不同吸水材料对镉溶液的吸收性能及对土壤镉的去除效果  

The Absorption Performance of Cd Solution and the Removal of Cd from Soil by Different Absorbent Materials

作　　者：金云飞 施维林[1] 仓龙[2,3] 陈睿涵 JIN Yunfei;SHI Weilin;CANG Long;CHEN Ruihan(College of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China;State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 211135,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]土壤与农业可持续发展全国重点实验室(中国科学院南京土壤研究所),南京211135 [3]中国科学院大学,北京100049

出　　处：《土壤》2025年第1期149-156,共8页Soils

基　　金：国家重点研发计划项目(2022YFD1700805);国家自然科学基金项目(42177032)资助。

摘　　要：以市场主流的吸水材料为对象,研究了不同吸水材料对镉溶液的吸收性能及对土壤镉的去除效果。结果表明:不同吸水材料对溶液的吸收量和对镉的吸收量存在明显差异,东洋纺明显高于其他材料,其对溶液的吸收量可达46.2~49.4 mL/g,对溶液中镉的吸收量可达0.009~0.016 mmol/g;不同吸水材料对镉离子溶液的吸收要优于对络合态镉溶液的吸收。结合活化剂EDTA和GLDA,东洋纺对土壤镉的去除率(30.4%~48.7%)均高于针刺棉(27.6%~43.1%),且处理后土壤pH略有上升,而土壤电导率则先上升随后逐步下降至与土壤原始电导率持平,不会对土壤造成负面影响。综上,与其他吸水材料相比,东洋纺具有最优的镉溶液吸收性能和土壤镉去除能力,这为重金属原位活化–表面吸附技术的研究和应用奠定了基础。In this study,the main water-absorbing materials in the market were used to study the absorption performance of Cd solution and Cd removal in soil Cd.The results showed that the solution absorption amount of Dongyang textile was significantly higher than those of other materials,reaching 46.2–49.4 mL/g,and the absorption amount of Cd could reach 0.009–0.016 mmol/g.The absorption amounts of Cd ions by different materials were superior to those of complexes formed by EDTA and GLDA with Cd.Soil Cd removal ability of Dongyang textile(30.4%–48.7%)was higher than that of needle felt(27.6%–43.1%)with the addition of EDTA and GLDA.And after treatment,soil pH slightly increased,while soil conductivity first increased and then gradually decreased to be consistent with the original soil conductivity,posing no adverse effects on soil.In conclusion,compare to other water-absorbing materials,Dongyang textile exhibited the best performance in absorbing Cd solutions and removing Cd from soil,which lays the foundation for the research and application of in-situ activation and surface adsorption technologies for heavy metals.

关 键 词：吸水材料 活化 镉 土壤 减量化修复 

分 类 号：X53[环境科学与工程—环境工程]