通过水凝 - 生物复合物固定微囊素,以提高饮用水处理期间的生物降解率
Lixun Zhang1, Shengyin Tang1, Sunny Jiang1
1Department of Civil and Environmental Engineering, University of California, Irvine, California 92697, United States.
ACS ES&T water
|September 14, 2023
概括
一种新型的poly ((diallyldimethylammonium chloride) -生物炭复合物有效地从水中去除微囊素-LR (MC-LR). 这种生物过系统为安全的饮用水提供了快速,选择性的吸附和随后的生物降解.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 材料科学 材料科学 材料科学
背景情况:
- 微囊素-LR (MC-LR) 是一种普遍存在的淡水藻类毒素,威胁着饮用水的安全.
- 现有的水处理方法在有效去除MC-LR方面面临挑战.
研究的目的:
- 开发一种工程化生物过系统,使用聚二甲基化) -生物炭 (PDDA-BC) 复合物.
- 为了实现MC-LR的选择性和快速捕获以后的生物降解.
主要方法:
- PDDA-BC复合物的制造和表征.
- 吸附实验以评估MC-LR捕获效率和动力学.
- 密度函数理论 (DFT) 计算以了解吸附机制.
- 整合PDDA-BC与MC降解细菌,以进行联合吸附-生物降解过程.
主要成果:
- PDDA-BC对MC-LR吸附具有很高的选择性,其性能优于传统的吸附剂.
- 在几分钟内实现98%的MC-LR捕获 (200μg/L),即使在复杂的水矩阵中.
- DFT计算证实了静电相互作用和π-π堆叠是主要的吸附驱动因素.
- 综合系统显示通过吸附生物降解有效地可持续地去除MC-LR.
结论:
- 在生物过中,PDDA-BC复合物是选择性MC-LR固定化的有希望的材料.
- 综合吸附-生物降解方法为在饮用水处理中去除MC-LR提供了高效和可持续的解决方案.
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