| 基于MSC-IDA的土壤重金属镉污染移除净化技术研究 |
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| 引用本文： | 刘倩,李爱霞,张艳青.基于MSC-IDA的土壤重金属镉污染移除净化技术研究[J].农学学报,2023,13(3):65-70. |
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| 作者姓名： | 刘倩 李爱霞 张艳青 |
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| 作者单位： | 1. 济源市环境科学研究所 |
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| 摘 要： | 受到各种条件的限制，土壤重金属镉污染采用统一净化方案并不能取得最佳治理效果。针对上述问题，提出基于MSC-IDA（磁性固体螯合剂）的土壤重金属镉污染移除净化技术。设计了4种不同的净化方案，设定不同的土壤样本（重金属镉元素含量：0.925、0.642、0.61 mg）、MSC-IDA浓度（0.01、0.05、0.1、0.20 mol/L)、净化时间（时间：0～120 min）、土壤粒径不同（50、100、200目），研究这些方案下的MSCIDA对土壤重金属镉污染的移除净化效果。结果表明：方案1条件下，在添加MSC-IDA后，3种土壤样本中镉含量均明显减少，其中样本1的去除率最高，为5.22%；方案2发现，在MSC-IDA添加量小于0.1 mol/L时，土壤中镉的去除率随MSC-IDA浓度的增加而增加，但当MSC-IDA含量超过0.1 mol/L之后，上升幅度逐渐趋于平缓，样本1 (Cd:0.925 mg/kg)去除率>样本2 (Cd:0.642 mg/kg)>样本3 (Cd:0.61 mg/kg)。方案3发现，震荡时间与镉的去除率成正比，但是90 min后，镉去除率增长趋于平...
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| 关 键 词： | MSC-IDA 土壤污染 镉 移除效率 净化 |
| 收稿时间： | 2021-12-01 |
Study on Removal and Purification Technology of Soil Cadmium Based on MSC-IDA |
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| LIU Qian,LI Aixia,ZHANG Yanqing.Study on Removal and Purification Technology of Soil Cadmium Based on MSC-IDA[J].Journal of Agriculture,2023,13(3):65-70. |
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| Authors: | LIU Qian LI Aixia ZHANG Yanqing |
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| Abstract: | Constrained by various conditions, the unified purification program for removing soil cadmium (Cd) can not achieve the best effect. A novel soil Cd pollution removal and purification technology based on magnetic solid chelator (MSC-IDA) was proposed. We collected three Cd-polluted soil samples (0.925, 0.642 and 0.61 mg/kg), set MSC-IDA concentrations (0.01, 0.05, 0.1 and 0.20 mol/L), purification time (0-120 min) and different soil particle size conditions (50, 100 and 200 mesh), and designed 4 programs to study the removal and purification efficiency of MSC-IDA on soil Cd. The results showed that under program 1, by adding MSC-IDA, the Cd content in the three Cd polluted soil samples decreased significantly, and the Cd removal rate of the first soil sample was the highest of 5.22%. The results of program 2 showed that when the addition amount of MSC-IDA was less than 0.1 mol/L, the removal rate of Cd in soil increased with the increase of MSC-IDA concentration, but when the concentration exceeded 0.1 mol/L, the increase gradually tended to be flat. The Cd removal rate of the first soil sample (Cd: 0.925 mg/kg) was higher than that of the second soil sample (Cd: 0.642 mg/kg) and the third soil sample (Cd: 0.61 mg/kg). The results of program 3 indicated that the shaking time was positively proportional to the removal rate of Cd, but after 90min, the enhancement of Cd removal rate tended to be flat and declining. Program 4 found that the larger the soil particle size, the better the purification effect of MSC-IDA was. To the three Cd-polluted soil samples, MSC-IDA had the best purification effect on the second one (Cd: 0.642mg/kg). |
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| Keywords: | MSC-IDA soil pollution cadmium removal efficiency purification |
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