Zhou Suhua, Ye Hengpeng, Li Mingjian, Xiong Peisheng, Du Dongyun, Wang Jingwen
Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, China.
South-Central University for Nationalities.
Zhonghua Liu Xing Bing Xue Za Zhi. 2015 Jun;36(6):556-60.
To understand the variation of arsenic concentration in underground water at the endemic arsenic poison disease area of Jianghan Plain so as to better understand the spatial distribution of high arsenic groundwater, hydro-chemical evolution and source of arsenic in this region.
Thirty underground water samples were collected respectively around 3 km radius of the two houses where arsenic poisoning patients lived, in Xiantao and Honghu. Sediment cores of three drillings were collected as well. Both paired t-test or paired Wilcoxon Signed Ranking Test were used to compare the arsenic concentration of water.
The arsenic concentration in 2011-2012 appeared lower than that in 2006-2007 at the Nanhong village of Xiantao (t = 4.645 3, P < 0.000 1), but was higher (S = -150, P < 0.000 1) in the Yaohe village of Honghu. The pH value showed weak acidity with Eh as weak oxidated. Positive correlations were observed between arsenic concentration and Cl, HCO3(-), Fe, Mn. However, negative correlations were found between As and SO4(2-), NO3(-). The range of arsenic content in the sediment was 1.500 mg/kg to 17.289 mg/kg. The maximum arsenic content existed in the soil layer, while the minimum arsenic content existed in the sand layer.
The concentration of arsenic varied widely with time and space at endemic arsenic poison disease area of Jianghan Plain. Characteristics of these water chemicals showed significant differences, when compared to the groundwater from Datong Basin, Shanxi Shanyin and Hetao Plain of Inner Mongolia, which presented a typical environment with high arsenic contents in the groundwater. The arsenic content in the sediment samples seemed related to the lithologic structure.
了解江汉平原地方性砷中毒病区地下水中砷浓度的变化情况，以便更好地掌握该地区高砷地下水的空间分布、水化学演化及砷的来源。
分别在仙桃和洪湖砷中毒患者居住的两户人家半径约3公里范围内采集30份地下水样本，同时采集3个钻孔的沉积物岩芯。采用配对t检验或配对Wilcoxon符号秩检验比较水样中的砷浓度。
仙桃南洪村2011 - 2012年的砷浓度低于2006 - 2007年（t = 4.645 3，P < 0.000 1），但洪湖姚河村的砷浓度更高（S = -150，P < 0.000 1）。pH值呈弱酸性，氧化还原电位呈弱氧化性。砷浓度与Cl、HCO3(-)、Fe、Mn呈正相关，而与As和SO4(2-)、NO3(-)呈负相关。沉积物中砷含量范围为1.500 mg/kg至17.289 mg/kg。砷含量最高值存在于土壤层，最低值存在于砂层。
江汉平原地方性砷中毒病区的砷浓度随时间和空间变化差异较大。与山西山阴大同盆地和内蒙古河套平原典型高砷地下水环境的地下水相比，这些水化学特征存在显著差异。沉积物样本中的砷含量似乎与岩性结构有关。
