Comparative Examination of Effects of Binding of Different Metals on   Chromophores of Dissolved Organic Matter

doi:10.1021/es4045314

CORC > 北京大学 > 环境科学与工程学院

	Comparative Examination of Effects of Binding of Different Metals on Chromophores of Dissolved Organic Matter
	Yan, Mingquan ; Korshin, Gregory V.
刊名	environmental science technology
	2014
关键词	NICA-DONNAN MODEL RIVER FULVIC-ACID HUMIC SUBSTANCES ION-BINDING OPTICAL-PROPERTIES PROTON-BINDING BASES HSAB SOFT ACIDS IN-SITU ABSORBENCY
DOI	10.1021/es4045314
英文摘要	This study quantified the binding of dissolved organic matter (DOM) from Suwannee River with nine metals, Ca(II), Mg(II), Fe(III), Al(III), Cu(II), Cd(II), Cr(III), Eu(III), and Th(IV), using a differential absorbance approach. The differential spectra of DOM were closely fitted with six Gaussian bands that were present for all of the metals at varying pH values. Their maxima were located at ca. 200, 240, 276, 316, 385, and 547 nm (denoted as A0, A1, A2, A3, A4, and A5, respectively). The relative contributions and signs of the Gaussian bands were metal-specific and correlated to some degree with the covalent-bonding index of the ions and applicable complexation constants of the NICA-Donnan model. The intensity of band A4 was linearly proportional to the concentration of DOM-complexed metal, although these correlations formed two groups with different slopes, reflecting the nature of DOM metal interactions. The results demonstrate that differential spectra yield results indicative of the nature and extent of metal and DOM interactions.; Engineering, Environmental; Environmental Sciences; SCI(E); EI; PubMed; 4; ARTICLE; yanmq@pku.edu.cn; 6; 3177-3185; 48
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158772]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Yan, Mingquan,Korshin, Gregory V.. Comparative Examination of Effects of Binding of Different Metals on Chromophores of Dissolved Organic Matter[J]. environmental science technology,2014.
APA	Yan, Mingquan,&Korshin, Gregory V..(2014).Comparative Examination of Effects of Binding of Different Metals on Chromophores of Dissolved Organic Matter.environmental science technology.
MLA	Yan, Mingquan,et al."Comparative Examination of Effects of Binding of Different Metals on Chromophores of Dissolved Organic Matter".environmental science technology (2014).