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在水环境中使Cd²⁺固定使用微生物诱导的二步碳酸盐沉方法

Xiaosong Huang¹, Rongjun Zhang², Yaodong Xu³

¹School of Civil Engineering, Wuhan University, Wuhan, 430072, Hubei, China.

Journal of environmental management

|December 23, 2023

概括

一种新的两步微生物诱导碳酸盐沉 (MICP) 方法通过分离尿素水解和沉来有效地固定 (Cd2+). 这种方法克服了的.

科学领域:

环境科学环境科学
生物技术是生物技术.
地质化学地质化学

背景情况:

(Cd²⁺) 毒性显著损害微生物诱导的碳酸盐沉 (MICP) 用于生物修复.
由于尿酶抑制,传统的MICP方法在高Cd2+度方面面临局限性.
现有的提高MICP有效性的策略可能会增加成本或导致二次污染.

研究的目的:

研究Cd2+对Bacillus pasteurii中的尿酶活性的抑制作用.
评估传统MICP在水性环境中的Cd2+生物修复的疗效.
引入和评估一种新的两步MICP方法,用于增强Cd²⁺固定.

主要方法:

用管测试和数值模拟来分析传统的MICP限制.
开发了一种两步的MICP工艺,将尿素水解与重金属沉分开.
随着时间的推移,对,Cd2+和pH度进行了监测.

主要成果:

从10到40毫米的Cd2+度显著抑制了B. pasteurii.中的尿酶活性.
传统的MICP显示了较低的Cd2+去除率 (21.55-38.47%在40mMCd2+).
两步MICP方法实现了几乎完整的Cd2+固定,即使在低尿素:Cd2+比率1.5:1.0.0的情况下也是如此.

结论:

两步MICP方法有效地消除了对尿酶活性的抑制作用.
这种具有成本效益和可持续性的方法显示了修复Cd2+污染溶液的巨大潜力.
两步MICP方法为高度污染提供了一个有希望的解决方案.

关键词:

在巴西勒斯·帕斯图里 (Bacillus pasteurii) 的研究中.生物修复是一种生物修复.污染的Cd2+) 溶液.度比是指度比的比例.微生物诱导的碳酸盐沉 (MICP)删除率删除率删除率

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