Preparation of magnetic powdered carbon/nano-Fe3O4 composite for efficient adsorption and degradation of trichloropropyl phosphate from water.
Preparation of magnetic powdered carbon/nano-Fe3O4 composite for efficient adsorption and degradation of trichloropropyl phosphate from water.
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磁粉碳/纳米Fe3O4复合材料的制备用于高效吸附和降解水中磷酸三氯丙酯。
DOI：
10.1016/j.jhazmat.2021.125765
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发表时间：
2021-03
影响因子：
13.6
通讯作者：
Rui Li
中科院分区：
文献类型：
--
作者：
Yongjun Peng;Shuangxi Zhou;Shubo Deng;Mohammadtaghi Vakili;Gang Yu;Chang Sun;Wei Wang;Rui Li
磷酸三氯丙酯（TCPP）作为一种典型的氯代有机磷酸酯阻燃剂，由于其广泛存在于水体中并对人体健康产生不良影响而受到广泛关注。采用球磨法制备了磁性粉末炭吸附剂（PC/nano-Fe 3 O 4复合材料），并将其用于TCPP的吸附和催化降解。研究了Fe 3 O 4含量对PC/nano-Fe 3 O 4复合材料吸附降解TCPP性能的影响。高Fe 3 O 4含量（25%）制备的PC/纳米Fe 3 O 4复合材料不利于TCPP的吸附和降解。但是，Fe_3 O_4含量低（10%）的PC/Fe_3 O_4磁分离能力不足。合成的PC/纳米Fe 3 O 4复合材料（Fe 3 O 4/PC质量比为1/5）在类芬顿体系中最大吸附量为2682.1 μg/g，并在3 h内完全降解TCPP。在理论计算和实验分析的基础上，提出了TCPP可能的断裂位点及其降解途径。再生研究表明，PC/nano-Fe 3 O 4复合材料在6次循环中具有较高的重复使用性和吸附能力，但多次重复使用后其催化性能有所下降。该方法可以推广到制备其他磁性粉末吸附剂，用于有机污染物的吸附和降解。
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-Fe3O4composite) for TCPP removal via adsorption and catalytic degradation. The effect of Fe3O4content on TCPP adsorption and degradation performance by PC/nano-Fe3O4composite was investigated. The PC/nano-Fe3O4composite prepared by high Fe3O4content (25%) was not favorable for TCPP adsorption and degradation. However, the PC/Fe3O4containing low Fe3O4content (10%) had insufficient magnetic separation ability from water. The synthesized PC/nano-Fe3O4composite 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-Fe3O4composite 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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