阻断存量汞风险以推进可持续农业发展  

Mitigate risk of“old mercury”for sustainable agriculture

作　　者：钟寰[1] 宁文婧 唐雯莉 ZHONG Huan;NING Wenjing;TANG Wenli(School of Environment,Nanjing University,State Key Laboratory of Pollution Control and Resource Reuse,Nanjing 210023,China)

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210023

出　　处：《农业环境科学学报》2025年第1期1-5,共5页Journal of Agro-Environment Science

摘　　要：环境中大量存在的惰性存量汞在人为扰动下可发生再活化,进而转化为具有强烈神经毒性的甲基汞并进入食物链,引发生态与健康风险。该过程的重要驱动力源自农业活动中碳、硫等大量元素的持续输入,这些输入显著扰动了微生物介导的大量元素-痕量元素耦合循环,推动了存量汞的再活化与甲基化,促进了环境中甲基汞的生成。以“大量元素-微生物-汞”(Macroelement-Microbe-Mercurynexus,3M)交互作用机制为基础建立基于自然的解决方案,旨在精准调节多元素循环、定向调控存量汞转化以有效阻断存量汞风险,将为现行以汞排放削减为核心的全球汞风险控制策略提供有力补充,也为推进可持续农业发展、保障居民健康提供关键支撑。“Old mercury”in the environment,characterized by long aging and low bioavailability,may be remobilized under anthropogenic perturbations and transformed into the potent neurotoxin methylmercury that enters human food web,posing ecological and health risks.An important driver of such processes is the continuous input of macroelements such as carbon and sulfur resulting from agricultural activities,which alters the microbe-mediated coupled macro-and trace-element cycle,facilitating the remobilization of“old mercury”and thus mercury methylation,thereby contributing to methylmercury formation in nature.The establishment of nature-based solutions,based on the uncovered“Macroelement-Microbe-Mercury nexus”(TriM),to regulate the multi-element cycle and hence mercury transformation to effectively mitigate the risk of“old mercury”will provide a powerful complement to the current global strategy of mercury mitigation centered on reducing mercury emissions.These efforts would foster sustainable agriculture and safeguard global population.

关 键 词：甲基汞 存量汞活化 元素耦合循环 食品安全 可持续发展 

分 类 号：X71[环境科学与工程—环境工程]