Versatile dodecyl trimethyl ammonium bromide modified γ-FeOOH for simultaneous removal and determination of As(Ⅴ)

Xuechao Xu; Juanli Yang; Guijie Hao; Mengyuan Tan; Lu Gao; Zhen-Quan Yang

doi:10.1016/j.aca.2023.341310

Versatile dodecyl trimethyl ammonium bromide modified γ-FeOOH for simultaneous removal and determination of As(Ⅴ)

Anal Chim Acta. 2023 Jul 11:1264:341310. doi: 10.1016/j.aca.2023.341310. Epub 2023 May 1.

Authors

Xuechao Xu¹, Juanli Yang², Guijie Hao³, Mengyuan Tan², Lu Gao², Zhen-Quan Yang⁴

Affiliations

¹ School of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, China; Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, 313001, Zhejiang, China. Electronic address: xuechaoxu@yzu.edu.cn.
² School of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, China.
³ Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou, 313001, Zhejiang, China.
⁴ School of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, China. Electronic address: yangzq@yzu.edu.cn.

PMID: 37230726
DOI: 10.1016/j.aca.2023.341310

Abstract

Inorganic arsenic pollution in water spreads all over the world, tremendously threatening environmental safety and human health. Herein, versatile dodecyl trimethyl ammonium bromide modified γ-FeOOH (DTAB-γ-FeOOH) was prepared for sportive removal and visual determination of As(Ⅴ) in water. DTAB-γ-FeOOH displays a nanosheet-like structure with a high specific surface area calculated as 166.88 m² g^-1. Additionally, DTAB-γ-FeOOH shows peroxidase-mimicking feature, which can catalyze colorless TMB to generate blue oxidized TMB (TMBox) in presence of H₂O₂. Removal experiments show that DTAB-γ-FeOOH exhibits good As(Ⅴ) removal efficiency because modification of DTAB makes γ-FeOOH carry abundant positive charges, improving affinity between DTAB-γ-FeOOH and As(Ⅴ). It is found that theoretical maximum adsorption capacity is up to 126.91 mg g^-1. Moreover, DTAB-γ-FeOOH can resist interference of most of co-existing ions. After that, As(Ⅴ) was detected based on peroxidase-like DTAB-γ-FeOOH. As(Ⅴ) can be adsorbed onto DTAB-γ-FeOOH surface, markedly inhibiting its peroxidase-like activity. Based on it, As(Ⅴ) ranging from 1.67 to 3333.33 μg L^-1 can be well detected, with a low LOD (0.84 μg L^-1). The successful sorptive removal and visual determination of As(Ⅴ) from real environmental water indicated that DTAB-γ-FeOOH has great potential in the treatment of As(Ⅴ)-containing environment water.

Keywords: As(Ⅴ); DTAB-γ-FeOOH; Peroxidase-like activity; Sportive removal; Visual determination.