https://scholars.lib.ntu.edu.tw/handle/123456789/598574
標題: | An integrated active biochar filter and capacitive deionization system for high-performance removal of arsenic from groundwater | 作者: | Cuong D.V Wu P.-C Liou S.Y.H CHIA-HUNG HOU YA-HSUAN LIOU |
關鍵字: | arsenic removal;capacitive deionization;engineered biochar;fixed bed filter;groundwater remediation;Chemicals removal (water treatment);Energy utilization;Groundwater pollution;Manganese oxide;Pollution control;Potable water;Water quality;Arsenic removal;Bio chars;Capacitive deionization;Electrosorption;Engineered biochar;Fixed bed filter;Ground water remediation;Performance;Removal capacity;Removal of arsenics;Groundwater;activated carbon;argon;arsenic;biochar;ground water;manganese dioxide;unclassified drug;charcoal;drinking water;filtration;groundwater;manganese;water quality;water treatment;World Health Organization;adsorption kinetics;Article;body weight loss;complex formation;conductance;controlled study;current density;desorption;energy consumption;field emission scanning electron microscopy;gasification;inductively coupled plasma mass spectrometry;isotherm;moisture;oxidation reduction reaction;particle size;pore size distribution;pore volume;precipitation;retention time;rice husk;surface area;thermogravimetry;vaporization;waste component removal;water filtration;water standard;adsorption;water management;water pollutant;Adsorption;Arsenic;Charcoal;Water Pollutants, Chemical;Water Purification | 公開日期: | 2022 | 卷: | 423 | 來源出版物: | Journal of Hazardous Materials | 摘要: | An integrated process of filtration and electrosorption was first applied to enable high-performance arsenic removal for groundwater remediation. An active manganese dioxide-rice husk biochar composite (active BC) filter was utilized for oxidization of As(III) to As(V) and initial removal of As(III, V). Subsequently, electrosorption by capacitive deionization (CDI) was applied as a posttreatment to improve arsenic removal. The active BC approach exhibited fast removal rates of 0.75 and 0.63 g mg–1 h–1 and high maximum removal capacities of 40.76 and 48.15 mg g–1 for As(III) and As(V), respectively. Importantly, column experiments demonstrated that the arsenic removal capacity in the active BC filter was 2.88 mg g–1, which was 72 times higher than that of BC. The results were due to the high efficiency (94%) of redox transformation of As(III) to As(V). The electrosorptive removal of arsenic was further controlled by changing the voltage in CDI. With a charging step of 1.2 V, the total arsenic concentration can be reduced to 0.001 mg L–1 with a low energy consumption of 0.0066 kW h m?3. Furthermore, the integrated system can remove As from real groundwater to achieve the World Health Organization guideline value for drinking water quality. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114162995&doi=10.1016%2fj.jhazmat.2021.127084&partnerID=40&md5=e9c849a13063453dd6210798e07677f5 https://scholars.lib.ntu.edu.tw/handle/123456789/598574 |
ISSN: | 03043894 | DOI: | 10.1016/j.jhazmat.2021.127084 |
顯示於: | 環境工程學研究所 |
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