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从沉积物中控制释放的效率和机制,使用基于生物的P-无活化剂

Changxiong Chen¹, Fei Li¹, Chunhua Shen¹

¹College of Civil Engineering, Huaqiao University, Xiamen 361021, China.

Journal of environmental sciences (China)

|September 21, 2024

概括

生物基P-无活化剂 (BA-PIA) 通过转化P分数并减少可变,有效地控制从沉积物中释放的. 这种方法显著降低了覆盖水和沉积物间歇水中的,为优化提供了一种实际的解决方案.

科学领域:

环境化学环境化学
水质管理水质管理
沉积物地质化学沉积物地质化学

背景情况:

缩是一种主要的地表水问题,由沉积物释放的 (P) 驱动.
基于生物的P-无活化剂 (BA-PIA) 显示出对P控制的希望,但其机制需要进一步阐明.

研究的目的:

研究BA-PIA封顶的效率和机制,以控制沉积物中P的释放.
评估BA-PIA对P分数,可变P和铁氧化还原过程的影响.

主要方法:

在湖泊沉积物上应用BA-PIA封顶.
在沉积物和覆盖水中分析P分量 (NaOH可提取,HCl可提取) 和可变P (DGT-可变P).
在间歇水中测量可溶性反应性P (SRP) 和DGT测量可溶性Fe (II).
在沉积物-水界面上的P扩散流量量化.

主要成果:

BA-PIA上限将移动P转化为稳定分数,使DGT-labileP被动化,并创建了一个"P静态层".
在上层水中观察到总P (95.6%),SRP (92.7%) 和DGT-labileP (96.5%) 的显著减少.
在沉积物-水界面上减少了SRP (91.3%) 和明显P (97.8%) 的扩散流.
在沉积物间歇水中减少了SRP,DGT-labile P和labile Fe(II),主要在顶部30毫米层.

结论:

BA-PIA封顶通过改变P分化和生物可用性,有效地抑制了沉积物中的P释放.
该方法影响Fe的氧化还原循环,进一步促进P的固定.
这些发现为应用BA-PIA上限在管理温化方面提供了科学依据.

关键词:

活动上限是主动上限.基于生物的p-无活化剂.释放可以释放.沉积物沉积物是一种沉积物.

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