Development of a flow through photo-reactor to study degradation of organic compounds by Sequential Injection Analysis (SIA)

Abstract

Este trabalho descreve um foto-reator para a execução "in line" da degradação de compostos orgânicos através da reação de foto-Fenton, utilizando-se de um sistema de Análise por Injeção Sequencial (SIA). Uma solução do corante do sal tetrassódico de ácido 3,4′,4″,4″′-tetrassulfônico de ftalocianina de cobre foi empregada como modelo da família das ftalocianinas, cujos pigmentos apresentam grande utilização na indústria de tintas automotivas. Baseando-se em testes preliminares, uma remoção de cor de 97% foi obtida em uma solução contendo 20 µmol L -1 deste corante.This work describes a photo-reactor to perform in line degradation of organic compounds by photo-Fenton reaction using Sequential Injection Analysis (SIA) system. A copper phthalocyanine-3,4′,4″,4″′-tetrasulfonic acid tetrasodium salt dye solution was used as a model compound for the phthalocyanine family, whose pigments have a large use in automotive coatings industry. Based on preliminary tests, 97% of color removal was obtained from a solution containing 20 µmol L -1 of this dye.

Designing the Mineralization of a Wastewater Sample from a Coating Industry

“…1. The photo-reactor used in the experiments was designed in the authors' laboratory [15], based on a previous system described by Cavicchioli and Gutz [16]. Shortly, the photo-reactor consists of a quartz bulb of a high pressure mercury vapor source obtained from a common street lightning fluorescent lamp (Osram HQL E40, 400 W) by cutting and removing the larger external fluorescent bulb.…”

A análise por injeção sequencial (SIA): vinte anos em uma perspectiva brasileira

“…75,77 No campo da indústria farmacêutica, há trabalhos focados na determinação de vitamina B 6 , 35 Fe 2+ , 36,41 Cl -, 50 metoprolol, acebutolol e propranolol, 67 além de midazolam e diazepam. 71 Um destes trabalhos 50 é o único a empregar dois meios de detecção (espectrofotometria e potenciometria) para a determinação de um único analito; esta abordagem, segundo os autores, permite uma estimativa com maior exatidão da concentração do analito na amostra.…”

Decolorization Treatment of Copper Phthalocyanine Textile Dye Wastewater by Electrochemical Methods

“…Common methods for treatment and remediation of dye bearing wastewaters are oxidative processes such as chlorination or ozonation [6], advanced oxidation processes such as Fenton, photo-Fenton [7][8][9], photocatalytic [10] sonochemical processes [11] and biological processes.…”

“…Conventional biological and oxidation treatment processes are often less successful because these dyes are barely or non biodegradable [9,12]. Degradation of copper phthalocyanines by heterogenous or homogenous photocatalytic processes [13] and UV irradiation in the presence of H 2 O 2 [8,9] have been reported.…”

“…What is reported refers to electrocoagulation of the non sulfonated parent copper phthalocyanine [21], photo-degradation of di-or tetrasulfonated phthalocyanine [8,9,13] and ultrasound degradation of parent phthalocyanine [11].…”