酸盐阻碍从铁化中释放和氧化
Yuting Huang1, Qianjun Liu1, Jiayi Luo1
1School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
Journal of hazardous materials
|November 10, 2024
概括
酸盐肥料通过抑制化的转化来减少 (As) 在土中. 这种相互作用增强了的保留,为减少大米中积累提供了一种策略.
科学领域:
- 环境科学 环境科学
- 土壤化学 土壤化学
- 农业科学 农业科学
背景情况:
- 在田中的 (As) 污染对的安全性构成风险.
- 酸盐施肥是一种已知的减轻As污染的方法.
- 了解酸盐-铁酸盐相互作用对于酸盐封存机制至关重要.
研究的目的:
- 为了研究酸盐和铁酸盐之间的相互作用,与保留有关.
- 阐明酸盐受受酸盐受影响的酸盐封存的机制.
- 评估酸盐对铁化物转化和As流动性的影响.
主要方法:
- 控制的实验室实验改变Si/Fe比率.
- 铁化物转化为戈和血的分析.
- 测量水性As度的方法.
- 使用诸如Si-O-Fe键分析等技术进行固体特征化.
- 在酸盐共沉降铁酸盐中氧化 (III) 的评估.
主要成果:
- 酸盐的添加抑制了铁酸盐转化为哥和血的过程,这取决于Si/Fe比率.
- 酸盐保持了中性pH值,阻碍了哥酸盐的形成,增加了亚的保留.
- 水性随着酸盐的添加而显著降低 (Si/Fe比率为0.33).
- 酸盐通过Si-O-Fe键吸附到铁酸盐上,阻碍了铁酸盐的溶解和重新排列.
- 由于有限的Fe (II) 催化作用,酸盐共沉降铁酸盐中降低了As (III) 氧化.
结论:
- 酸盐施肥通过抑制铁化的转化,有效地阻碍了的释放.
- -O-Fe键的形成是酸盐在As封存中的关键作用.
- 这项研究提供了通过酸盐应用来减少大米中积累的见解.
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