Water, Air, & Soil Pollution ( IF 3.8 ) Pub Date : 2021-09-14 , DOI: 10.1007/s11270-021-05345-3 Qiuyue Li 1 , Jiahao Liang 1 , Xinran Chen 1 , Guining Lu 1 , Kaibo Huang 2 , Xingchun Duan 3 , Xueqin Tao 4
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In this research, the feasibility of UV/Fe(III) photocatalytic technology for the degradation of tris (2-chloroethyl) phosphate (TCEP) was investigated. Experimental results showed that TCEP had a significant removal efficiency in UV/Fe(III) ([TCEP]0 = 10 ppm, [Fe2(SO4)3]0 = 0.5 mM, near-100% degradation rate after 90 min). A free radical scavenging experiment and EPR detection indicated that the formation of ·OH by the Fe(III) under ultraviolet light played a major role. Experiments on influencing factors revealed that oxygen accelerated the degradation of TCEP by accelerating the Fe(II)/Fe(III) cycle, but Cl− and PO43− inhibited TCEP degradation. Three intermediate products were generated, including C4H9Cl2O4P (product A, m/z 222.9690), C6H13Cl2O5P (product B, m/z 266.9954), and C2H6ClO4P (product C, m/z 160.9762). Moreover, the degradation pathways primarily involved the C–Cl bond and phosphoric center being attacked. Escherichia coli toxicity test revealed that UV/Fe(III) treatment reduced environmental risk of TCEP. Therefore, UV/Fe(III) photocatalysis is a promising technique for TCEP control in wastewater treatment.
Graphical abstract
中文翻译：
通过 UV/Fe(III) 光催化降解磷酸三（2-氯乙基）酯：动力学、产物和毒性评估
在本研究中，研究了 UV/Fe(III) 光催化技术降解磷酸三（2-氯乙基）酯（TCEP）的可行性。实验结果表明，TCEP 对 UV/Fe(III) 具有显着的去除效率（[TCEP] 0 = 10 ppm，[Fe 2 (SO 4 ) 3 ] 0 = 0.5 mM，90 分钟后降解率接近 100%） . 自由基清除实验和EPR检测表明，Fe(III)在紫外光下形成·OH起主要作用。影响因素实验表明，氧气通过加速Fe(II)/Fe(III)循环加速TCEP的降解，但Cl -和PO 4 3-抑制 TCEP 降解。生成了三种中间产物，包括 C 4 H 9 Cl 2 O 4 P（产物 A，m/z 222.9690）、C 6 H 13 Cl 2 O 5 P（产物 B，m/z 266.9954）和 C 2 H 6 ClO 4 P（产品 C，m/z 160.9762）。此外，降解途径主要涉及 C-Cl 键和被攻击的磷酸中心。大肠杆菌毒性试验表明，UV/Fe(III) 处理降低了 TCEP 的环境风险。因此，UV/Fe(III) 光催化是废水处理中 TCEP 控制的一种很有前途的技术。
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