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Diphenamid photodegradation using Fe(III) impregnated N-doped TiO2/sulfite/visible LED process: Influence of wastewater matrix, kinetic modeling, and toxicity evaluation.
Chemosphere. 2020 Oct; 256:127094.C

Abstract

Sulfite-based photocatalysis has been recently employed as a promising technology for the treatment of organic pollutants via the generation of reactive radicals. In this contribution, the effect of wastewater matrix constituents and toxicity evaluation were systematically investigated in the FeIII impregnated N-doped TiO2 (FeN-TiO2)/sulfite/visible LED (Vis LED) process in the presence of diphenamid (DPA) as a model organic pollutant. The results showed that the presence of HCO3-, SO42-, NO3-, and F- had no detrimental effect on DPA degradation. Conversely, the presence of Cr(VI), NO2-, Cl-, and Br- caused a stronger retardation effect. The effect of natural organic matter such as humic acid (HA) was inert at normal concentrations. Interestingly, the retardation effect of inorganic ions can be quantified at any given ion concentration based on the linear correlations between the DPA decay (first-order kinetic constants) and concentration of ion species. Toxicity tests on Synechocystis sp., Microcystis flos-aquae, and Nostoc sp. algae revealed that higher toxicity was noticed at 240 min treatment time accompanied by lower toxicity with prolonging the treatment time for all selected algae except for Microcystis flos-aquae. In addition, novel two-phase mathematical models were successfully proposed to predict the accumulation of intermediates depending on their evolution profile.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. Electronic address: wei.chu@polyu.edu.hk.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32559888

Citation

Abdelhaleem, Amal, et al. "Diphenamid Photodegradation Using Fe(III) Impregnated N-doped TiO2/sulfite/visible LED Process: Influence of Wastewater Matrix, Kinetic Modeling, and Toxicity Evaluation." Chemosphere, vol. 256, 2020, p. 127094.
Abdelhaleem A, Chu W, Farzana S. Diphenamid photodegradation using Fe(III) impregnated N-doped TiO2/sulfite/visible LED process: Influence of wastewater matrix, kinetic modeling, and toxicity evaluation. Chemosphere. 2020;256:127094.
Abdelhaleem, A., Chu, W., & Farzana, S. (2020). Diphenamid photodegradation using Fe(III) impregnated N-doped TiO2/sulfite/visible LED process: Influence of wastewater matrix, kinetic modeling, and toxicity evaluation. Chemosphere, 256, 127094. https://doi.org/10.1016/j.chemosphere.2020.127094
Abdelhaleem A, Chu W, Farzana S. Diphenamid Photodegradation Using Fe(III) Impregnated N-doped TiO2/sulfite/visible LED Process: Influence of Wastewater Matrix, Kinetic Modeling, and Toxicity Evaluation. Chemosphere. 2020;256:127094. PubMed PMID: 32559888.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Diphenamid photodegradation using Fe(III) impregnated N-doped TiO2/sulfite/visible LED process: Influence of wastewater matrix, kinetic modeling, and toxicity evaluation. AU - Abdelhaleem,Amal, AU - Chu,Wei, AU - Farzana,Shazia, Y1 - 2020/05/17/ PY - 2020/02/08/received PY - 2020/05/13/revised PY - 2020/05/14/accepted PY - 2020/6/21/entrez PY - 2020/6/21/pubmed PY - 2020/7/2/medline KW - Diphenamid KW - FeN-Doped TiO(2) KW - Kinetic modeling KW - Toxicity evaluation KW - Wastewater matrix SP - 127094 EP - 127094 JF - Chemosphere JO - Chemosphere VL - 256 N2 - Sulfite-based photocatalysis has been recently employed as a promising technology for the treatment of organic pollutants via the generation of reactive radicals. In this contribution, the effect of wastewater matrix constituents and toxicity evaluation were systematically investigated in the FeIII impregnated N-doped TiO2 (FeN-TiO2)/sulfite/visible LED (Vis LED) process in the presence of diphenamid (DPA) as a model organic pollutant. The results showed that the presence of HCO3-, SO42-, NO3-, and F- had no detrimental effect on DPA degradation. Conversely, the presence of Cr(VI), NO2-, Cl-, and Br- caused a stronger retardation effect. The effect of natural organic matter such as humic acid (HA) was inert at normal concentrations. Interestingly, the retardation effect of inorganic ions can be quantified at any given ion concentration based on the linear correlations between the DPA decay (first-order kinetic constants) and concentration of ion species. Toxicity tests on Synechocystis sp., Microcystis flos-aquae, and Nostoc sp. algae revealed that higher toxicity was noticed at 240 min treatment time accompanied by lower toxicity with prolonging the treatment time for all selected algae except for Microcystis flos-aquae. In addition, novel two-phase mathematical models were successfully proposed to predict the accumulation of intermediates depending on their evolution profile. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/32559888/Diphenamid_photodegradation_using_Fe(III)_impregnated_N-doped_TiO2/sulfite/visible_LED_process:_Influence_of_wastewater_matrix,_kinetic_modeling,_and_toxicity_evaluation L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)31287-X DB - PRIME DP - Unbound Medicine ER -