Title: Biochemical responses of freshwater microalgae Chlorella sorokiniana to combined exposure of Zn(II) and estrone with simultaneous pollutants removal

Author(s): Liu, DY (Liu, Dongyang); Wang, HZ (Wang, Hanzhi); Teng, Y (Teng, Yue); Wu, QR (Wu, Qirui); Tang, CM (Tang, Chunming); Gao, XX (Gao, Xinxin); Chen, CQ (Chen, Chaoqi); Zhu, LD (Zhu, Liandong)

Source: JOURNAL OF ENVIRONMENTAL MANAGEMENT Volume: 348 Article Number: 119392 DOI: 10.1016/j.jenvman.2023.119392 Published: DEC 15 2023

Abstract: With the development of livestock industry, contaminants such as divalent zinc ions (Zn (II)) and estrone are often simultaneously detected in livestock wastewater. Nevertheless, the combined toxicity of these two pollutants on microalgae is still unclear. Moreover, microalgae have the potential for biosorption and bioaccumulation of heavy metals and organic compounds. Thus, this study investigated the joint effects of Zn (II) and estrone on microalgae Chlorella sorokiniana, in terms of growth, photosynthetic activity and biomolecules, as well as pollutants removal by algae. Interestingly, a low Zn (II) concentration promoted C. sorokiniana growth and photosynthetic activity, while the high concentration experienced inhibition. As the increase of estrone concentration, chlorophyll a content increased continuously to resist the environmental stress. Concurrently, the secretion of extracellular polysaccharides and proteins by algae increased with exposure to Zn (II) and estrone, reducing toxicity of pollutants to microalgae. Reactive oxygen species and superoxide dismutase activity increased as the increase of pollutant concentration after 96 h cultivation, but high pollutant concentrations resulted in damage of cells, as proved by increased MDA content. Additionally, C. sorokiniana displayed remarkable removal efficiency for Zn (II) and estrone, reaching up to 86.14% and 84.96% respectively. The study provides insights into the biochemical responses of microalgae to pollutants and highlights the potential of microalgae in pollutants removal.

Author Keywords: Chlorella sorokiniana; Zinc; Estrone; Promotion effect; Biochemical responses; Bioremediation

KeyWords Plus: PIGGERY WASTE-WATER; MICROCYSTIS-AERUGINOSA; TOXICITY; ZINC; 17-BETA-ESTRADIOL; PHOTOSYNTHESIS; DETOXIFICATION; VULGARIS; INSIGHTS; CADMIUM

Addresses: [Liu, Dongyang; Wang, Hanzhi; Teng, Yue; Wu, Qirui; Tang, Chunming; Gao, Xinxin; Chen, Chaoqi; Zhu, Liandong] Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm Bi, Wuhan 430079, Peoples R China.

[Liu, Dongyang; Wang, Hanzhi; Teng, Yue; Wu, Qirui; Tang, Chunming; Gao, Xinxin; Chen, Chaoqi; Zhu, Liandong] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Zhu, Liandong] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

Corresponding Address: Chen, CQ; Zhu, LD (corresponding author), Wuhan Univ, Sch Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm Bi, Wuhan 430079, Peoples R China.

Chen, CQ; Zhu, LD (corresponding author), Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

邮箱地址：chenchaoqi@whu.edu.cn; ldzhu@whu.edu.cn

影响因子：8.7