对于在酸性攻击下水性/土壤的固定,从Pseudochrobactrum sp.转换的酸酸是否有作用? DL-1诱导的瓦特里特必然显示出更高的稳定性?
Mingping Sheng1, Yikai Liu2, Guoquan Zeng2
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education, College of Life Science, Sichuan University, Chengdu 610065, China.
Journal of hazardous materials
|August 25, 2024
概括
使用瓦特里特的微生物诱导碳酸盐沉 (MICP) 显示出对固定的优越稳定性,即使在酸性条件下. 将瓦特里特转化为酸 (HAP) 进一步提高了长期稳定性,为重金属整治提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- 微生物诱导碳酸盐沉 (MICP) 用于重金属固定.
- 对于MICP产品的长期稳定性,尤其是在酸性条件下,仍然是一个挑战.
- (Cd) 污染对环境和健康构成重大风险.
研究的目的:
- 为了提高稳定性,研究MICP诱导的瓦特里特转化为酸 (HAP).
- 评估瓦特里特和HAP在各种条件下固定 (Cd) 的有效性.
- 为了比较瓦特里特和HAP在土壤中的性能,Cd固定和生态影响.
主要方法:
- 伪黑白 sp. 的种类. DL-1被用来诱导瓦特里特的降水.
- 石转化为HAP是在30°C时实现的.
- 稳定性测试涉及水性Cd固定在不同的pH值和土壤Cd固定在模拟的酸雨下.
- 测量了Cd脱吸率和固定率.
主要成果:
- 在pH2.0-10.0.0范围内,Cd吸附的HAP表现出明显较低的Cd2+脱吸率 (0.19-0.61 ‰) 与Cd吸附的瓦特里特 (3.96-4.35 ‰) 相比.
- 在土壤中,2%的瓦特里特在酸雨下实现了可交换Cd的51.00%固定率和碳酸Cd的-0.18%溶解率.
- 2%的HAP表现较低,固定率为16.78%,溶解率为1.31%.
- 与HAP相比,瓦特里特在土壤生态评估中表现优越.
结论:
- 由于其在土壤和水中的良好稳定性,特别是在酸性攻击下,DL-1诱导的瓦特里特为MICP的Cd固定提供了直接应用价值.
- 本文介绍的矿物从瓦特里特转化为HAP的转化策略有效地进一步提高了Cd在水环境中的稳定性.
- 与HAP相比,瓦特里特在环境修复中的实际应用方面显示出更大的前景.
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