Mercury in rice paddy fields and how does some agricultural activities affect the translocation and transformation of mercury - A critical review

被引：55

作者：

Tang, Zhenya ^{[1
,3
]}

Fan, Fangling ^{[2
]}

Deng, Shiping ^{[5
]}

Wang, Dingyong ^{[3
,4
]}

机构：

[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, Kunming, Yunnan, Peoples R China

[2] Yunnan Normal Univ, Sch Energy & Environm Sci, Kunming, Yunnan, Peoples R China

[3] Southwest Univ, Interdisciplinary Res Ctr Agr Green Dev Yangtze R, Chongqing, Peoples R China

[4] Southwest Univ, Coll Resources & Environm, State Cultivat Base Ecoagr Southwest Mt Land, Chongqing, Peoples R China

[5] Oklahoma State Univ, Dept Plant & Soil Sci, Stillwater, OK 74078 USA

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2020年 / 202卷

关键词：

Methylmercury; Rice plant; Farming activities; Bioaccumulation; ORYZA-SATIVA-L; DISSOLVED ORGANIC-CARBON; LONG-TERM NITROGEN; HG MINING AREA; METHYLMERCURY ACCUMULATION; GUIZHOU PROVINCE; INORGANIC MERCURY; METHYL MERCURY; SOIL ACIDIFICATION; IRON PLAQUE;

D O I：

10.1016/j.ecoenv.2020.110950

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Human exposure to methylmercury (MeHg) through rice consumption is raising health concerns. It has long been recognized that MeHg found in rice grain predominately originated from paddy soil. Anaerobic conditions in paddy fields promote Hg methylation, potentially leading to high MeHg concentrations in rice grain. Understanding the transformation and migration of Hg in the rice paddy system, as well as the effects of farming activities, are keys to assessing risks and developing potential mitigation strategies. Therefore, this review examines the current state of knowledge on: 1) sources of Hg in paddy fields; 2) how MeHg and inorganic Hg (IHg) are transformed (including abiotic and biotic processes); 3) how IHg and MeHg enter and translocate in rice plants; and 4) how regular farming activities (including the application of fertilizer, cultivation methods, choice of cultivar), affect Hg cycling in the paddy field system. Current issues and controversies on Hg transformation and migration in the paddy field system are also discussed.

引用

页数：12