluwasegun Elijah Akanbi Steven Lobo Suraj Panthi Leena Malayil Hillary A.Craddock Sarah M.Allard Manan Sharma Kalmia E.Kniel Emmanuel F.Mongodin Pei C.Chiu Amir Sapkota Amy R.Sapkota Maryland Institute for Applied Environmental Health University of Maryland School of Public HealthCollege ParkMDUSA Department of Civil and Environmental Engineering University of DelawareNewarkDEUSA Department of Pediatrics University of California San DiegoSan DiegoCAUSA United States Department of Agriculture Agriculture Research ServiceNortheast AreaBeltsville Agriculture Research CenterEnvironmental Microbiology and Food Safety LaboratoryBeltsvilleMDUSA Department of Animal and Food Science University of DelawareNewarkDEUSA Institute for Genome Sciences and Department of Microbiology and Immunology University of Maryland School of MedicineBaltimoreMDUSA Department of Epidemiology and Biostatistics School of Public HealthUniversity of MarylandCollege ParkMDUSA Present Address:Division of Lung Diseases National Institutes of Health(NIH)National HeartLung and Blood Institute(NHLBI)BethesdaMDUSA

Advanced treated municipal wastewater is an important alternative water source for agricultural ***,the possible persistence of chemical and microbiological contaminants in these waters raise potential safety concerns with regard to reusing treated wastewater for food crop *** low-cost and environmentally-friendly filter media,biochar(BC)and zero-valent iron(ZVI),have attracted great interest in terms of treating reused ***,we evaluated the efficacy of BC-,nanosilver-amended biochar-(Ag-BC)and ZVI-sand filters,in reducing contaminants of emerging concern(CECs),Escherichia coli(***)and total bacterial diversity from wastewater *** experiments were conducted with control quartz sand and sand columns containing BC,Ag-BC,ZVI,BC with ZVI,or Ag-BC with *** filtration,Ag-BC,ZVI,BC with ZVI and Ag-BC with ZVI demonstrated more than 90%(>1 log)removal of *** from wastewater samples,while BC,Ag-BC,BC with ZVI and Ag-BC with ZVI also demonstrated efficient removal of tested *** bacterial diversity was also observed after filtration;however,differences were marginally *** addition,significantly(pwater samples collected during warmer versus colder *** of silver ions occurred from Ag-BC columns;however,this was prevented through the addition of *** conclusion,our data suggest that the BC with ZVI and Ag-BC with ZVI sand filters,which demonstrated more than 99%removal of both CECs and *** without silver ion release,may be effective,low-cost options for decentralized treatment of reused wastewater.

关键词： Biochar Zero-valent iron Wastewater reuse Contaminants of emerging concern recycled water E.coli

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