活性炭作为一种强大的DOM吸附剂,可以减轻在被洪水淹没的采矿影响的土壤中释放的和的释放
Enze Zhang1, Song Wu1, Jinsong Liu1
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province 210023, China.
Journal of hazardous materials
|May 24, 2024
概括
活性炭有效地修复了被洪水淹没的矿山土壤中的 (As) 和 (Sb) 污染. 它通过抑制铁的减少而起作用,与生物炭不同,从而减少金属出到食物链中.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 土壤科学 土壤科学
背景情况:
- 在中国南部的采矿土壤中, (As) 和 (Sb) 的共同污染对环境构成风险.
- 矿区的洪水导致厌氧条件,增加了As和Sb的调动和生物可用性.
- 污染的土壤威胁着食物链的完整性.
研究的目的:
- 评价活性炭 (AC) 和生物炭 (BC) 在修复受矿业影响的被水淹没的土壤中被As和Sb污染的疗效.
- 了解AC和BC影响As和Sb移动性的机制.
主要方法:
- 活性炭 (AC) 和生物炭 (BC) 应用于被洪水淹没的采矿影响的土壤.
- (As) 和 (Sb) 调动和生物可用性的监测.
- 铁 (Fe) 氧化物还原和溶解有机物 (DOM) 相互作用的分析.
主要成果:
- 活性炭 (AC) 通过抑制Fe (III) 矿物质的减少和溶解,显著降低了Sb调动 (9-97%) 和As调动 (9-67%).
- 生物炭 (BC) 对 Sb 和 As 调动没有显著影响.
- 电流的有效性与其强烈吸附溶解有机物 (DOM) 有关,该物质作为微生物Fe (III) 减少的电子运送器.
结论:
- 活性炭 (AC) 是一个有前途的材料,用于修复As和Sb共同污染的被洪水淹没的矿山土壤.
- 通过隔离溶解的有机物 (DOM),AC减轻了金属漏,从而抑制了微生物Fe (III) 的减少.
- 这些发现凸显了DOM动态对被洪水淹没的采矿土壤中As和Sb的环境命运的重要性.
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