Control of phosphorus release from sediment by the combined use of Elodea nuttallii, hydrous ferric oxide, zeolite and calcite: Efficiency, mechanism and response of bacterial communities

IF 5.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Xunxin Liu, Yanhui Zhan, Jianwei Lin
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Abstract

The effectiveness of Elodea nuttallii combined with a mixture of hydrous ferric oxide, zeolite and calcite (HZC) to reduce the internal loading of phosphorus (P) from sediment and its mechanism were studied, and the effect of Elodea nuttallii combined with HZC on the composition and function of the microbial communities in the surface sediment was also investigated. The results showed that the combination utilization of Elodea nuttallii and HZC can decrease the risk of phosphorus liberation from sediment to the overlying water, and the controlling efficiency of Elodea nuttallii combined with HZC was higher than that of Elodea nuttallii or HZC alone. The passivation of labile P measured by diffusive gradient in thin film device and mobile P played a crucial role in the control of internal P loading from sediment by the combined Elodea nuttallii + HZC treatment. HZC capping had a promoting effect on the growth of Elodea nuttallii. This was beneficial to the absorption of phosphorus from sediment by Elodea nuttallii. The combined application of Elodea nuttallii and HZC not only had a certain negative effect on the diversity of bacteria in the surface sediment, but also changed the microbial compositions of the surface sediment at the levels of phylum and genus. However, the microbial communities in the surface sediment still can perform good ecological function. The above results suggest that the combined application of Elodea nuttallii and HZC has a high potential in the management of internal P loading from sediment.

通过联合使用榆叶梅、水合氧化铁、沸石和方解石控制沉积物中磷的释放:效率、机制和细菌群落的反应
研究了裸冠菊与水合氧化铁、沸石和方解石混合物(HZC)结合使用降低沉积物内部磷负荷的效果及其机理,并探讨了裸冠菊与HZC结合使用对表层沉积物微生物群落组成和功能的影响。结果表明,结合使用裸冠菊和 HZC 可降低沉积物中磷向上层水体释放的风险,且结合使用裸冠菊和 HZC 的控制效率高于单独使用裸冠菊或 HZC。通过薄膜装置中的扩散梯度测得的可迁移磷和可移动磷的钝化作用,是Elodea nuttallii + HZC联合处理方法控制沉积物内部磷负荷的关键。HZC 覆蓋對鰻魚的生長有促進作用。这有利于裸冠菊吸收沉积物中的磷。Elodea nuttallii 和 HZC 的联合应用不仅对表层沉积物中细菌的多样性产生了一定的负面影响,而且在门和属的层面上改变了表层沉积物的微生物组成。但表层沉积物中的微生物群落仍能发挥良好的生态功能。上述结果表明,联合施用营养叶薄荷和 HZC 在治理沉积物内部 P 负荷方面具有很大的潜力。
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来源期刊
Journal of Environmental Sciences-china
Journal of Environmental Sciences-china 环境科学-环境科学
CiteScore
13.70
自引率
0.00%
发文量
6354
审稿时长
2.6 months
期刊介绍: The Journal of Environmental Sciences is an international journal started in 1989. The journal is devoted to publish original, peer-reviewed research papers on main aspects of environmental sciences, such as environmental chemistry, environmental biology, ecology, geosciences and environmental physics. Appropriate subjects include basic and applied research on atmospheric, terrestrial and aquatic environments, pollution control and abatement technology, conservation of natural resources, environmental health and toxicology. Announcements of international environmental science meetings and other recent information are also included.
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