Optimization of Malachite Green Removal from Water by TiO₂ Nanoparticles Under UV Irradiation

Overview

Journal Nanomaterials (Basel)

Date 2018 Jun 15

PMID 29899235

Citations 8

Authors

Yongmei Ma

Maofei Ni

Siyue Li

Affiliations

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Abstract

TiO₂ nanoparticles with surface porosity were prepared by a simple and efficient method and presented for the removal of malachite green (MG), a representative organic pollutant, from aqueous solution. Photocatalytic degradation experiments were systematically conducted to investigate the influence of TiO₂ dosage, pH value, and initial concentrations of MG. The kinetics of the reaction were monitored via UV spectroscopy and the kinetic process can be well predicted by the pseudo first-order model. The rate constants of the reaction kinetics were found to decrease as the initial MG concentration increased; increased via elevated pH value at a certain amount of TiO₂ dosage. The maximum efficiency of photocatalytic degradation was obtained when the TiO₂ dosage, pH value and initial concentrations of MG were 0.6 g/L, 8 and 10 mol/L (M), respectively. Results from this study provide a novel optimization and an efficient strategy for water pollutant treatment.

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