生物质吸附剂去除废水中镉的研究进展

摘要

The current research and application status of cadmium removal from wastewater using biochar adsorbents is reviewed.The cause,present situation and harm of the cadmium contaminate are summarized.Biochar adsorbents includes agricultural and forestry wastes,microorganism and activated sludge,the mechanism and influence factors of adsorption of biochar adsorbents were analyzed (the pH value,initial cadmium concentration,adsorption time,dose of adsorbent and coexistence ion in solution).The adsorbents which have adsorbed heavy metal ions can be generated via acid solution desorption.Biochar adsorption,regarded as an important,cheap and rapid method to treat cadmium polluted water,still needs to be studied for recycling cadmium and industry application in future.%对生物质吸附剂去除废水中镉的研究和应用现状进行了综合评述.概述了镉污染来源、现状和危害,生物质吸附剂主要有农林废弃物、微生物、活性污泥类等;分析了生物质吸附剂吸附镉的机理和影响因素(溶液pH值、镉离子初始浓度、吸附剂用量、吸附时间、溶液中共存离子);已吸附重金属离子的生物质吸附剂,可以通过酸性溶液解吸再生.生物质吸附法作为一种重要、廉价、快速的镉污染废水的处理方法,对镉的回收技术和工业实际应用还有待进一步研究和提高.