将生理化学吸附与生物降解相结合,以提高水中的微囊素-LR的去除
Shengyin Tang1, Lixun Zhang1, Haoxin Zhu2
1Department of Civil and Environmental Engineering, University of California, Irvine, 92697, United States; Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
这项研究表明,将木质吸附剂与Sphingopyxis sp. 结合在一起. m6细菌可以有效地去除诸如microcystin-LR (MC-LR) 这样的毒素. 松木活性炭被证明是最有效的,增强了先进水处理的吸附和生物降解.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 微生物学 微生物学
背景情况:
- 藻类开花会产生有害的毒素,如微素-LR (MC-LR),对水安全构成风险.
- 传统的水处理方法难以有效和完全去除这些持久毒素.
- 开发用于有效清除毒素的创新技术对于公共卫生和环境保护至关重要.
研究的目的:
- 通过合吸附-生物降解过程来研究MC-LR去除的协同机制.
- 评估各种木质碳酸性吸附剂的性能,有或没有MC-LR降解细菌Sphingopyxis sp. m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m.m.m.m.m.m.m.m.m.m.m.m.m.m.
- 确定影响MC-LR物理吸附和生物降解的关键吸附性质.
主要方法:
- 使用八种类型的木质碳酸吸附剂进行了批量实验,有和没有Sphingopyxis sp. m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m6.m.m.m.m.m.m.m.m.m.m.m.m.m.m.
- 在纯吸附和合吸附-生物降解条件下监测了MC-LR去除效率.
- 使用差异分区分析来确定吸附性质 (例如孔隙结构,功能组) 和细菌存在对MC-LR去除的贡献.
主要成果:
- 所有测试的吸附剂都显示出显著的MC-LR吸附 (40%至近100%).
- 增加了Sphingopyxis sp. 的添加. m6细菌显著增强了MC-LR的去除 (>90%在大多数情况下),克服了吸附能力的限制.
- 介质孔结构,电导率,极性和总功能群对MC-LR吸附至关重要,而孔结构对细菌生长和降解效率至关重要.
结论:
- 使用Sphingopyxis sp.进行合吸附-生物降解. m6为MC-LR去除提供了一个高度有效的策略,特别是对于具有较低生理化学吸附能力的吸附剂.
- 基于松木的碳酸吸附剂,特别是松木活性炭,由于有利的孔隙结构,功能组和电导率,表现出卓越的性能.
- 这项研究为选择和修改材料提供了机理理解和理论基础,以便在水处理中实际应用合吸附-生物降解.
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