A combined photocatalytic determination system for chemical oxygen demand with a highly oxidative reagent

doi:10.1016/j.aca.2010.11.049

	A combined photocatalytic determination system for chemical oxygen demand with a highly oxidative reagent
	Zhang, Aiyong 2; Zhou, Minghua 2; Zhou, Qixing 1,2
刊名	ANALYTICA CHIMICA ACTA
	2011-02-07
卷号	686 期号:1-2 页码:133-143
关键词	Environmental Monitoring Chemical Oxygen Demand (Cod) Determination System Determination Procedure Photocatalytic Oxidation Photocatalytic Reduction
ISSN号	0003-2670
DOI	10.1016/j.aca.2010.11.049
英文摘要	This study focuses on the proposal and validation of a combined photocatalytic (PC) system and a three-parameterized procedure for the determination of chemical oxygen demand (COD; PCCOD(combined)), with a highly oxidative reagent utilized as a photoelectron scavenger and signal indicator. The PcCOD(combined) was the functional combination of photon-efficient thin-layer photocatalytic oxidation, conventional bulk-phase photocatalytic oxidation and photocarrier-efficient high-activity photocatalytic reduction in one single photodigestion system, and consequently, this system possessed high photon-utilization efficiency, automatic stirring function and satisfactory determination characteristics. In comparison with the conventional one-parameterized procedure, the three-parameterized procedure introduces the blank and total photocatalytic reduction responses as two of the three significant analytical parameters. Under the optimized pH value of 3.0-4.5 and a rotating rate of 40 rpm, the representative KMnO(4) species was used for the PcCOD(combined) system as the combined high-activity oxidant, and a narrow and reliable analytical linear range of 0-260 mg L(-1) was achieved during the 10 min duration of the determinations. No observable interference of Cl(-) was found at concentration of the ion up to 2000 mg L(-1). A real sample analysis indicated that the measured values for the PcCOD(combined) were all within a relative deviation below 5% of COD(Cr) of the standard method, which further validates the practical feasibility of the proposed PcCOD(combined) system. (C) 2010 Elsevier B.V. All rights reserved.
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000286704800017
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121947]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zhou, Minghua
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Terr Ecol Proc, Shenyang 110016, Peoples R China 2.Nankai Univ, Coll Environm Sci & Engn, Minist Educ, Key Lab Pollut Proc & Environm Criteria, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Aiyong,Zhou, Minghua,Zhou, Qixing. A combined photocatalytic determination system for chemical oxygen demand with a highly oxidative reagent[J]. ANALYTICA CHIMICA ACTA,2011,686(1-2):133-143.
APA	Zhang, Aiyong,Zhou, Minghua,&Zhou, Qixing.(2011).A combined photocatalytic determination system for chemical oxygen demand with a highly oxidative reagent.ANALYTICA CHIMICA ACTA,686(1-2),133-143.
MLA	Zhang, Aiyong,et al."A combined photocatalytic determination system for chemical oxygen demand with a highly oxidative reagent".ANALYTICA CHIMICA ACTA 686.1-2(2011):133-143.