Srivastav Arun Lal, Pham Tien Duc, Izah Sylvester Chibueze, Singh Nirankar, Singh Prabhat Kumar
Chitkara University School of Engineering and Technology, Chitkara University, Himachal Pradesh, 174103, India.
Faculty of Chemistry, University of Science, Vietnam National University, Hanoi - 19 Le Thanh Tong, Hoan Kiem, Hanoi, 100000, Vietnam.
Bull Environ Contam Toxicol. 2022 Apr;108(4):616-628. doi: 10.1007/s00128-021-03374-6. Epub 2021 Sep 18.
Arsenic intake can cause human health disorders to the lungs, urinary tract, kidney, liver, hyper-pigmentation, muscles, neurological and even cancer. Biochar is potent, economical and ecologically sound adsorbents for water purification. After surface modifications, adsorption capacity of biochar significantly increased due to high porosity and reactivity. Adsorption capacities of the biochar derived from the municipal solid waste and KOH mixed municipal solid waste were increased from 24.49 and 30.98 mg/g for arsenic adsorption. Complex formation, electrostatic behavior and ion exchange are important mechanisms for arsenic adsorption. Organic arsenic removal using biochar is a major challenge. Hence, more innovative research should be conducted to achieve one of the 17 sustainable development goals of the United Nations i.e. "providing safe drinking water for all". This review is focused on the arsenic removal from water using pristine and modified biochar adsorbents. Recent advances in production methods of biochar adsorbents and mechanisms of arsenic removal from water are also illustrated.
摄入砷会导致人体肺部、泌尿系统、肾脏、肝脏出现健康问题，还会导致色素沉着、肌肉和神经方面的问题，甚至引发癌症。生物炭是用于水净化的高效、经济且生态友好的吸附剂。经过表面改性后，由于具有高孔隙率和反应活性，生物炭的吸附能力显著提高。源自城市固体废物和氢氧化钾混合城市固体废物的生物炭对砷的吸附容量分别从24.49毫克/克和30.98毫克/克提高。络合物形成、静电作用和离子交换是砷吸附的重要机制。使用生物炭去除有机砷是一项重大挑战。因此，应该开展更多创新性研究，以实现联合国17个可持续发展目标之一，即“为所有人提供安全的饮用水”。本综述聚焦于使用原始和改性生物炭吸附剂从水中去除砷。文中还阐述了生物炭吸附剂生产方法的最新进展以及从水中去除砷的机制。
