Inhibitory effects of Skeletonema costatum on mercury methylation by Geobacter sulfurreducens PCA

Ding, Ling-Yun1; He, Ning-Ning1; Yang, Sai1; Zhang, Li-Juan1; Liang, Peng5; Wu, Sheng-Chun5; Wong, Ming Hung2,3,4; Tao, Hu-Chun1

2019-02

10.1016/j.chemosphere.2018.10.121

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

Algae and mercury (Hg) are ubiquitous in marine environments. In this study, we investigated the effects of a typical marine algae of diatom Skeletonema costatum on Hg methylation by an iron-reducing bacterium of Geobacter sulfurreducens (G. sulfurreducens) PCA. In the absence of Skeletonema costatum, the bacterial MeHg production rate maximized at 104.06 +/- 11.7 ng L-1 h(-1) with a high Hg level, while the highest methylation efficiency was achieved at a low Hg concentration. The existence of Skeletonema costatum greatly inhibited the capability of G. sulfurreducens PCA to methylate Hg. With the increase in algal biomass, there was a significant mitigation of MeHg formation and Hg-0 release, leaving a considerable proportion of immobilized Hg2+ species (up to 47%) associated with algal cell materials. These results suggest that marine algae are crucial in determining the bioavailability of Hg contaminants and the methylating potential of G. sulfurreducens PCA. (C) 2018 Elsevier Ltd. All rights reserved.

Mercury Methylation Algae G. sulfurreducens PCA

SCI ; EI

英语

其他

China Postdoctoral Science Foundation[2018M631267]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000451494600020

PERGAMON-ELSEVIER SCIENCE LTD

20184506050026

Alkylation ; Biochemistry ; Marine pollution ; Mercury (metal) ; Methylation

Water Pollution:453 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Operations:802.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Peking Univ, Sch Environm & Energy, Key Lab Heavy Met Pollut Control & Reutilizat, Shenzhen Grad Sch, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, State Environm Protect Key Lab Integrated Water G, Shenzhen 518055, Guangdong, Peoples R China
4.Educ Univ Hong Kong, Dept Sci & Environm Studies, CHEER, Tai Po, Hong Kong, Peoples R China
5.Zhejiang Agr & Forestry Univ, Sch Environm & Resource Sci, Linan 311300, Zhejiang, Peoples R China

Ding, Ling-Yun,He, Ning-Ning,Yang, Sai,et al. Inhibitory effects of Skeletonema costatum on mercury methylation by Geobacter sulfurreducens PCA[J]. CHEMOSPHERE,2019,216:179-185.

Ding, Ling-Yun.,He, Ning-Ning.,Yang, Sai.,Zhang, Li-Juan.,Liang, Peng.,...&Tao, Hu-Chun.(2019).Inhibitory effects of Skeletonema costatum on mercury methylation by Geobacter sulfurreducens PCA.CHEMOSPHERE,216,179-185.

Ding, Ling-Yun,et al."Inhibitory effects of Skeletonema costatum on mercury methylation by Geobacter sulfurreducens PCA".CHEMOSPHERE 216(2019):179-185.