全文总字数：16604字
土壤重金属吸附剂的制备及性能表征研究
摘 要
蒙脱土是一种我国储量很大丰富的粘土矿物，对重金属离子有良好的吸附能力。本实验研究其对重金属离子的吸附能力。本实验以0.5、1、5、20%的盐酸浓度制备了酸改性蒙脱土作为重金属离子的吸附剂。将吸附剂包覆在电极表面，再经过电极电迁移土壤中重金属离子60min-75min左右，以实现土壤中电迁移的目的。将测试电极外包覆蒙脱土中重金属离子的含量，采用原子吸收法及分光光度法，还要测量被迁移土壤中重金属含量，以蒙脱土中重金属含量-测试后土壤中重金属含量/测试前土壤重金属含量作为一个特征值来评估性能。通过红外等手段来判断蒙脱土吸附剂的吸附性能。
关键词：电迁移；蒙脱土；重金属离子吸附
Study on Preparation and characterization of soil heavy metal adsorbent
Abstract
Montmorillonite is a kind of clay mineral with abundant reserves in China. It has good adsorption capacity for heavy metal ions. The adsorption capacity of heavy metal ions was studied in this experiment. In this experiment, acid-modified montmorillonite was prepared with 0.5, 1, 5 and 20% hydrochloric acid concentration as adsorbent for heavy metal ions. The adsorbent was coated on the surface of the electrode and then electromigrated heavy metal ions through the electrode for about 60-75 minutes to achieve the purpose of electromigration in the soil. The contents of heavy metals in the soil were measured by atomic absorption spectrometry and spectrophotometry. The contents of heavy metals in the soil were also measured. The content of heavy metals in montmorillonite - the content of heavy metals in soil after testing / the content of heavy metals in soil before testing was used as an eigenvalue to evaluate the performance of montmorillonite. The adsorption performance of montmorillonite adsorbent was judged by infrared and other means.
Keywords:Electromigration;Montmorillonite;Heavy metal ion adsorption目 录
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