| 保琼莉,刘宗阳,王柯,保万魁,黄益宗.硫酸铁复配石灰、水泥对锑矿区周边土壤锑形态分布的影响及生态风险评价[J].农业环境科学学报,2022,41(8):1730-1738. |
| 硫酸铁复配石灰、水泥对锑矿区周边土壤锑形态分布的影响及生态风险评价 |
| Effects of Fe2（SO4）3 combined with solidification agents on the distribution of different antimony forms and ecological risk in antimony-contaminated soil around an antimony mining area |
| 投稿时间：2021-11-15 |
| DOI：10.11654/jaes.2021-1319 |
| 中文关键词: 锑污染 土壤 Fe2（SO4）3 石灰 水泥 锑形态分布 生态风险 |
| 英文关键词: antimony contamination soil Fe2（SO4）3 lime cement distribution of different Sb forms ecological risk |
| 基金项目:国家重点研发计划项目（2020YFC1808702） |
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| 中文摘要: |
| 为揭示Fe2（SO4）3、石灰及水泥复配处理下锡矿山锑（Sb）污染土壤的Sb形态分布和生态风险，本研究通过室内土壤培养实验，分析了不同复配处理下土壤Sb不同形态含量和pH变化以及生态风险。结果表明：单独添加Fe2（SO4）3使土壤水溶态+交换态和碳酸盐结合态Sb分别降低53%~70%和31%~70%；Fe2（SO4）3+石灰处理仅使个别样点铁锰氧化物结合态、有机结合态或残渣态Sb含量显著降低。Fe2（SO4）3复配水泥处理使水溶态+交换态及碳酸盐结合态Sb含量增加了52%~1 264%。单独添加Fe2（SO4）3使土壤Sb生物活性降低22%~59%，Fe2（SO4）3+石灰处理使Sb生物活性降低15%~51%，降低了多数样点的生态风险，而Fe2（SO4）3复配水泥处理使Sb生物活性增加56%~828%，其生态风险等级上升至高或极高。相关分析表明，土壤pH变化显著影响了可利用态Sb（水溶态+交换态）及潜在可利用态Sb（碳酸盐结合态和铁锰氧化物结合态）含量。研究表明，本研究单独添加Fe2（SO4）3具有较好的Sb固化-稳定化效果，Fe2（SO4）3复配石灰通过提高土壤pH，弱化了对Sb的固化-稳定化，Fe2（SO4）3复配水泥会显著提高土壤pH，增加可利用态Sb含量，使Sb迁移性、生物有效性及生态风险增加。 |
| 英文摘要: |
| In order to understand the effects of Fe2(SO4)3 combined with lime and cement on the content of different forms of antimony (Sb)and its ecological risk in soils with different pollution degrees in a Sb mining area of an antimony mine, the content of different forms of Sb, pH, and ecological risk in soil treated with different remediation agents through a soil culture experiment were taken into account. The results showed that the addition of Fe2(SO4)3 alone reduced the contents of soluble + exchangeable and carbonate-bound Sb by 53%~70% and 31%~70%, respectively; Fe2(SO4)3 + lime treatment only significantly reduced the content of iron-manganese-oxide-bound, organic-bound, or residual Sb in individual sampling sites soils. The treatments of Fe2(SO4)3 compound cement increased the content of soluble + exchangeable and carbonate-bound Sb by 52%~1 264%. Moreover, the addition of Fe2(SO4)3 alone reduced the biological of Sb by 15%~51% and reduced the ecological risk. However, treatments of Fe2(SO4)3 compound cement increased the biological activity of Sb by 56%~828%, and its ecological risk increased to a high or extremely high level. Correlation analysis showed that the change of soil pH significantly affected the available Sb(water-soluble + exchangeable)and potential available Sb(carbonate-bound and iron-manganeseoxide-bound). Overall, Fe2(SO4)3 alone showed good effects on Sb solidification stabilization. Fe2(SO4)3 compound lime weakened the solidification stabilization of Sb by increasing the soil pH compared to the addition of Fe2(SO4)3 alone, while Fe2(SO4)3 compound cement significantly increased the soil pH, available-Sb content, and mobility, bioavailability, and ecological risk of Sb. |
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