Construction of CdS-Tetrahymena thermophila hybrid system by efficient cadmium adsorption for dye removal under light irradiation.
Construction of CdS-Tetrahymena thermophila hybrid system by efficient cadmium adsorption for dye removal under light irradiation.
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DOI：
10.1016/j.jhazmat.2022.129683
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发表时间：
2022-07
影响因子：
13.6
通讯作者：
Jia-Wei Tu;Tian Li;Zihan Gao;Jie Xiong;W. Miao
中科院分区：
文献类型：
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作者：
Jia-Wei Tu;Tian Li;Zihan Gao;Jie Xiong;W. Miao
工业排放的重金属和染料造成的水污染已经成为一个世界性的问题。这些污染物很难被生物降解。即使在低浓度的情况下，它们也是有毒的，最终威胁到人类健康。本文在利用单细胞纤毛虫四膜虫富集水中重金属Cd~(2+)的同时，建立了纳米硫化镉-嗜热四膜虫杂化体系(CDS-T)。开发了用于光照射下修复染料污染的嗜热菌)。对富集和去除Cd~(2+)的条件进行了研究。嗜热菌，构建高效的CDS-T。嗜热菌和CDS-T对刚果红的脱色。对嗜热菌进行了调查。在半胱氨酸乙酯存在下，对Cd~(2+)的去除效果较好。在低浓度Cd~(2+)浓度为1 mg时，对L−_1的嗜热率为94%。当−−1中Cd~(2+)浓度为80 mg时，嗜热菌Cd~(2+)可达43 mg·g~(-1)−1。在光照下，用0.1 g L−_1构建的CDS-T，60分钟后脱色率达95%。本研究为有效去除水中的Cd~(2+)提供了新的思路。嗜热性构建CDS-T。嗜热菌，并用它来修复环境中的染料污染。
The water pollution caused by heavy metals and dyes emitted by industries has become a worldwide problem. These pollutants are difficult to be biodegraded. Even at low concentrations, they are toxic and at last threaten human health. Herein, while using Tetrahymena thermophila,a single-celled ciliate protozoa, to enrich and remove the heavy metal Cd2+from water, CdS nanoparticle-Tetrahymena thermophilahybrid system (CdS-T. thermophila) for dye pollution remediation under light irradiation was developed. The conditions of Cd2+enrichment and removal byT. thermophila, construction of efficient CdS-T. thermophila, and decolorization of Congo red using CdS-T. thermophilawere investigated. In the presence of cysteine ethyl ester, the removal rate of Cd2+byT. thermophilawas 94% at low Cd2+concentration of 1 mg L−1. The adsorption capacity ofT. thermophilato Cd2+reached 43 mg g−1at Cd2+concentration of 80 mg L−1. Using 0.1 g L−1constructed CdS-T.thermophila, the decolorization rate of 50 mg L−1Congo red solution reached 95% in 60 min under light irradiation. This study provides a new insight to effective removing Cd2+from water byT. thermophilato construct the CdS-T. thermophilaand using it to remediate dye pollution in the environment.