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Báo cáo " Distribution of Arsenic, Copper, Lead, Zinc elements in water and soils of sulfur deposits in the North West of Hanoi "

The quantitative distribution of As, Cu, Pb, Zn elements in water and soils around Giáp Lai and Minh Quang sulfur deposits is presented in this work. The preliminary results delineate the following: i) The content of As in water is quite low and is below the polluted limit. The soils was symptomatic of pollution by As at low level. ii) The contents of Cu and Zn are higher than that of Pb, especially in some localities, Cu and Zn contents are over the permissible threshold of the surface water quality and form high anomalies | VNU Journal of Science Earth Sciences 25 2009 91-97 Distribution of Arsenic Copper Lead Zinc elements in water and soils of sulfur deposits in the North West of Hanoi Dang Mai Nguyen Van Vuong Nguyen Trong Ngu College of Science VNU Received 02 January 2009 received in revised form 3 February 2009 Abstract. The quantitative distribution of As Cu Pb Zn elements in water and soils around Giáp Lai and Minh Quang sulfur deposits is presented in this work. The preliminary results delineate the following i The content of As in water is quite low and is below the polluted limit. The soils was symptomatic of pollution by As at low level ii The contents of Cu and Zn are higher than that of Pb especially in some localities Cu and Zn contents are over the permissible threshold of the surface water quality and form high anomalies iii The content of As Cu Zn Pb in the Red River s water is higher than that in the exploitation area. This reveals that the arsenic and other heavy metals presented in the Red River s water may come from other sources located in the upper course of the river . Keywords Arsenic Copper Zinc Lead Soils Sulfur Deposits Pollution Hanoi area. 1. Introduction Currently its exists different opinions on the causes of heavy metallic pollution especially arsenic in the water of the Bac Bo delta plain. Some authors tentatively conclude that the arsenic mangan and ammonium pollution of the underground water is caused by household industrial and agricultural waste and water overexploitation 3 7 . Some others emphasized the natural causes of the pollution. According to Nguyễn Văn Đản and Nguyễn Thị Dung components of the Quaternary sediments in the study area may be the source produced contaminated elements 5 . Phạm Hùng Việt et Corresponding author. Tel. 84-4-38544632. al. argue that the existence of high content of Arsenic in underground water of the Bac Bo delta plain may be related to the erosion and weathering processes leading to the enrichment of arsenic in .