聚乙烯醇
生物反应器
反硝化
化学
硝酸盐
核化学
生物材料
废水
环境化学
色谱法
环境工程
有机化学
氮气
环境科学
作者
Junfeng Su,Yi Bai,Tinglin Huang,Li Wei,Chunyu Gao,Qiong Wen
出处
期刊:Water Research
[Elsevier]
日期:2020-01-01
卷期号:168: 115152-115152
被引量:68
标识
DOI:10.1016/j.watres.2019.115152
摘要
The co-existence of multiple pollutants in wastewater such as nitrate and heavy metal, is of high concern due to the potential environmental impact. In this study, a novel biomaterial [email protected]3O4/PVA was synthesized as a multifunctional bacteria immobilized carrier, to enhance simultaneous denitrification, Cd(II) and Mn(II) removal efficiency in bioreactor environments. The morphology and main components of the [email protected]3O4/PVA material were characterized by SEM and XRD. Using [email protected]3O4/PVA as a carrier, the maximum removal efficiencies for nitrate (0.207 mg L−1·h−1), Mn(II) (90.98%) and Cd(II) (98.78%) were increased by 27.05%, 30.27%, and 16.48%, respectively, compared to in the absence of [email protected]3O4/PVA. Regeneration experiments were performed, demonstrating the excellent stability and reusability of the [email protected]3O4/PVA material. Furthermore, effects of key factors were investigated on the performance of the [email protected]3O4/PVA bioreactor in simultaneous denitrification, Mn(II) and Cd(II) removal. Experimental results indicate that the highest nitrate, Mn(II) and Cd(II) removal efficiencies were obtained under the conditions of HRT of 10 h, initial Mn(II) concentration of 40 mg/L and initial Cd(II) concentration of 10 mg/L. Gas chromatography analysis indicated that N2 was the mainly final gaseous product. Moreover, the bioreactor community diversity was markedly influenced by the initial concentration of Cd(II) and Pseudomonas sp. H117 played a primary role in the process of simultaneous denitrification, Mn(II) and Cd(II) removal.
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