Photocatalytic Treatment of Paracetamol Using TiO2 Nanotubes: Effect of pH

被引：31

作者：

Alejandro Lozano-Morales, S. ^{[1
]}

Morales, Graciela ^{[1
]}

Lopez Zavala, Miguel Angel ^{[2
]}

Arce-Sarria, Augusto ^{[3
]}

Machuca-Martinez, Fiderman ^{[3
]}

机构：

[1] CONACYT Ctr Invest Quim Aplicada CIQA, Blvd Enrique Reyna 140, Saltillo 25294, Coahuila, Mexico

[2] Tecnol Monterrey, Escuela Ingn & Ciencias, Av Eugenio Garza Sada Sur 2501, Monterrey 64849, Nuevo Leon, Mexico

[3] Univ Valle, Escuela Ingn Quim, Cali 760032, Colombia

来源：

PROCESSES | 2019年 / 7卷 / 06期

关键词：

photocatalysis; TiO2; nanotubes; emerging contaminants; paracetamol; pH; ACETAMINOPHEN DEGRADATION; EMERGING CONTAMINANTS; WASTE-WATER; OXIDATION PROCESSES; PRODUCTS; KINETICS; REMOVAL; 1,4-BENZOQUINONE; PHOTODEGRADATION; TRANSFORMATION;

D O I：

10.3390/pr7060319

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Pharmaceuticals are considered among the group of emerging contaminants. Paracetamol is a moderate painkiller, which has been detected in ground and surface water. Photodegradation of paracetamol at a wavelength of radiation of 254 nm with TiO2 nanotubes was studied by UV-spectroscopy, HPLC and measurement of the potential zeta in dependence of the solution pH. The efficiency of the photodegradation of paracetamol (20 mg L-1) was 99% after 100 min exposure. Application of the Langmuir-Hinshelwood equation allowed the evaluation of the rate constant. Non-organic by-products were detected under the conditions of the chromatographic analysis. The photoreaction was faster at pH 6.5, a value at which adsorption was favored, leading to higher efficiency.

引用

页数：9

共 42 条

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