发达地区景观中溪流源水中溶解态金属和有机物的粒径特征分析
Size characterization of dissolved metals and organic matter in source waters to streams in developed landscapes.
作者信息
Luan Hongwei, Vadas Timothy M
机构信息
University of Connecticut, Department of Civil and Environmental Engineering, Storrs, CT 06269, USA.
University of Connecticut, Department of Civil and Environmental Engineering, Storrs, CT 06269, USA; University of Connecticut, Center for Environmental Science and Engineering, Storrs, CT 06269, USA.
出版信息
Environ Pollut. 2015 Feb;197:76-83. doi: 10.1016/j.envpol.2014.12.004. Epub 2014 Dec 12.
Individual and mixed water samples from wastewater treatment plant effluents, stormwater runoff, streams from developed areas were characterized with respect to organic matter concentration and spectral properties and metal concentration and size distribution. In addition, asymmetric flow-field flow fractionation coupled to inductively coupled plasma mass spectrometry was used to measure concentration, size distribution and association of metals in the colloidal size range. Results reveal that Fe, Cu, Zn and Pb in the colloidal size range were mainly associated with the less than 5 nm, or less than 10 kDa size range. Cu was most strongly associated with organic matter, while Zn and Pb were mixed between Fe and organic matter. Effluent showed higher binding capacity for metals, while stormwater, even with higher organic matter concentrations showed more exchangeable metals. Upon mixing of source waters, colloidal metal concentrations and size distributions were conserved.
对来自污水处理厂废水、雨水径流、发达地区溪流的单个水样和混合水样，就有机物浓度和光谱特性以及金属浓度和粒径分布进行了表征。此外，采用不对称流场流分馏与电感耦合等离子体质谱联用技术，测定了胶体粒径范围内金属的浓度、粒径分布和缔合情况。结果表明，胶体粒径范围内的铁、铜、锌和铅主要与小于5纳米或小于10千道尔顿的粒径范围相关。铜与有机物的缔合最为强烈，而锌和铅则在铁和有机物之间混合。废水对金属的结合能力较高，而雨水即使有机物浓度较高，也显示出更多的可交换金属。水源混合后，胶体金属浓度和粒径分布保持不变。
Zotero 插件