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 thermophila hybrid system (CdS-T. thermophila) for dye pollution remediation under light irradiation was developed. The conditions of Cd²⁺ enrichment and adsorption by T. thermophila, construction of efficient CdS-T. thermophila, and decolorization of Congo red using CdS-T. thermophila were investigated. In the presence of cysteine ethyl ester, the removal rate of Cd²⁺ by T. thermophila was 94% at low Cd²⁺ concentration of 1 mg L^-1. The adsorption capacity of T. thermophila to Cd²⁺ reached 43 mg g^-1 at Cd²⁺ concentration of 80 mg L^-1. Using 0.1 g L^-1 constructed CdS-T. thermophila, the decolorization rate of 50 mg L^-1 Congo red solution reached 95% in 60 min under light irradiation. This study provides a new insight to effective removing Cd²⁺ from water by T. thermophila to construct the CdS-T. thermophila and using it to remediate dye pollution in the environment.

工业排放的重金属和染料造成的水污染已成为世界性难题。这些污染物很难被生物降解。即使在低浓度下，它们也是有毒的，并最终威胁到人类健康。在此，利用单细胞纤毛虫原生动物嗜热四膜虫富集和去除水中的重金属Cd ²⁺，开发了CdS纳米颗粒-嗜热四膜虫混合系统（CdS- T. thermophila）用于光照射下的染料污染修复. 嗜热菌对Cd ²⁺的富集和吸附条件, 高效CdS-嗜热菌的构建, 和使用 CdS- T. thermophila对刚果红的脱色进行了研究。在半胱氨酸乙酯存在下，在1 mg L ^{-1的低Cd 2+}浓度下，嗜热菌对Cd ²⁺的去除率为94% 。在Cd ²⁺浓度为80 mg L ^-1时，嗜热菌对Cd ²⁺的吸附量达到43 mg g ^-1。使用 0.1 g L ^-1构建 CdS- T。嗜热菌，脱色率50mg          L ^-1 刚果红溶液在光照下60分钟达到95% 。本研究为利用嗜热嗜热菌有效去除水中的Cd ^2+构建嗜热嗜热菌CdS-T.thermophila并利用它来修复环境中的染料污染提供了新的见解。