Enhanced degradation of sulfamethoxazole antibiotic from aqueous solution using Mn-WO3/LED photocatalytic process: Kinetic, mechanism, degradation pathway and toxicity reduction

Abstract This study is an attempt to the removal of Ciprofloxacin (CIP) antibiotic from simulated wastewater using a photocatalytic process. The photocatalytic process was carried out in a photocatalytic reactor in the presence of TiO2 nanoparticles. TiO2 nanoparticles were successfully prepared in a laboratory scale using sol-gel method with titanium-isopropoxide (TTIP) as titanium precursor. Prepared material was found very effective to the removal of CIP antibiotic. The maximum removal efficiency of 87.95% of ciprofloxacin from aqueous solution was achieved at the pH 5, catalyst doze of 40 mg L−1 with initial concentration of ciprofloxacin 5 mg L−1, and the reaction time of 100 min additionally; material characterization of TiO2 was presented in detail in terms of XRD, SEM, UV, and FTIR. It has been found that at the optimum condition the total operating cost indicated for the removal of ciprofloxacin from aqueous solution is 786.56 (INR/kg of CIP removal). This technique demonstrated that photocatalytic reaction in presence of TiO2 nanoparticles is well applicable to treat pharmaceutical wastewater.

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Degradation of rhodamine B in aqueous solution by the UV/ZnO photocatalytic process

2011 International Conference on Materials for Renewable Energy & Environment ◽

10.1109/icmree.2011.5930596 ◽

2011 ◽

Cited By ~ 4

Author(s):

Jing Zhao ◽

Li Wang

Keyword(s):

Aqueous Solution ◽

Rhodamine B ◽

Photocatalytic Process

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Application of enhanced nZnO photocatalytic process with ultrasonic wave in formaldehyde degradation from aqueous solution

Desalination and Water Treatment ◽

10.1080/19443994.2015.1028453 ◽

2015 ◽

Vol 57 (20) ◽

pp. 9455-9464 ◽

Cited By ~ 3

Author(s):

Mohammad Mehdi Amin ◽

Fahimeh Teimouri ◽

Mohsen Sadani ◽

Mohammad Amin Karami

Keyword(s):

Aqueous Solution ◽

Ultrasonic Wave ◽

Photocatalytic Process ◽

Formaldehyde Degradation

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Photocatalytic degradation of sulfamethazine in aqueous solution using ZnO with different morphologies

Royal Society Open Science ◽

10.1098/rsos.171457 ◽

2018 ◽

Vol 5 (4) ◽

pp. 171457 ◽

Cited By ~ 12

Author(s):

Zhigang Yi ◽

Juan Wang ◽

Tao Jiang ◽

Qiong Tang ◽

Ying Cheng

Keyword(s):

Aqueous Solution ◽

Photocatalytic Degradation ◽

Reaction System ◽

Degradation Pathway ◽

Order Reaction ◽

Pseudo First Order Reaction ◽

First Order ◽

Different Shapes ◽

Pseudo First Order ◽

Release Ratio

In this study, photocatalytic experiments of 20 mg l −1 sulfamethazine (SMN) in aqueous solution containing ZnO with different morphologies, tetra-needle-like ZnO (T-ZnO), flower-like ZnO (F-ZnO) and nanoparticles ZnO (P-ZnO), were performed. The results indicated that photocatalytic degradation of SMN was effective and followed the pseudo-first-order reaction, but the degree of SMN mineralization showed obvious differences using ZnO with different shapes. After 12 h irradiation, 86%, 71% and 50% of the initial total organic carbon was eliminated in SMN suspension containing T-ZnO, F-ZnO and P-ZnO, respectively. The release ratio of sulfur was close to 100% in the presence of T-ZnO, but reached to 86% and 67% in the presence of F-ZnO and P-ZnO, respectively. The release ratio of nitrogen was about 76%, 63% and 40% using T-ZnO, F-ZnO and P-ZnO as photocatalyst, respectively. The morphology of ZnO played an important role in determining its catalytic activity. Seven intermediates were observed and identified in the UV/T-ZnO reaction system by LC-MS/MS analysis, and a possible degradation pathway was proposed.

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