在河河口沉积物中通过重金属促进脱过程
Ming Hongxia1, Zan Shuaijun2, Liu Jiwen3
1National Marine Environmental Monitoring Center, Dalian 116023, China; State Environmental Protection Key Laboratory of Coastal Ecosystem, Dalian 116023, China.
Marine pollution bulletin
|May 2, 2024
概括
铜,和等重金属与河口沉积物中的脱率有积极的相关性. 这表明重金属可能会增强有氧脱,并抵消高溶氧影响.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物地质化学生物地质化学
背景情况:
- 重金属离子在河口生物化中的作用尚不清楚.
- 生物化对于了解河口环境中的循环至关重要.
研究的目的:
- 研究重金属离子对化率和河河口沉积物中的酶基因丰度的影响.
- 分析重金属影响下的nirK脱细菌的社区结构.
主要方法:
- 量化的脱率和五个关键的脱酶基因 (narG,nirK,napA,norB,nosZ) 的丰富性.
- 分析了nirK无化细菌的社区结构.
- 重金属含量与脱参数和环境因素相关联.
主要成果:
- 在重金属含量 (Cu2+, Zn2+, Cr) 和脱率之间观察到显著的正相关性.
- 重金属也与napA和norB基因的丰富度有积极的相关性.
- 主要的非化细菌 (伪,菌,塞拉提亚) 对重金属污染表现出耐受性.
- 沉积物颗粒大小,酸盐,亚酸盐,Zn2+和Cd2+被确定为塑造无化社区的关键因素.
结论:
- 重金属可能会增强河口沉积物中的有氧脱.
- 重金属可以减轻大量溶解氧对脱的负面影响.
- 了解这些相互作用对于河口气循环管理至关重要.
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