Department of Environmental Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Environ Monit Assess. 2013 Feb;185(2):1041-53. doi: 10.1007/s10661-012-2612-2. Epub 2012 Apr 3.
To study the status and source of aluminum (Al) contamination, a total of 21 sampling sites along six rivers near Xi'an City (Shaanxi province, China) were investigated during 2008-2010. The results indicated that the average concentration of total Al (Al(t)) in the six rivers increased by 1.6 times from 2008 to 2010. The spatial distribution of Al(t) concentrations in the rivers near Xi'an City was significantly different, ranged from 367 μg/L (Bahe River) to 1,978 μg/L (Taiping River). The Al(t) concentration was highest near an industrial area for pulp and paper-making (2,773 μg/L), where the Al level greatly exceeded the water quality criteria of both the USA (Criterion Continuous Concentration, 87 μg/L) and Canada (100 μg/L). The average concentration of inorganic monometric aluminum (Al(im)) was 72 μg/L which would pose threats to fishes and other aquatic lives in the rivers. The concentrations of exchangeable Al (Al(ex)) in the sediment of the Taiping River sampled were relatively high, making it to be an alternative explanation of increasing Al concentrations in the rivers near Xi'an City. Furthermore, an increasing Al level has been detected in the upstream watershed near Xi'an City in recent years, which might indicate another notable pollution source of Al.
为研究铝（Al）污染的现状和来源，于 2008-2010 年期间对西安市（陕西省）6 条河流附近的 21 个采样点进行了调查。结果表明，6 条河流中总铝（Al(t)）的平均浓度在 2008 年至 2010 年间增加了 1.6 倍。西安市附近河流中 Al(t)浓度的空间分布差异显著，范围从 367μg/L（灞河）到 1978μg/L（太平河）。造纸和纸浆工业地区附近的 Al(t)浓度最高（2773μg/L），该地区的 Al 水平大大超过了美国（标准连续浓度，87μg/L）和加拿大（100μg/L）的水质标准。无机单铝（Al(im)）的平均浓度为 72μg/L，这将对河流中的鱼类和其他水生生物构成威胁。取自太平河的沉积物中交换态 Al (Al(ex))的浓度相对较高，这可能是西安市附近河流中 Al 浓度增加的另一个解释。此外，近年来在西安市上游流域检测到 Al 水平不断上升，这可能表明另一个值得关注的 Al 污染源。
