Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550082, PR China; University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, Wuppertal 42285, Germany; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, PR China.
J Hazard Mater. 2021 Feb 5;403:124027. doi: 10.1016/j.jhazmat.2020.124027. Epub 2020 Sep 18.
The contamination of aquatic systems with arsenic (As) is considered to be an internationally-important health and environmental issue, affecting over 115 countries globally. Arsenic contamination of aquatic ecosystems is a global threat as it can enter the food chain from As-rich water and cause harmful impacts on the humans and other living organisms. Although different factors (e.g., pH, redox potential, iron/manganese oxides, and microbes) control As biogeochemical cycling and speciation in water systems, the significance of algal species in biotransformation of As is poorly understood. The overarching attribute of this review is to briefly elaborate various As sources and its distribution in water bodies and factors affecting As biogeochemical behavior in aqueous ecosystems. This review elucidates the intriguing role of algae in biotransformation/volatilization of As in water bodies under environmentally-relevant conditions. Also, we critically delineate As sorption, uptake, oxidation and reduction pathways of As by algae and their possible role in bioremediation of As-contaminated water (e.g., drinking water, wastewater). The current review provides the updated and useful framework for government and water treatment agencies to implement algae in As remediation programs globally.
水体砷（As）污染被认为是一个具有国际重要意义的健康和环境问题，影响着全球超过 115 个国家。由于富含砷的水进入食物链会对人类和其他生物产生有害影响，因此水生生态系统的砷污染是一个全球性的威胁。尽管不同的因素（例如 pH 值、氧化还原电位、铁/锰氧化物和微生物）控制着水体中砷的生物地球化学循环和形态，但藻类在砷的生物转化中的重要性仍知之甚少。本综述的首要特点是简要阐述了各种砷源及其在水体中的分布，以及影响水生态系统中砷生物地球化学行为的因素。本综述阐明了藻类在环境相关条件下对水体中砷的生物转化/挥发的有趣作用。此外，我们还批判性地描述了藻类对砷的吸附、吸收、氧化和还原途径，以及它们在砷污染水体的生物修复（如饮用水、废水）中的可能作用。本综述为政府和水处理机构在全球范围内实施藻类砷修复计划提供了最新和有用的框架。
