Li Yunfeng, Wan Weifeng, Song Jin, Wu Yaoguo, Xu Yanjuan, Zhang Maosheng
School of Environmental Science and Engineering, Chang'an University, Xi'an, China.
Bull Environ Contam Toxicol. 2009 Feb;82(2):234-8. doi: 10.1007/s00128-008-9608-1. Epub 2008 Nov 19.
This study investigated groundwater contamination in the Yuxi River Valley in northern Shaanxi Province, one of largest energy resource centers in China. Groundwater samples collected from 129 locations in the Yuxi River Valley area were analyzed and evaluated to establish the local groundwater quality zonings. Results indicate that groundwater in the Yuxi River Valley is contaminated, and the dominant contaminants in the groundwater are ammonium (NH(4)(+)) and nitrite (NO(2)(-)). Maximal concentration of NH(4)(+) was detected at 0.019 and 3.50 mg/L in the samples collected up-gradient and down-gradient, respectively, of the segment of Yuxi River that flows through Yulin City. Concentration of NO(2)(-) was detected at 0.0015 and 1.522 mg/L, respectively from the same samples. Zones I through IV, from non-polluted to seriously polluted, were identified for groundwater quality in the Yuxi River Valley. We attribute the groundwater contamination in the Yuxi River valley to sources in the Yulin township, presumably its wastewater discharge.
本研究调查了中国最大的能源资源中心之一——陕西省北部榆溪河流域的地下水污染情况。对从榆溪河流域地区129个地点采集的地下水样本进行了分析和评估，以确定当地的地下水质量分区。结果表明，榆溪河流域的地下水受到污染，地下水中的主要污染物是铵（NH₄⁺）和亚硝酸盐（NO₂⁻）。在流经榆林市的榆溪河段的上游和下游采集的样本中，NH₄⁺的最大浓度分别检测到0.019和3.50mg/L。同一样本中NO₂⁻的浓度分别检测到0.0015和1.522mg/L。确定了榆溪河流域地下水质量的I至IV区，从无污染到严重污染。我们将榆溪河流域的地下水污染归因于榆林镇的污染源，可能是其废水排放。
