UVC-assisted electrochemical degradation of novel bisphenol analogues with boron-doped diamond electrodes: kinetics, pathways and eco-toxicity removal.
UVC-assisted electrochemical degradation of novel bisphenol analogues with boron-doped diamond electrodes: kinetics, pathways and eco-toxicity removal.
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DOI：
10.1016/j.scitotenv.2019.134539
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
Cheng Luo;Rui Hou;Guanjun Chen;Chuangchuang Liu;Lihua Zhou;Yong Yuan
中科院分区：
文献类型：
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作者：
Cheng Luo;Rui Hou;Guanjun Chen;Chuangchuang Liu;Lihua Zhou;Yong Yuan
在本研究中，研究了三种新型双酚类似物（BPs;包括双酚F、S和B，即，用硼掺杂金刚石（BDD）电极研究了双酚A（BPA）和双酚F（BPF，BPS和BPB）的沿着。首先，本研究证明了电流密度对BDD阳极降解BPF的速率有显著的影响。在施加的电流密度为10、20和30 mA/cm 2时，BPF的伪一级速率常数分别计算为0.012、0.028和0.029 min-1。在5 ~ 30 mg/L的浓度范围内，UVC辐照对BPF的电化学降解有显著的促进作用，协同效应在32.0%~ 40.9%之间。UVC-BDD电解显示出与单一BDD电解相当或甚至更低的每订单电能（EEO）。在紫外光作用下，降解速率常数的大小顺序为：BPF > BPA > BPB > BPS。基于所鉴定的转化产物，提出了新型BPs的紫外光辅助电化学降解途径主要是羟基化和键断裂。紫外线照射可以促进BDD电极产生羟基自由基，从而加速降解过程。对于这些BP，近100%的矿化可以实现通过修改后的策略，使用短时间的紫外线辅助BDD电解（120分钟），然后由紫外线光解（360分钟）。最后，经过120 min的电化学降解后，BPs溶液对费氏弧菌的生态毒性得到了明显的去除.基于这些结果，使用BDD电极的UV C辅助的电化学处理可以被认为是一种有前途的技术，用于去除新型BPs并减少其对水环境的有害影响。
In the present study, the UVC-assisted electrochemical degradation of three novel bisphenol analogues (BPs; including bisphenol F, S, and B, i.e., BPF, BPS and BPB, respectively), along with bisphenol A (BPA), was investigated using boron-doped diamond (BDD) electrode. At first, this study demonstrated a significant influence of current density on the degradation rates of BPF by the BDD anode. The pseudo-first order rate constants for BPF were calculated as 0.012, 0.028 and 0.029 min−1at the applied current densities of 10, 20 and 30 mA/cm2, respectively. UVC irradiation significantly enhanced the electrochemical degradation of BPF in the concentration range from 5 to 30 mg/L, with synergistic effects in the range of 32.0%–40.9%. The UVC-BDD electrolysis showed comparable or even lower electric energy per order (EEO) than single BDD electrolysis. The UVC-assisted degradation of the investigated BPs showed decreased pseudo-first order rate constants in the following order: BPF > BPA > BPB > BPS. Based on the identified transformation products, UVC-assisted electrochemical degradation pathways of the novel BPs were proposed to be mainly hydroxylation and bond-cleavage. UVC irradiation has been proved to promote the formation of hydroxyl radicals by BDD electrode to facilitate the degradation process. For these BPs, nearly 100% mineralization can be achieved by a modified strategy using a short-time UVC-assisted BDD electrolysis (120 min) that is followed by UVC photolysis (360 min). Finally, the eco-toxicity of the BPs solutions towardsVibrio Fischeriwas significantly removed after 120 min of the electrochemical degradation period. Based on these results, the UVC-assisted electrochemical treatment using a BDD electrode can be considered a promising technology for the removal of novel BPs and the reduction of their hazardous effects to aqueous environments.