ABSTRACT

Surficial sediment samples along the coastal area of the province Thai Binh in Vietnam have been collected and analysed by modified Tessier method for the mercury content. The mercury levels in these samples were found in the range between 0.12–3.79 mg/kg. Elevated concentrations were observed in some locations close to tidal marshes, large aquaculture productions or low-lying areas. The highest level of mercury was detected in a low-lying terrain near large aquaculture productions. The majority of the mercury species in all samples were witnessed in the fraction bound to organic matters. The predominance of this fraction is possibly associated with some misuses of mercurial fungicides by aqua farmers. These mercury species remain quite resistant in the sediments, thus posing a quite low risk for the surrounding ecological environment. Nevertheless, it is necessary to undertake further studies to evaluate the effect of this contamination on the food chain.

摘要

越南泰平省沿海地区的表层沉积物样本已被收集，并通过改进的Tessier方法对汞含量进行了分析。这些样品中的汞含量范围为0.12–3.79 mg / kg。在靠近潮汐沼泽，大型水产养殖产品或低洼地区的某些地方观察到浓度升高。在大型水产养殖产品附近的低洼地带发现了最高水平的汞。在所有样品中，大多数汞物种都以与有机物结合的部分见证。该部分的主要可能与水产养殖者滥用汞杀真菌剂有关。这些汞种类在沉积物中仍然具有很强的抵抗力，因此对周围生态环境的风险很小。