In this study, the degradation of carbamazepine (CBZ) was comparatively investigated by UV-LED/persulfate (PS) and UV-LED/H₂O₂ processes in the presence of trace Cu²⁺ at neutral pH. Results showed that the introduction of trace Cu²⁺ accelerated CBZ degradation and more favorable performance was achieved in UV-LED/PS process. As oxidants dosage raised from 0.2 to 1.0 mM, the pseudo-first-order rate constant (k_obs) value of CBZ both linearly increased in UV-LED/PS/Cu²⁺ and UV-LED/H₂O₂/Cu²⁺ processes. The promotion effect of Cu²⁺ at low level was more significant than that at high level in both processes at neutral pH. With reducing solution pH from 7.2 to 3.1, the k_obs value dramatically increased from 0.136 to 0.399 min^-1 in UV-LED/PS/Cu²⁺ process, while its value exhibited the imperceptible change in UV-LED/H₂O₂/Cu²⁺ process. ·OH functioned as the major contributor to CBZ degradation in two processes in pH range of 3.1-7.2. The addition of humic acid (HA), HCO₃^- and Cl^- impeded CBZ degradation in UV-LED/H₂O₂/Cu²⁺ process. As for UV-LED/PS/Cu²⁺ process, the k_obs value significantly increased in the presence of Cl^-, while the introduction of HA and HCO₃^- restrained the removal. Total eleven degradation intermediates of CBZ were identified and a reasonable degradation pathway was proposed based on HPLC-MS/MS analysis and the calculation of Gaussian program. The acute toxicities of reacted solution enhanced in both processes within 15 min, especially in UV-LED/PS/Cu²⁺ process. In terms of electrical energy per order value, UV-LED/PS/Cu²⁺ process was found to be more cost-effective than UV-LED/H₂O₂/Cu²⁺ process. It was also noticed that UV-LED/PS process was more effective for CBZ removal in natural water in the presence of trace Cu²⁺.

在这项研究中，在中性pH值存在微量Cu ²⁺的情况下，通过UV-LED /过硫酸盐（PS）和UV-LED / H ₂ O ₂工艺比较了卡马西平（CBZ）的降解。结果表明，在UV-LED / PS工艺中，微量Cu ²⁺的引入促进了CBZ的降解，并获得了更好的性能。随着氧化剂剂量从0.2 mM增加到1.0 mM，在UV-LED / PS / Cu ²⁺和UV-LED / H ₂ O ₂ / Cu ^2中，CBZ的假一级速率常数（k _obs）值均线性增加。⁺流程。Cu ²⁺的促进作用在中性pH值下，两个过程中的低浓度值都比高浓度值更显着。与还原溶液的pH值从7.2至3.1，所述ķ _OBS值急剧从0.136增加至0.399分钟^-1在UV-LED / PS /铜²⁺过程，同时它的值显示在UV-LED /了细微的变化ħ ₂ ö ₂ / Cu ²⁺工艺。·OH在3.1-7.2的pH范围内的两个过程中是CBZ降解的主要起因。腐殖酸（HA），HCO的加入₃ ^-和Cl ^-阻碍CBZ降解在UV-LED / H ₂ ö ₂ /铜²⁺过程。至于UV-LED / PS / Cu²⁺过程中，ķ _OBS值显著在氯的存在增加^- ，同时引入HA和HCO的₃ ^-抑制了去除。基于HPLC-MS / MS分析和高斯程序的计算，确定了总共11种CBZ降解中间体，并提出了合理的降解途径。在15分钟内两个过程中，特别是在UV-LED / PS / Cu ²⁺过程中，反应溶液的急性毒性均得到增强。就每订单价值的电能而言，发现UV-LED / PS / Cu ²⁺工艺比UV-LED / H ₂ O ₂ / Cu ²⁺具有更高的成本效益。处理。还注意到在存在痕量Cu ²⁺的情况下，UV-LED / PS工艺对于天然水中CBZ的去除更有效。