Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Datun Road, A 11, Beijing, 100101, People's Republic of China,
Environ Sci Pollut Res Int. 2015 Sep;22(18):14248-57. doi: 10.1007/s11356-015-4650-0. Epub 2015 May 15.
Dissolved trace elements and physiochemical parameters were analyzed to investigate their physicochemical characteristics and identify their sources at 12 sampling sites of the Jinshui River in the South Qinling Mts., China from October 2006 to November 2008. The two-factor ANOVA indicated significant temporal variations of the dissolved Cu, Fe, Sr, Si, and V (p < 0.001 or p < 0.05). With the exception of Sr (p < 0.001), no significant spatial variations were found. Distributions and concentrations of the dissolved trace elements displayed that dissolved Cu, Fe, Sr, Si, V, and Cr were originated from chemical weathering and leaching from the soil and bedrock. Dissolved Cu, Fe, Sr, As, and Si were also from anthropogenic inputs (farming and domestic effluents). Correlation and regression analysis showed that the chemical and physical processes of dissolved Cu was influenced by water temperature and dissolved oxygen (DO) to some degree. Dissolved Fe and Sr were affected by colloid destabilization or sedimentary inputs. Concentrations of dissolved Si were slightly controlled by biological uptake. Principal component analysis confirmed that Fe, Sr, and V resulted from domestic effluents, agricultural runoff, and confluence, whereas As, Cu, and Si were from agricultural activities, and Cr and Zn through natural processes. The research results provide a reference for ecological restoration and protection of the river environment in the Qinling Mts., China.
本研究于 2006 年 10 月至 2008 年 11 月在秦岭山区金水河流域的 12 个采样点采集水样，分析了溶解态微量元素和理化参数，以探讨其理化特征，并确定其来源。双因素方差分析表明，溶解态 Cu、Fe、Sr、Si 和 V 的时间变化具有显著意义（p<0.001 或 p<0.05）。除 Sr（p<0.001）外，未发现空间变化具有显著意义。溶解态微量元素的分布和浓度表明，溶解态 Cu、Fe、Sr、Si、V 和 Cr 主要来源于化学风化和土壤及基岩的淋溶作用。溶解态 Cu、Fe、Sr、As 和 Si 也来自人为输入（农业和生活污水）。相关和回归分析表明，溶解态 Cu 的化学和物理过程在一定程度上受到水温及溶解氧（DO）的影响。溶解态 Fe 和 Sr 受胶体失稳或沉积物输入的影响。溶解态 Si 的浓度受生物吸收的轻微控制。主成分分析证实，Fe、Sr 和 V 主要来自生活污水、农业径流和汇流，而 As、Cu 和 Si 主要来自农业活动，Cr 和 Zn 主要通过自然过程产生。研究结果为秦岭山区河流生态恢复和保护提供了参考。
