Effects of calcium on the chromophores of dissolved organic matter and their interactions with copper | |
Gao, Yuan ; Yan, Mingquan ; Korshin, Gregory | |
刊名 | WATER RESEARCH
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2015 | |
关键词 | Calcium Copper Complexation Competition Dissolved organic matter NICA-Donnan model Differential absorbance METAL-ION BINDING EXCITATION-EMISSION MATRIX PARALLEL FACTOR-ANALYSIS HUMIC SUBSTANCES FULVIC-ACIDS IN-SITU COMPETITION MODEL COMPLEXATION SPECTROSCOPY |
DOI | 10.1016/j.watres.2015.05.038 |
英文摘要 | The binding of Ca2+ and Cu2+ by dissolved organic matter (DOM) exemplified by Suwannee River Humic Acid (SRHA) was examined in this study. Metal-DOM interactions were quantified using linear and log-transformed DOM absorbance spectra acquired at varying pHs and total Ca2+ and Cu2+ concentrations. The binding of Cu2+ by DOM was examined in the presence of three different Ca2+ concentrations. Interactions of Ca2+ with DOM chromophores were accompanied by the emergence of features in the differential spectra that were dissimilar from those characteristic for the binding of Cu2+. The amount of Ca2+ and Cu2+ bound by DOM was ascertained using changes of the slopes of log-transformed absorbance spectra in the range of wavelength 350-400 nm (denoted as S350-400) and comparing the data with model predictions. The observed effects indicated the occurrence of the replacement of a characteristic number of protons by the bound Ca2+ and Cu2+ ions. (C) 2015 Published by Elsevier Ltd.; China NSF [21277005]; US National Geographic Air and Water Conservation Fund [GEFC15-14]; U.S. NSF [0931676]; Foreign Experts Program of China; SCI(E); EI; PubMed; ARTICLE; yanmq@pku.edu.cn; 47-53; 81 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/416283] ![]() |
专题 | 环境科学与工程学院 |
推荐引用方式 GB/T 7714 | Gao, Yuan,Yan, Mingquan,Korshin, Gregory. Effects of calcium on the chromophores of dissolved organic matter and their interactions with copper[J]. WATER RESEARCH,2015. |
APA | Gao, Yuan,Yan, Mingquan,&Korshin, Gregory.(2015).Effects of calcium on the chromophores of dissolved organic matter and their interactions with copper.WATER RESEARCH. |
MLA | Gao, Yuan,et al."Effects of calcium on the chromophores of dissolved organic matter and their interactions with copper".WATER RESEARCH (2015). |
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