Soil geochemistry and digestive solubilization control mercury bioaccumulation in the earthworm Pheretima guillemi | |
Dang, Fei1; Zhao, Jie1,2; Greenfield, Ben K.3; Zhong, Huan4; Wang, Yujun1; Yang, Zhousheng2; Zhou, Dongmei1 | |
刊名 | JOURNAL OF HAZARDOUS MATERIALS
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2015-07-15 | |
卷号 | 292页码:44-51 |
关键词 | Methylmercury Earthworm (Pheretima guillemi) Total organic carbon Digestive solubilization |
ISSN号 | 0304-3894 |
DOI | 10.1016/j.jhazmat.2015.03.012 |
通讯作者 | Zhou, Dongmei(dmzhou@issas.as.ac.cn) |
英文摘要 | Mercury presents a potential risk to soil organisms, yet our understanding of mercury bioaccumulation in soil dwelling organisms is limited. The influence of soil geochemistry and digestive processes on both methylmercury (MeHg) and total mercury (THg) bioavailability to earthworms (Pheretima guillemi) was evaluated in this study. Earthworms were exposed to six mercury-contaminated soils with geochemically contrasting properties for 36 days, and digestive fluid was concurrently collected to solubilize soil-associated mercury. Bioaccumulation factors were 7.5-31.0 and 0.2-0.6 for MeHg and THg, respectively, and MeHg accounted for 17-58% of THg in earthworm. THg and MeHg measured in soils and earthworms were negatively associated with soil total organic carbon (TOC). Earthworm THg and MeHg also increased with increasing soil pH. The proportion of MeHg and THg released into the digestive fluid (digestive solubilizable mercury, DSM) was 8.3-18.1% and 0.4-1.3%, respectively. The greater solubilization of MeHg by digestive fluid than CaCl2, together with a biokinetic model-based estimate of dietary MeHg uptake, indicated the importance of soil ingestion for MeHg bioaccumulation in earthworms. (C) 2015 Elsevier B.V. All rights reserved. |
收录类别 | SCI |
WOS关键词 | FIELD-CONTAMINATED SOILS ; EISENIA-FOETIDA ; METHYL MERCURY ; LUMBRICUS-TERRESTRIS ; BENTHIC INVERTEBRATE ; FEEDING-BEHAVIOR ; FOREST SOILS ; BIOAVAILABILITY ; METHYLMERCURY ; SEDIMENTS |
WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
WOS类目 | Engineering, Environmental ; Engineering, Civil ; Environmental Sciences |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000353740500006 |
内容类型 | 期刊论文 |
URI标识 | http://www.corc.org.cn/handle/1471x/2558387 |
专题 | 南京土壤研究所 |
通讯作者 | Zhou, Dongmei |
作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Anhui Normal Univ, Coll Environm Sci & Engn, Wuhu 241003, Peoples R China 3.Univ Calif Berkeley, Dept Environm Hlth Sci, Berkeley, CA 94720 USA 4.Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resources Reuse, Nanjing 210023, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Dang, Fei,Zhao, Jie,Greenfield, Ben K.,et al. Soil geochemistry and digestive solubilization control mercury bioaccumulation in the earthworm Pheretima guillemi[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,292:44-51. |
APA | Dang, Fei.,Zhao, Jie.,Greenfield, Ben K..,Zhong, Huan.,Wang, Yujun.,...&Zhou, Dongmei.(2015).Soil geochemistry and digestive solubilization control mercury bioaccumulation in the earthworm Pheretima guillemi.JOURNAL OF HAZARDOUS MATERIALS,292,44-51. |
MLA | Dang, Fei,et al."Soil geochemistry and digestive solubilization control mercury bioaccumulation in the earthworm Pheretima guillemi".JOURNAL OF HAZARDOUS MATERIALS 292(2015):44-51. |
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