Toxicity of coal fly ash and coal gangue leachate to Daphnia magna: Focusing on typical heavy metals

被引：35

作者：

Peng, Weihua ^{[1
]}

Liu, Yingying ^{[2
]}

Lin, Manli ^{[1
]}

Liu, Yan ^{[3
]}

Zhu, Cheng ^{[4
]}

Sun, Linhua ^{[1
]}

Gui, Herong ^{[1
]}

机构：

[1] Suzhou Univ, Natl Engn Res Ctr Coal Mine Water Hazard Controll, Sch Resources & Civil Engn, Suzhou 234000, Peoples R China

[2] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, 19 Xinjiekouwai St, Beijing 100875, Peoples R China

[3] Donghua Univ, Coll Chem Chem Engn & Biotechnol, Shanghai 201620, Peoples R China

[4] China Jiliang Univ, Coll Life Sci, Key Lab Marine Food Qual & Hazard Controlling Tec, Hangzhou 310018, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2022年 / 330卷

关键词：

fly ash; Coal gangue; Heavy metals; Toxicity; Daphnia magna; OXIDATIVE STRESS; TRACE-ELEMENTS; WEATHERING TRANSFORMATIONS; COMBUSTION RESIDUALS; ENVIRONMENTAL SAFETY; DISSOLVED ELEMENTS; PRISTINE GRAPHENE; LEACHING BEHAVIOR; CADMIUM; WASTE;

D O I：

10.1016/j.jclepro.2021.129946

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To identify potential toxicity of heavy metals (HMs) in coal fly ash (FA) and coal gangue (CG), this study measured Cd, Cr, Cu, Zn, Pb and Ni in two FAs and two CGs, and assessed their leachates' toxicity to Daphnia magna (D. magna). The results showed that the selected HMs in material and their leachates were low. However, under simplified Elendt M7 medium exposure system, the added leachates inhibited the survival and reproduction of D. magna. The HMs in D. magna increased as leachate increased, and D. magna mortality increased as the HMs in D. magna increased overall. The Cr and Ni in D. magna both showed significant linear positive correlation with the mortality. These indicated that HMs in leachate dilutions were important reason to inhibit D. magna. Moreover, the HMs in leachate also changed the biomarkers and caused oxidative stress in D. magna. Antioxidant system and cell structure of D. magna were further destroyed as leachates increased. The leachates' inhabitation (mortality and living offspring) to D. magna depended on the properties of FA and CG, and the chemical composition of their leachates. Element level (e.g., C, S and N) and their chemical speciation (e.g., S2and NH4+) likely impacted the leaching rate and toxicity of HMs.

引用

页数：11

共 63 条

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