Graduate Institute of Environmental Engineering, National Central University, Chung-Li, Taoyuan County 320, Taiwan, ROC.
J Hazard Mater. 2012 May 30;217-218:323-9. doi: 10.1016/j.jhazmat.2012.03.031. Epub 2012 Mar 19.
This article covers the adsorption capacity of microcystin-LR (MC-LR) onto natural organic matter (NOM) or suspended solids of water samples from reservoirs (Emerald and Jade reservoirs) and rivers (Dongshan, Erhjen and Wukai rivers) in Taiwan to determine the fate, transport behavior and photo-degradation of microcystins in natural water systems. Langmuir adsorption and photo-degradation studies were carried out and the capability of samples for MC-LR adsorption was confirmed. Among these, samples collected from reservoir showed enhanced MC-LR adsorption than that of river samples and the greater adsorption behavior was always favored by larger content of organic matter and suspended particles in the system. It is obvious from the experimental results that the adsorption of MC-LR was influenced by suspended particles (turbidity), humic acid (HA), organic matter content and other pollutants. The effective photo-degradation of MC-LR was achieved using higher energy, lower wavelength (254 nm) UV light within 60 min. The presence of humic acid and turbidity affected the photo-degradation process. These data provide important information that may be applied to management strategies for improvement of water quality in reservoirs and rivers and other water bodies in Taiwan.
本文研究了台湾地区水库（翡翠水库和玉石水库）和河流（东山溪、二仁溪和乌开溪）水样中的天然有机物（NOM）或悬浮物对微囊藻毒素-LR（MC-LR）的吸附容量，以确定微囊藻毒素在天然水系中的归宿、迁移行为和光降解。进行了 Langmuir 吸附和光降解研究，并证实了样品对 MC-LR 的吸附能力。其中，从水库采集的样品显示出比河流样品更强的 MC-LR 吸附能力，而较大的吸附行为总是受到系统中更多的有机物和悬浮颗粒的影响。从实验结果可以明显看出，MC-LR 的吸附受到悬浮颗粒（浊度）、腐殖酸（HA）、有机物含量和其他污染物的影响。使用更高能量、更低波长（254nm）的紫外线在 60 分钟内可有效实现 MC-LR 的光降解。腐殖酸和浊度的存在会影响光降解过程。这些数据提供了重要信息，可应用于改善台湾地区水库和河流及其他水体水质的管理策略。
