IN-LINE, TITANIUM DIOXIDE-CATALYZED, ULTRAVIOLET MINERALIZATION OF TOXIC AROMATIC-COMPOUNDS IN THE WASTE STREAM FROM A FLOW INJECTION-BASED RESORCINOL ANALYZER

被引：26
作者：
DELAGUARDIA, M
KHALAF, KD
HASAN, BA
MORALESRUBIO, A
CARBONELL, V
机构：
[1] Department of Analytical Chemistry, University of Valencia, 46100 Burjassot, Valencia
来源：
ANALYST | 1995年 / 120卷 / 02期
关键词：
FLOW ANALYSIS; RESORCINOL DETERMINATION; SPECTROPHOTOMETRY; PHOTOLYSIS; TITANIUM DIOXIDE;
D O I：
10.1039/an9952000231
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A clean method was developed for the spectrophotometric determination of resorcinol. The method, based on the reaction between resorcinol and p-aminophenol (PAP), carried out in a flow system, involves an additional detoxification step based on the in-line TiO2-catalysed photodegradation of the indophenol dye formed and the remaining unreacted PAP. For this, after the measurement step the waste stream is merged with a TiO2 slurry (0.5 g l(-1) in 0.22 mol l(-1) HCl) and then passed through a UV photochemical reactor consisting of a PTFE tube (6 m x 0.8 mm i.d.) rolled on a UV lamp with a maximum irradiation wavelength of 254 nm. Under these conditions, the waste can be completely detoxified thus, providing a non-polluting method of analysis.
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页码：231 / 235
页数：5
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