Recovery of antimony (Sb) from wastewater is desired. Deposition of Sb(III) to metal Sb can occur via cathodic reduction, which is limited for Sb(V) reduction. Herein, a UV/sulfite-assisted electrodeposition (UV/sulfite/E) system was developed for the recovery of Sb(V) as metal Sb. The hydrated electron (e_aq^-) generated from UV/sulfite process reduced Sb(V) to Sb(III), which was simultaneously reduced to metal Sb via cathodic reduction. Results indicated that as high as 95% of Sb(V) with a concentration of 50 mg/L can be deposited onto the cathode as metal Sb within 6 h. The reduction of Sb(V) to Sb(III) by e_aq^- was confirmed by laser flash photolysis tests. More importantly, the OH^- generated at cathode increased the pH of the UV/sulfite/E system and enabled the e_aq^- generation even at pH = 4, which was beneficial for Sb(V) reduction at a wide pH range. The optimal conditions for Sb(V) recovery were found to be at a sulfite concentration of 10 mM and an applied potential of -1.2 V (vs. SCE). The recovery of Sb(V) from practical Sb-containing wastewater was finally carried out and the results indicated that more than 60% of Sb was recovered as metal Sb.

需要从废水中回收锑（Sb）。可以通过阴极还原将Sb（III）沉积到金属Sb中，这对于Sb（V）还原是有限的。在本文中，开发了用于辅助回收Sb（V）作为金属Sb的UV /亚硫酸盐辅助电沉积（UV /亚硫酸盐/ E）系统。水合电子（E_水溶液^- ）从UV /亚硫酸盐法产生的缩减的Sb（V）至锑（III），其同时通过阴极还原还原成金属锑。结果表明，浓度为50 mg / L的高达95％的Sb（V）可以在6小时内作为金属Sb沉积到阴极上。锑（V），以锑（III）的通过e还原_水溶液^-通过激光闪光光解试验确认。更重要的是，OH ^-在阴极产生增加了UV /亚硫酸盐/ E系统的pH值和使能电子_水溶液^-代甚至在pH = 4，这对锑（V）还原在宽pH范围内是有益的。发现Sb（V）回收的最佳条件是亚硫酸盐浓度为10 mM，施加电势为-1.2 V（相对于SCE）。最终从实际的含Sb废水中回收Sb（V），结果表明，超过60％的Sb作为金属Sb被回收。