通过有机和无机的修订来增强土壤固定:从吸-脱研究的见解
Md Basit Raza1,2, Siba Prasad Datta3, Debasis Golui2
1ICAR-Directorate of Floricultural Research, Pune, 411036, Maharashtra, India.
Environmental monitoring and assessment
|December 20, 2024
概括
钢是减少污染土壤中的流动性最有效的修正案. 这项研究表明,各种修改显著增强了吸收,钢铁渣显示出保持的最高能力.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 地质化学 地质化学
背景情况:
- 土壤中的 (As) 污染对环境和健康构成重大风险.
- 了解的吸附-脱附行为对于预测其在土壤生态系统中的命运至关重要.
- 探索土壤修改以减轻的流动性和生物可用性.
研究的目的:
- 评估有机 (甘包,虫) 和无机 (钢渣,飞灰) 修改剂在污染土壤中保留的有效性.
- 评估这些修正案对砂粘土 (SC) 和砂粘土 (SCL) 土壤中吸附-脱吸特性的影响.
- 确定最有效的修改来减少的流动性.
主要方法:
- 在SC和SCL土壤上进行了吸附-脱落实验,这些土壤经过了不同的修订.
- 使用兰木尔和弗洛因利希等热模型分析了吸附数据.
- 吸附最大值 (qmax) 和脱吸指数 (DI) 在不同温度 (30°C) 下计算.
- 确定了热力学参数,包括自由能量变化 (ΔG°) 和变化 (ΔS°).
主要成果:
- 所有测试的修订都显著提高了这两种土壤类型的吸收能力.
- 钢在SC和SCL土壤中表现出的最高吸附最大值 (qmax).
- 溶解指数 (DI) 值始终超过1,表明的歇斯底里溶解.
- 负 ΔG° 和正 ΔS° 值证实了吸附过程的自发性和有利性.
结论:
- 钢是污染土壤中 (V) 固定最有效的修改剂,性能优于甘包,虫和飞.
- 修正案通常改善了的吸收,从而减少了它的流动性和潜在的环境传播.
- 这些发现为针对污染地区的土壤整治战略提供了宝贵的见解.
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