生物质材料螯合去除酸性矿坑水中铁锰离子和硫酸根离子的研究  

Study on removal of iron,manganese and sulfate ions from acid mine drainage by biomass chelation

作　　者：王嘉伟 王洪浩 贺欣 晏泓[2] 晋华[1] WANG Jia-wei;WANG Hong-hao;HE Xin;YAN Hong;JIN Hua(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《应用化工》2024年第5期1042-1046,共5页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(22178242)。

摘　　要：以壳聚糖(CS)、海藻酸钠(SA)为原料,氯化钙为交联剂,采用乳化交联法,制备SA与CS/SA两种凝胶球,通过吸附法去除酸性矿坑水(AMD)中铁离子、锰离子及硫酸根离子,并与壳聚糖和海藻酸钠两种生物质材料的吸附性能进行对比。结果表明,在反应温度为25℃,搅拌时间为6 h,投加量为12.5 g/L时,CS对AMD中铁离子、锰离子及硫酸根离子的去除率分别为100%,21.73%及88.88%,SA为62.1%,6.38%及17.11%,SA凝胶球为80.57%,9.03%及21.68%,CS/SA凝胶球为39.75%,4.86%及57.94%。将CS/SA凝胶球制成气凝胶,在投加量为5 g/L时,大大提高了其对铁离子的去除率,去除率可达97.7%,对锰离子和硫酸根离子提升较小,去除率分别为5.07%,50.57%。Using chitosan(CS)and sodium alginate(SA)as raw materials and calcium chloride as a crosslinking agent,two kinds of gel microspheres,SA and CS/SA,were prepared through an emulsification cross-linking method.The adsorption properties of SA gel microspheres,CS/SA gel microspheres,chitosan,and sodium alginate were compared for removing iron,manganese,and sulfate ions from acid mine drainage(AMD).The results showed that when the reaction temperature was 25℃,the stirring time was 6 h,and the dosage was 12.5 g/L,chitosan had the best removal effect on the ions in AMD,with removal ratios of 100%,21.73%and 88.88%for iron,manganese,and sulfate ions,respectively.SA Gel microspheres followed with removal ratios of 80.57%,9.03%and 21.68%.SA Had the lowest removal ratios,with 62.1%,6.38%and 17.11%for the above three ions.CS/SA Gel microspheres with 39.75%,4.86%and 57.94%.When CS/SA gel microspheres were prepared into aerogel,the removal ratios of iron ions were greatly improved when the dosage was 5 g/L,the removal rate reached 97.9%,and the removal ratios of manganese and sulfate ions were little improved,with the removal ratios of 5.07%and 50.57%,respectively.

关 键 词：酸性矿坑废水 重金属 螯合吸附 海藻酸钠 壳聚糖 

分 类 号：TQ424[化学工程]