[1]涂理达,周慧平,姚臻晖,等.磷肥对镉铅铜锌复合污染土壤的钝化修复[J].常州大学学报(自然科学版),2024,36(01):49-59.[doi:10.3969/j.issn.2095-0411.2024.01.006]
　TU Lida,ZHOU Huiping,YAO Zhenhui,et al.Passivation remediation of cadmium-lead-copper-zinc composite polluted soil by phosphate fertilizer[J].Journal of Changzhou University(Natural Science Edition),2024,36(01):49-59.[doi:10.3969/j.issn.2095-0411.2024.01.006]
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磷肥对镉铅铜锌复合污染土壤的钝化修复()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第36卷
期数:
2024年01期
页码:
49-59
栏目:
环境科学与工程
出版日期:
2024-01-28

文章信息/Info

Title:
Passivation remediation of cadmium-lead-copper-zinc composite polluted soil by phosphate fertilizer
文章编号:
2095-0411(2024)01-0049-11
作者:
涂理达1; 周慧平1; 2; 姚臻晖1; 庞中正1
1.常州大学 环境科学与工程学院, 江苏 常州 213164; 2.南京环境科学研究所 生态环境部, 江苏 南京 210042
Author(s):
TU Lida1;  ZHOU Huiping1; 2;  YAO Zhenhui1;  PANG Zhongzheng1
1.School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China; 2.Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences, Nanjing 210042, China
关键词:
土壤;  复合重金属;  磷肥;  钝化特征
Keywords:
soil;  complex heavy metals;  phosphate fertilizer;  passivation characteristics
分类号:
X 53
DOI:
10.3969/j.issn.2095-0411.2024.01.006
文献标志码:
A
摘要:
为探寻不同磷肥及施用量对复合重金属污染土壤的钝化效果,选取安徽铜陵某矿区周边重金属复合污染的水稻土进行室内培养试验,研究了在磷酸氢二铵(DAP)、磷酸二氢钾(MPP)、磷酸三钙(TCP)和钙镁磷肥(CMP)这4种磷肥和5种施磷量条件下,土壤重金属镉(Cd)、铅(Pb)、铜(Cu)、锌(Zn)钝化特征随时间的变化。结果表明,添加4种磷肥均使土壤pH出现不同程度的升高,升高幅度从大到小依次为DAP,CMP,TCP,MPP。4种磷肥均能一定程度上钝化土壤中的Cd,Pb,且随着时间和施磷量的增加,整体钝化效果增加。在12周,施磷量为8 g/kg时,DAP,MPP,TCP和CMP对Cd的钝化效率分别达到了42.77%,41.74%,30.37%,28.31%,对Pb的钝化效率分别达到了48.55%,60.57%,37.58%,35.03%,磷肥对Cd,Pb的钝化效果主要是弱酸提取态和可还原态向残渣态转化。水溶性磷肥在复合污染土壤中对Cu,Zn具有活化风险,而枸溶性磷肥在相同施磷水平上对复合污染土壤中Pb,Cd的钝化效果相比于水溶性磷肥较差。因此磷肥适用于Pb,Cd污染土壤修复,且稳定性较好,用于修复Cu,Zn污染土壤效果较差。
Abstract:
In order to explore the passivation effect of different phosphate fertilizers and their application amounts on the soil contaminated by heavy metals, the paddy soil contaminated by heavy metals around a mining area in Tongling, Anhui was selected for indoor cultivation experiments. The passivation characteristics of soil heavy metals cadmium(Cd), lead(Pb), copper(Cu), and zinc(Zn)with time changes of 4 kinds of phosphorus fertilizers(diammonium hydrogen phosphate DAP, potassium dihydrogen phosphate MPP, tricalcium phosphate TCP and calcium magnesium phosphate fertilizer CMP)and 5 kinds of phosphorus application rates were studied. The results showed that the four kinds of phosphorus fertilizers increased soil pH to different degrees, and the order of increase was DAP, CMP, TCP, MPP. All four kinds of phosphorus fertilizers can passivate Cd and Pb in soil to a certain extent, and the overall passivation effect increases with the increase of time and phosphorus application amounts. The passivation efficiencies of DAP, MPP, TCP and CMP to Cd reached 42.77%, 41.74%, 30.37% and 28.31%, respectively, and the passivation efficiencies to Pb reached 48.55%, 60.57%, 37.58% and 35.03%, respectively. The passivation effect of phosphate fertilizer on Cd and Pb is mainly the transformation of weak acid extraction state and reducible state to residue state; water-soluble phosphate fertilizers have the risk of activation on Cu and Zn in compound polluted soil, while citric acid-soluble phosphate fertilizers are at the same phosphorus application level. The passivation effect of Pb and Cd in polluted soil is poorer than that of water-soluble phosphate fertilizer. Therefore, phosphate fertilizer is suitable for the remediation of Pb and Cd polluted soil, and has good stability, but the remediation effect of Cu and Zn polluted soil is poor.

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备注/Memo

备注/Memo:
收稿日期: 2023-09-12。
基金项目: 国家重点研发计划资助项目(2016YFD0801106)。
作者简介: 涂理达(1996—), 男, 江西宜春人, 硕士生。 通信联系人: 周慧平(1976—), E-mail: zhouhp@cczu.edu.cn
更新日期/Last Update: 1900-01-01