Adsorptive removal of organochloride pesticide in water using surfactant modified aluminum hydroxide nanoparticles

Thi Hang Nguyen; Duy Tung Vu; Minh Ngoc Nguyen; Thi Anh Huong Nguyen; Thanh Son Le; Tien Duc Pham

doi:10.62239/jca.2024.004

Authors

Thi Hang Nguyen Faculty of Chemistry, University of Science, Vietnam National University. Department of Infrastructure and Urban Environmental Engineering, Hanoi Architectural University. Author
Duy Tung Vu Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Author
Minh Ngoc Nguyen Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Author
Thi Anh Huong Nguyen Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Author
Thanh Son Le Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Author
Tien Duc Pham Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam Author

DOI:

https://doi.org/10.62239/jca.2024.004

Abstract

In the present study, an anionic surfactant, sodium dodecyl sulfate (SDS) was used to modify aluminum hydroxide nanoparticles to form a novel adsorbent (SMAH) for removal of an organochloride pesticide, Dichlorodiphenyltrichloroethane (DDT) in water environment. The DDT removal using α-Al(OH)₃ and SMAH nanoparticles were 35.5, and 96.1 %, respectively indicated the high removal efficiency of SMAH compared with α-Al(OH)₃. The effective conditions for adsorptive removal of DDT using SMAH were optimized and found as pH 8, contact time 30 min and SMAH dosage 25 mg/mL. The maximum adsorption capacity of DDT on SMAH calculated by a two-step model was found to be 2500 µg/g. After five regenerations, the DDT removal was still higher than 80 %. Adsorption isotherms of DDT on SMAH and the surface charge change of SMAH after adsorption demonstrate that hydrophobic interactions in the presence of SDS bilayer of admicelle is the main driving force to control DDT adsorption on SMAH.

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