Assessment of metal mobility in sediment, commercial fish accumulation and impact on human health risk in a large shallow plateau lake in southwest of China

被引：45

作者：

Qian, Yu ^{[1
]}

Cheng, Changlei ^{[2
]}

Feng, Huan ^{[3
]}

Hong, Zijin ^{[1
]}

Zhu, Qingzhi ^{[4
]}

Kolencik, Marek ^{[5
]}

Chang, Xuexiu ^{[1
]}

机构：

[1] Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China

[2] Yunnan Prov Nonferrous Geol Bur, Anal & Measurements Ctr, Kunming 650051, Yunnan, Peoples R China

[3] Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA

[4] SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA

[5] Slovak Univ Agr, Fac Agrobiol & Food Resources, Dept Soil Sci & Geol, Nitra 94976, Slovakia

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2020年 / 194卷

基金：

中国国家自然科学基金;

关键词：

Fish metal accumulation; Heavy metal; Health risk assessment; Mobility; Sediment; Sequential extraction; FRESH-WATER LAKES; SEQUENTIAL EXTRACTION PROCEDURE; HEAVY-METALS; DIANCHI LAKE; TRACE-ELEMENTS; FOOD-WEB; SPATIAL-DISTRIBUTION; SURFACE-WATER; URBAN RIVER; MERCURY;

D O I：

10.1016/j.ecoenv.2020.110346

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sediment heavy metal pollution in the Dianchi Lake has been a long-term environmental problem of concern. This study investigated the lake sediment heavy metal contamination level, mobility, commercial fish metal accumulation and its impact on human health. The results show high As, Hg and Cd concentration in the sediment, while Pb and Cr contamination are insignificant. Sediment sequential extraction analysis shows that Hg in sediment has the highest portion of mobile fraction, followed by As, while the portion of mobile fractions of Cd, Pb and Cr in sediment is very low. The high concentrations of Hg and As in surface water and porewater were consistent with the chemical fraction composition of the two elements in sediment. Three major commercial fish species, Culterichthys erythropterus, Carassius auratus and Hypophthalmichthys molitrix, were collected for analysis of metal concentrations in their muscles. Among the same size of fish, C. auratus has the highest As concentration due to its bottom habitat and omnivorous feeding habits. On the other hand, C. erythropterus has the highest Hg concentration due to its relatively high trophic level position. The average THQ value of metals in fish tissue decrease in the order of As > Hg > Pb > Cd > Cr and the total THQ of average metal concentration in fish species decreased in the order of C. auratus > C. erythropterus > H. molitrix. Both THQ and total THQ is below 1, suggested no non-carcinogenic human health risk of fish consumption. However, TR of As in C. auratus was above 1.00E-04 threshold value, indicated potential carcinogenic human health risk. The results from this study indicate that although moderately to heavily contamination of Hg, As, and Cd occurred in Dianchi Lake sediment, only Hg and As tend to transport to surface water and accumulate in commercial fish due to their higher mobility in sediment.

引用

页数：11

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