| 景睿,裴楠,狄雪荣,梁学峰,秦旭,彭云英,徐应明,黄青青,孙约兵.赤铁矿与巯基坡缕石复配对砷镉复合污染土壤修复效应研究[J].农业环境科学学报,2024,43(2):285-293. |
| 赤铁矿与巯基坡缕石复配对砷镉复合污染土壤修复效应研究 |
| Effects of combination treatments of mercapto palygorskite and hematite on remediation of Cd-As contaminated soil |
| 投稿时间：2023-04-19 |
| DOI：10.11654/jaes.2023-0305 |
| 中文关键词: 巯基坡缕石 赤铁矿 水稻 镉砷复合污染 土壤 |
| 英文关键词: mercapto palygorskite hematite rice cadmium–arsenic co-contamination soil |
| 基金项目:国家重点研发计划项目（2018YFD0800300）；国家自然科学基金项目（31971525，41601343） |
| 作者 | 单位 | E-mail | | 景睿 | 东北农业大学资源与环境学院, 哈尔滨 150030
农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 裴楠 | 东北农业大学资源与环境学院, 哈尔滨 150030
农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 狄雪荣 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 梁学峰 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 秦旭 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 彭云英 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 徐应明 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 黄青青 | 农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 孙约兵 | 东北农业大学资源与环境学院, 哈尔滨 150030
农业农村部产地环境污染防控重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | sunyuebing2008@126.com |
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| 中文摘要: |
| 为探讨巯基坡缕石（MPAL）和赤铁矿（Fe2O3）对土壤重金属污染钝化阻控效应，以江西某农田Cd-As复合污染水稻土为供试土壤，采用盆栽试验研究了巯基坡缕石、赤铁矿单一以及复配处理下土壤pH值、Cd-As有效态与形态分布及水稻生物量和Cd、As、Fe含量。结果表明：施加不同材料后水稻籽粒生物量较对照显著增加了2.37~2.45倍，土壤中DTPA-Cd含量显著降低16.94%~22.57%（P<0.05）。土壤连续浸提形态分析显示，MPAL和Fe2O3复配处理提高了土壤中无定形态铁氧化物结合态Cd、As含量。MPAL和Fe2O3复配处理下水稻根系Cd和As含量降幅分别达7.14%、25.13%，不同处理下稻米Cd含量降幅为40.00%~60.00%，但籽粒As含量处理间差异不显著。研究表明，巯基坡缕石和赤铁矿复配材料可以有效降低土壤中Cd和As含量，减少水稻对Cd和As的吸收，具备Cd-As复合污染农田修复和安全利用的潜在应用价值。 |
| 英文摘要: |
| A pot experiment was performed to investigate the remediation effects of single and combination treatments of mercapto palygorskite（MPAL）and hematite（Fe2O3）on Cd–As contaminated soil. The soil pH value, availability and speciation distribution of Cd and As in the soil, biomass of different parts of rice, and contents of Cd, As, and Fe in the rice parts were determined. The results showed that all treatments significantly increased the biomass of rice grains by 2.37 – 2.45 times in comparison to the control. The DTPA-Cd content in the soil was reduced by 16.94%–22.57%（P<0.05）. The combination treatment of MPAL and Fe2O3 increased the proportion of amorphous iron oxide-bound Cd/As in the soil, as demonstrated by sequential extraction results. The combination treatment significantly reduced Cd and As concentrations in roots by 7.14% and 25.13%, respectively. All treatments reduced the Cd concentration in grain by 40.00%–60.00%, but they had no significant effect on the As concentration in grain. These results showed that combination treatment of MPAL and Fe2O3 can effectively reduce the available Cd and As contents in soil and the Cd and As concentrations in rice, indicating that the combination treatment has potential application value for remediation and safe utilization of Cd–As contaminated farmland. |
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