Removal of Tricyclazole and Total Organic Carbon in Real Pesticide Wastewater by Electro-Fenton. (19th January 2022)

• Record Type: Journal Article
• Authors: Bui, Ha Manh; Huynh, Loan Ngoc
• Other Names: Alsohaimi Ibrahim H. Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2022(2022)
• Publication Date: 2022-01-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2022/6918063
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : In this study, electro-Fenton (EF) was employed for the removal of tricyclazole (TC) and total organic carbon (TOC) in real pesticide wastewater (RPW). The central composite design (CCD) with three parameters, that is, current density, Fe 2+ concentration, and electrolysis time, has been conducted to predict the TOC and TC removal efficiency. The high correlation of the quadratic models of 0.9842 and 0.9781 for TC and TOC removal, respectively, indicates the significance of the models. The obtained results revealed that the high-efficiency removal of both TC and TOC in RPW. Approximately 99.6% of TC was decomposed under the optimum conditions of a current density of 2.2 mA/cm 2 and an Fe 2+ concentration of 0.2 mM during 188 min with an operating cost of 121.392 $/kg TC or ∼2.692 $/m 3, while 84.2% TOC was eliminated at a current density of 2.2 mA/cm 2 and an Fe 2+ concentration of 0.2 mM during 217 min with an operating cost of 3.019 $/kg TOC or 3.916 $/m 3 . Acute toxicity tests at optimal condition revealed moderate exhibition toxicity of treated wastewater against Daphnia magna with LC50 values of 3.12%, 2.05%, 1.84%, and 1.36% at 24 h, 48 h, 72 h, and 96 h, respectively. The removal of TC and TOC followed pseudo-first-order kinetic with an R 2 of ∼0.993 and 0.923, respectively.