
汞污染
Power plants are typically cast as the usual suspects of mercury contamination, since they emit mercury into the air, where it spreads globally.
由于发电站向大气中排放的汞会在全球范围内扩散,所以通常都被认为是造成汞污染的罪魁祸首。
But I was taking part in a Sierra Club–sponsored test for mercury contamination in people, and levels of the toxic metal can be detected through hair.
但我是在参加塞拉俱乐部赞助人对汞的污染测试的一部分,以及有毒金属含量可以通过头发检测。
The present situation of atmospheric mercury contamination and the development of several technologies of pre-treatment and analysis were introduced in this paper.
阐述了我国空气环境中汞污染的现状,介绍了几种空气环境中汞污染分析测试技术。
Activists, scientists, and the Japanese press have documented high levels of mercury contamination in Japan's dolphins.
积极分子、科学家和日本新闻出版界都已证明在日本海豚体内有高程度的汞污染。
The findings suggested that neurotoxic effects of environmental mercury contamination had been significantly represented after chronically ***tary exposure.
实验结果表明,实地环境汞污染粮食长期暴露后对大鼠表现出明显的神经毒性作用。
Now, Japan's dolphin hunters face a new, powerful opponent: mercury contamination.
现在日本的海豚捕猎者们面临着一个更严峻的挑战:汞污染。
Efficient environmental protection, UV light radiation, no mercury, mercury contamination.
高效环保,无紫外线,光辐射,没有汞,水银污染。
However, young children must limit their intake of fish due to mercury contamination.
但是,幼儿应当限制汞污染鱼类的摄入。
Fortunately, for a man, mercury contamination isn't considered a significant health risk — and my levels are still well below the point at which harm would likely occur.
幸运的是,一个男人,汞污染不被认为是严重的健康风险-我的水平远低于点时可能会发生危害仍。
The contamination of arsenic and mercury in foods were found not serious.
砷、汞在食品中的污染不严重。
Australian regulators documented salmonella and listeria contamination in Chinese food imports, and mercury and arsenic concentrations up to many times the legal limit.
澳大利亚当局在从中国进口的食品中发现了沙门氏菌及李斯特菌,水银及砷的浓度也大大超标。
Results showed that ecological distribution of both aerobic heterotrophic and mercury resistant, was closely related to the degree of contamination of water and sediment.
结果表明,好氧异养菌和抗汞细菌的生态分布与河水、底泥的污染程度有密切关系。
Contamination with heavy metal residues has occurred from seeds treated with fungicides or disinfectants containing mercury or arsenic, and subsequent use in feedstuffs.
重金属残留污染出现在用含汞或砷的杀真菌剂或消毒剂处理过的种子中,及后来的在饲料使用中。
Mercury is a highly toxic element and its contamination is widespread and occurs through a variety of nature and anthropogenic source.
汞被公认为自然界中的有毒元素,由于重金属的滥用使汞污染大大威胁着自然环境和人类的水源。
汞污染(Mercury Contamination)是指环境中汞元素及其化合物异常积累,对生态系统和人类健康构成威胁的现象。汞具有持久性、生物累积性和高毒性,尤其甲基汞能通过食物链放大,造成严重危害。
污染形式多样性
汞以元素汞(Hg⁰)、无机汞(如HgCl₂)和有机汞(如甲基汞CH₃Hg⁺)等形式存在。甲基汞因脂溶性强、生物富集率高,成为最危险的形态。工业排放(如氯碱生产)和自然释放(火山活动)是主要来源。
全球迁移性
汞蒸气可在大气中长距离传输,沉降到水域后经微生物转化为甲基汞。北极鱼类汞含量升高即因工业区汞排放的远程输送所致。
神经毒性效应
甲基汞可穿透血脑屏障和胎盘,损害中枢神经系统。典型案例为日本水俣病:当地居民食用受化工废水污染的鱼类后,出现运动障碍、感觉异常及胎儿畸形(来源:WHO《汞与健康》报告)。
生态链放大作用
浮游生物吸收甲基汞→小鱼捕食浮游生物→大型鱼类捕食小鱼,导致顶级捕食者(如金枪鱼、鲨鱼)体内汞浓度可达水质浓度的百万倍(来源:EPA鱼类消费指南)。
《水俣公约》管控
该全球条约要求缔约国限制含汞产品生产,淘汰汞法氯碱工艺,并控制燃煤电厂排放(来源:UNEP公约文本)。
暴露安全阈值
世界卫生组织建议成人每周耐受摄入量不超过1.6μg/kg体重,孕妇和儿童需更严格限制高汞鱼类摄入(来源:WHO环境健康标准)。
权威参考资料
(注:以上链接经核实为有效官方资源,访问日期2025年7月)
“Mercury contamination”指汞(水银)在环境或生物体中超出正常范围的蓄积或扩散,从而对生态和健康造成危害的现象。以下是详细解释:
汞(Mercury)的定义与特性
汞(化学符号Hg)是一种银白色液态金属,常温下易挥发。它具有毒性,尤其是甲基汞(有机汞)可通过食物链富集,引发神经系统损伤等健康问题。
污染(Contamination)的含义
“Contamination”指有害物质对空气、水体、土壤等介质的侵入,导致环境质量下降或生物体受损。在汞污染的语境中,污染源包括工业排放(如炼锌炉废渣)、化石燃料燃烧等。
汞污染的危害
治理与预防
国际公约《水俣公约》旨在控制汞的使用和排放,措施包括推广清洁能源、规范含汞废物处理等。
汞污染是涉及工业、环境和公共卫生的复杂问题,需通过源头控制与全球协作缓解。如需更全面的信息,可参考环境科学文献或相关国际组织报告。
set offtrolleyhonorresourceappareladmittedlypass for sb%2fsthBahamascenturiedearlhardgoodsIFAWintermingledLatinsloimologyrightmostscratchcardshroudingunmakeBrand Identityforest parktriaxial compression testwithout availahlfelditeCCITTdesmocytomaenterobiasiserbiumeugeninkidamycin