期刊论文

Remediation of paddy soil complexly polluted with cadmium and arsenic using 2 combined amendments

Zeng, M.

中文

环境科学学报

0253-2468

2018

38

5

2008-2013

10.13671/j.hjkxxb.2017.0420

Supported by the National Natural Science Foundation of China(No.41501344), the Special Fund for Ministry of Agriculture and Finance(No.NBCH 2016) and the Key Discipline Construction Projects in Hunan Province(No.2006180)

本校为第一且通讯机构

将2种复合改良剂LI(碳酸钙+铁粉)和HI(羟基磷灰石+铁粉)施加于镉、砷复合污染稻田土壤,设置投加比例分别为1∶2、1∶1、2∶1,通过分析熟化后土壤的pH值、毒性浸出(TCLP提取态)镉、砷含量及交换态镉和砷含量,研究了复合改良剂同时固定这两种污染元素的效果.结果表明,施加LI使土壤pH值提高了0.60~ 1.21,降低了土壤TCLP提取态镉、交换态镉含量,以及TCLP提取态砷和交换态砷含量;与对照相比,配比为2∶1的LI使土壤TCLP提取态镉含量降低了60.97%,效果较好;配比为1∶2和1∶1的LI分别使TCLP提取态砷含量降低了29.81%、 29.85%;配比为1∶2的LI使交换态砷含量降低了55.18%.施加HI同样提高了土壤的pH值(升高...

Two combined amendments, LI (calcium carbonate + iron powder) and HI (hydroxyapatite + iron powder) with ratios of 1:2, 1:1 and 2:1, were applied to a paddy soil complexly polluted with Cd and As. Through comparison of soil pH values, TCLP extractable contents of soil Cd and As, and exchangeable contents (using 0.01 mol·L-1 CaCl2) of soil Cd and As, the simultaneous stabilization effect of soil Cd and As was evaluated. The results showed that application of LI increased the soil pH values (ranging 0.60~1.21), reduced the contents of TCLP extra...