通过生物炭覆盖,有效地减少从沉积物中释放的和酸盐
Lecheng Wei1, Yajie Zhang1, Yutong Han1
1Institute of Environmental Pollution Control and Treatment, Zhejiang University, Hangzhou 310058, China.
The Science of the total environment
|July 24, 2023
概括
生物炭覆盖通过增强脱和anammox过程有效地减少了湖泊沉积物中酸盐- (NO3--N) 的释放. 子生物炭 (coBC) 显示出最佳性能,显著降低了NO3度和流量.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 生物地质化学生物地质化学
背景情况:
- 沉积物中的无机 (N) 是一个主要的水污染物.
- 生物炭可以吸附氨- (NH4+-N),但其对酸- (NO3--N) 释放的影响不太清楚.
研究的目的:
- 评估生物炭覆盖在减少湖泊沉积物中NO3释放的可行性.
- 研究生物炭影响循环的机制.
主要方法:
- 用三种生物炭 (子,藻类,过剩污泥) 化四个湖泊沉积物90天.
- 对度,释放流,微生物群落和与N相关的功能基因的分析.
- N同位素标记和外源性有机碳添加实验.
主要成果:
- 生物炭覆盖显著降低了总 (TN) 和NO3度.
- 子生物炭 (coBC) 覆盖率降低了NO-N释放流量63.6%.
- 生物炭的应用丰富了潜在的脱剂,并增加了N相关基因的丰富性,提高了53.5-83.4%的脱和anammox率.
结论:
- 生物炭覆盖是一个有效的策略,以减轻NO3从沉积物中释放的N.
- 生物炭通过调节有机物生物可用性和修改沉积物微环境 (DOC,TN,pH) 来增强脱和anammox过程.
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