本文選題：砷 + 鐵-砷配合物�。� 參考：《Transactions of Nonferrous Metals Society of China》2017年09期

【摘要】：冶煉酸性廢水中砷的去除是一項十分緊迫的工作。目前最常用的方法是先將三價砷氧化為五價砷,然后再以鐵鹽進行沉淀去除。砷的氧化還原行為及化學形態(tài)基礎研究對于砷的去除意義重大。采用循環(huán)伏安法和紫外可見分光光度法開展實驗室研究,采用HSC和MINTEQ軟件進行理論分析。研究發(fā)現(xiàn)三價砷的氧化是一個多電子轉移反應,受擴散控制;在pH 1.0的硫酸溶液中,三價砷的氧化過電位非常高(約0.9 V)。另外,針對Fe(Ⅲ)-As(V)-H_2SO_4-H_2O系列溶液的紫外-可見光譜以及物質形態(tài)分析均表明Fe(Ⅲ)-As(V)配合物的存在。因此,基于其他研究者預測的熱力學數(shù)據,繪制Fe(Ⅲ)、As(V)的物質形態(tài)隨pH的分布規(guī)律圖和包含F(xiàn)e-As配合物的新型電位-pH圖。
[Abstract]:The removal of arsenic from acid wastewater is an urgent task. The most commonly used method is to oxidize trivalent arsenic to pentavalent arsenic and then precipitate it with iron salt. The study on the redox behavior and chemical speciation of arsenic is of great significance to the removal of arsenic. The laboratory research was carried out by cyclic voltammetry and UV-Vis spectrophotometry, and the theoretical analysis was carried out by HSC and MINTEQ software. It is found that the oxidation of trivalent arsenic is a multielectron transfer reaction controlled by diffusion, and the oxidation overpotential of trivalent arsenic is very high (about 0.9 V ~ (-1) in pH 1.0 sulfuric acid solution. In addition, the UV-Vis spectra and speciation analysis of Fe (鈪，

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