不同类型保水剂对Cd^(2+)吸附的差异对比及应用研究  

Comparison and Application of Different Types of Water Retaining Agents on Cd^(2+)Adsorption

作　　者：张婷婷[1,2] 汪溪远 吴皓颖[1,2] 马玉 师庆东 ZHANG Tingting;WANG Xiyuan;WU Haoying;MA Yu;SHI Qingdong(College of Ecology and Environment,Xinjiang University,Urumqi,Xinjiang 830017,China;Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi,Xinjiang 830046,China;Urumqi Comprehensive Survey Center on Natural Resources,China Geological Survey,Urumqi,Xinjiang 830057,China)

机构地区：[1]新疆大学生态与环境学院,新疆乌鲁木齐830017 [2]新疆大学绿洲生态重点实验室,新疆乌鲁木齐830046 [3]中国地质调查局乌鲁木齐自然资源综合调查中心,新疆乌鲁木齐830057

出　　处：《矿业研究与开发》2023年第6期154-162,共9页Mining Research and Development

摘　　要：为了研究不同保水剂用于重金属污染修复的适用条件和最佳技术参数,对两种高分子保水剂聚丙烯酰胺(PAM)和聚丙烯酸盐(PAAS)对环境中Cd^(2+)的吸附效果开展了试验研究。试验结果表明,反应时间和pH是影响PAM的Cd^(2+)吸附效果的主要因素,最佳反应时间为0.5h,最佳pH为7,而PAAS吸附镉的主要影响因素是PAAS的添加量和水分,最佳添加量是0.3g/10g,最佳水土比为10∶1;正交试验结果与单因素试验结果有些许差别,PAM正交试验的最佳吸附条件是:PAM用量为0.05g/10g,Cd^(2+)的浓度为0.25g/L,吸附时间为3h;PAAS则是:PAAS用量为0.15 g/10g,Cd^(2+)的浓度为0.1g/L,吸附时间为1h;PAM比PAAS更适合应用于准东干旱矿区土壤重金属污染的治理,PAM的最佳用量为0.05g/10g。通过对比两种保水剂在不同环境中对Cd^(2+)的吸附效果,认识了不同类型保水剂的作用性质,为干旱矿区重金属污染土壤的修复提供参考依据。In order to study the applicable conditions and optimal technical parameters of different water retention agents for remediation of heavy metal pollution,an experimental study was conducted on the adsorption effect of two polymer water retention agents,polyacrylamide(PAM)and polyacrylate(PAAS),on Cd^(2+)in the environment.The experimental results are concluded as follows.Firstly,reaction time and pH are the main factors affecting the adsorption effect of PAM.The optimal reaction time is 0.5hand pH is 7.The main influencing factors of PAAS are the addition amount and water content.The optimal addition amount is 0.3g/10g,and the optimal water-soil ratio is 10∶1.Secondly,the results of PAM and PAAS orthogonal experiment are slightly different from the results of single factor experiment.The optimal conditions of PAM orthogonal experiment adsorption are addition amount of 0.05g/10g,Cd^(2+)concentration of 0.25g/L,and adsorption time of 3h.While the optimal conditions of PAAS are the addition amount of 0.15g/10g,the Cd^(2+)concentration of 0.1g/L,and the adsorption time of 1h.PAM is more suitable than PAAS for the treatment of soil heavy metal pollution in Zhundong arid mining area,and the optimal addition amount of PAM is 0.05g/10g.By comparing the adsorption effects of two kinds of water retaining agents on Cd^(2+)in different environments,the action properties of different types of water retaining agents can be known,which can provide a reference for the remediation of heavy metal contaminated soil in arid mining areas.

关 键 词：重金属污染土壤 镉 聚丙烯酰胺 聚丙烯酸盐 吸附差异 

分 类 号：TD989[矿业工程—选矿] TQ424.1[化学工程] X53[环境科学与工程—环境工程]