Key Research Institute of Yellow River Civilization and Sustainable Development of Henan University, Kaifeng, Henan, 475001, China.
College of Environment and Planning, Henan University, Kaifeng, 475001, China.
Environ Sci Pollut Res Int. 2017 Aug;24(23):19322-19337. doi: 10.1007/s11356-017-9480-9. Epub 2017 Jul 1.
Absorption characteristics of optically active substances, including non-algal particles, phytoplankton, and chromophoric dissolved organic matter (CDOM), were measured in conjunction with environmental factors in five rivers within the Liaohe River watershed. Spectral absorption of non-algal particles [a (λ)] was similar to that of total particles for most samples, suggesting that the absorption of the total particles [a (λ)] was dominated by a (λ). The CDOM absorption spectra [a (λ)] of West Liaohe and Taizihe rivers were easily distinguished from those of Hunhe, Liaohe, and East Liaohe rivers. Redundancy analysis indicated that absorption by optically active substances and anthropogenic nutrient disturbances probably resulted in the diversity of water quality parameters. The environmental variables including dissolved organic carbon, total alkalinity (TAlk), and total nitrogen (TN) had a significant correlation with CDOM absorption at 440 nm [a (440)]. There was almost no correlation between a (λ) and chlorophyll a, TN, total phosphorus, and TAlk. Moreover, total copper ion concentration and mercury ion concentration had a strong correlation with a (440), a (675), a (440), and a (675). The concentration of total aluminum ions exhibited a positive correlation with a (675) and a (675) (p < 0.05), and a significant correlation was observed between total arsenic concentration and a (440). Furthermore, the interaction between metal ions and optically active substances provided an insight into particulates and CDOM properties linked to water quality characteristics for rivers in semiarid areas.
在辽河流域的五条河流中，结合环境因素测量了包括非藻类颗粒、浮游植物和有色溶解有机物（CDOM）在内的光学活性物质的吸收特性。大多数样品中非藻类颗粒的光谱吸收[a(λ)]与总颗粒相似，表明总颗粒[a(λ)]的吸收主要由 a(λ)决定。西辽河和太子河的 CDOM 吸收光谱[a(λ)]与浑河、辽河和东辽河的吸收光谱明显不同。冗余分析表明，光活性物质的吸收和人为营养物质的干扰可能导致水质参数的多样性。包括溶解有机碳、总碱度（TAlk）和总氮（TN）在内的环境变量与 440nm 处的 CDOM 吸收[a(440)]具有显著相关性。a(λ)与叶绿素 a、TN、总磷和 TAlk 之间几乎没有相关性。此外，总铜离子浓度和汞离子浓度与 a(440)、a(675)、a(440)和 a(675)有很强的相关性。总铝离子浓度与 a(675)和 a(675)呈正相关（p<0.05），总砷浓度与 a(440)之间存在显著相关性。此外，金属离子与光活性物质之间的相互作用深入了解了半干旱地区河流中与水质特征相关的颗粒物和 CDOM 特性。
