Preparation of magnetic powdered carbon/nano-Fe3O4 composite for efficient adsorption and degradation of trichloropropyl phosphate from water
2021
Wang, Wei | Zhou, Shuangxi | Li, Rui | Peng, Yongjun | Sun, Zhang | Vakili, Mohammadtaghi | Yu, Gang | Deng, Shubo
Trichloropropyl phosphate (TCPP) as a widely used typical chlorinated organophosphate flame retardant has received significant attention because of its widespread presence in water and negative effects on human health. In this study, a ball-milling method was used to prepare a magnetic powdered carbon adsorbent (PC/nano-Fe₃O₄ composite) for TCPP removal via adsorption and catalytic degradation. The effect of Fe₃O₄ content on TCPP adsorption and degradation performance by PC/nano-Fe₃O₄ composite was investigated. The PC/nano-Fe₃O₄ composite prepared by high Fe₃O₄ content (25%) was not favorable for TCPP adsorption and degradation. However, the PC/Fe₃O₄ containing low Fe₃O₄ content (10%) had insufficient magnetic separation ability from water. The synthesized PC/nano-Fe₃O₄ composite with a Fe₃O₄/PC mass ratio of 1/5 exhibited a maximum adsorption capacity of 2682.1 μg/g as well as a complete TCPP degradation within 3 h in a Fenton-like system. Moreover, the possible break sites of TCPP and its degradation pathway were proposed based on theoretical calculation and experimental analysis. Regeneration studies showed that PC/nano-Fe₃O₄ composite had high reusability and adsorption capacity in six cycles, while its catalytic performance declined in the multiple reuse cycles. This strategy could be extended to prepare other magnetic powdered adsorbents for organic pollutant adsorption and degradation.
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