Effects of calcium on the chromophores of dissolved organic matter and   their interactions with copper

doi:10.1016/j.watres.2015.05.038

CORC > 北京大学 > 环境科学与工程学院

	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
	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).