含磷铁尾矿对废水吸附除铬的实验研究  

Experimental Study on Chromium Removal Performance of Wastewater by Phosphorus-Containing Iron Tailings

作　　者：周渝飞 袁晓丽 陈茜茜 马生智 赵陈 罗福明 ZHOU Yufei;YUAN Xiaoli;CHEN Xixi;MA Shengzhi;ZHAO Chen;LUO Fuming(School of Metallurgy and Power Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Chongqing CISDI Information Technology Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]重庆科技大学冶金与动力工程学院,重庆401331 [2]重庆赛迪信息技术有限公司,重庆401120

出　　处：《重庆科技大学学报（自然科学版）》2024年第5期43-49,共7页Journal of Chongqing University of Science and Technology(Natural Sciences Edition)

基　　金：国家级大学生创新创业训练计划项目“基于硫酸亚铁制备的新生态磁铁矿-针铁矿深度净化处理酸性含铅废水研究”(202311551005);重庆留学人员回国创新计划项目“低品位表外磷铁矿对矿山酸性含镉废水资源化处理及循环利用研究”(CX2020088);重庆市自然科学基金面上项目“低品位磷铁负载壳聚糖对酸性含铜废水的协同吸附除铜效应及调控机制”(CSTB2022NSCQ-MSX0399);重庆科技大学科技创新项目“基于含铁废液制备磁铁矿-羟基氧化铁的除铬机理研究”(YKJCX2220220)。

摘　　要：以废弃的含磷铁尾矿作为吸附剂对含铬(Cr^(6+))废水进行处理。采用XRD、SEM等表征技术,考察了初始pH值、吸附剂加入量、初始Cr^(6+)浓度、吸附时间和吸附温度等因素对除Cr^(6+)效果的影响。含磷铁尾矿对Cr^(6+)的吸附是物理吸附、静电吸附和化学吸附等综合作用的结果。实验结果表明,在初始pH值为5.0~7.5,初始Cr^(6+)质量浓度为40~50 mg L,吸附剂加入量为20 g L,吸附剂粒度小于0.15 mm,吸附时间为25 min,吸附温度为25℃的最佳实验条件下,含磷铁尾矿对Cr^(6+)的吸附率达99%以上,且吸附后的Cr^(6+)质量浓度低于0.5 mg L。Waste phosphorus-containing iron tailings are used as adsorbents to treat chromium-containing wastewater.The effects of initial pH,adsorbent addition,initial Cr^(6+)concentration,adsorption time and adsorption temperature on Cr^(6+)removal are investigated using XRD,SEM and other characterization techniques.The Cr^(6+)adsorption mechanism of phosphorus-containing iron tailings is the result of the combined function of physical adsorption,electrostatic adsorption and chemical adsorption.The experimental results show that the adsorption rate of Cr^(6+)is above 99%under the optimal experimental conditions that initial pH is 5.0-7.5,initial Cr^(6+)concentration is 40-50 mg L,adsorbent addition is 20 g L,adsorbent particle size is less than 0.25 mm,adsorption time is 25 min and adsorption temperature is 25℃,and the adsorption concentration of Cr^(6+)is lower than 0.5 mg L.

关 键 词：六价铬离子 含磷铁尾矿 吸附 化学吸附 

分 类 号：X703[环境科学与工程—环境工程]