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.
School of Food Science and Engineering, Yangzhou University, Yangzhou, 225127, China.
Anal Chim Acta. 2023 Jul 11;1264:341310. doi: 10.1016/j.aca.2023.341310. Epub 2023 May 1.
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 m g. Additionally, DTAB-γ-FeOOH shows peroxidase-mimicking feature, which can catalyze colorless TMB to generate blue oxidized TMB (TMBox) in presence of HO. 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. 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 can be well detected, with a low LOD (0.84 μg L). 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.
水中的无机砷污染遍布全球，严重威胁着环境安全和人类健康。在此，我们制备了多功能十二烷基三甲基溴化铵改性的γ-FeOOH（DTAB-γ-FeOOH），用于水体中 As(Ⅴ) 的选择性去除和可视化测定。DTAB-γ-FeOOH 呈现纳米片状结构，比表面积高达 166.88 m²/g。此外，DTAB-γ-FeOOH 表现出类过氧化物酶的特性，可以在 HO 存在下将无色 TMB 催化生成蓝色氧化 TMB（TMBox）。去除实验表明，DTAB-γ-FeOOH 对 As(Ⅴ)具有良好的去除效率，因为 DTAB 的修饰使 γ-FeOOH 携带丰富的正电荷，提高了 DTAB-γ-FeOOH 与 As(Ⅴ)之间的亲和力。理论最大吸附容量高达 126.91 mg/g。此外，DTAB-γ-FeOOH 可以抵抗大多数共存离子的干扰。然后，基于类过氧化物酶的 DTAB-γ-FeOOH 对 As(Ⅴ)进行了检测。As(Ⅴ)可以被吸附到 DTAB-γ-FeOOH 表面，显著抑制其类过氧化物酶活性。基于此，可以很好地检测到 1.67 至 3333.33 μg/L 的 As(Ⅴ)，检出限（LOD）低至 0.84 μg/L。DTAB-γ-FeOOH 成功地从实际环境水中吸附去除和可视化测定 As(Ⅴ)，表明其在处理含 As(Ⅴ)环境水中具有巨大的潜力。
Zotero 插件