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通过过氧化与零价值铁相结合的增强现场沉积物修复:同时去除和稳定

Yue Zang¹, Pan Yan², Tongtong Ren²

¹School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China; Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali 671000, PR China.

The Science of the total environment

|November 1, 2024

概括

过氧化 (CaO2) 和零价铁 (ZVI) 的合有效地去除和稳定沉积物中的. 这种综合方法增强了有机物质的去除,并促进了脱化,为控制安化提供了一个新的解决方案.

科学领域:

环境科学环境科学
水的化学水的化学
沉积物修复沉积物修复

背景情况:

幼化是水生系统中 (N) 和 (P) 过量导致的重大环境问题.
沉积物充当N和P的来源和沉积点,使修复工作复杂化.
现有的现场沉积物修复方法往往无法同时处理N去除和P稳定.

研究的目的:

研究过氧化 (CaO2) 和零价铁 (ZVI) 对沉积物中的,和有机物质的联合作用.
评估CaO2-ZVI合在沉积物中同时去除N和稳定P的有效性.
了解在CaO2-ZVI处理下N和P转化和有机物降解背后的机制.

主要方法:

用不同比例的CaO2和ZVI处理的沉积物进行了化实验.
测量包括总 (TN),总 (TP),有机物 (OM) 和沉积物和覆盖水中的营养度.
进行了微生物群落的分析,特别是与脱相关的属.

主要成果:

合CaO2-ZVI显著提高了TN去除比率167.91% (与单独的CaO2相比) 和152.04% (与单独的ZVI相比).
由于氧化增强,有机物去除效率提高了118.51%.
与脱相关的微生物属得到了丰富,P通过化学沉得到了稳定,将有机P转化为与结合的P,从而增加了沉积物TP,减少了水中的P度.

结论:

O2和ZVI的合提供了一种协同方法,用于有效的in-situ沉积物修复.
这种方法同时实现了显著的去除和稳定,解决了化的主要驱动因素.
有机物增强的分解和ZVI的电子捐赠促进了脱,而化学沉稳定了沉积物中的.

关键词:

过氧化是一种过氧化.移除的方法移除的方法稳定的稳定作用沉积物整治沉积物整治没有价值的铁.

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