做企业项目中遇到了砷酸钠，需要了解其基本性质

论文题目：A novel process of immobilizing arsenic from sodium arsenate crystals as scorodite using Fe(OH)3 as an iron source 论文摘要：Sodium arsenate crystals are a hazardous waste produced from utilization of arsenic–alkali residue in antimony metallurgy, and pose a serious threat to the environment. In this article, to eradicate the damage of sodium arsenate and enhance the sustainable development of non-ferrous metallurgy, a novel process was proposed to immobilize arsenic as flaky scorodite using Fe(OH)3 as an iron source. This process was mainly composed of three parts, namely, thermodynamic analysis for scorodite formation and arsenic removal, optimizing crucial factors for scorodite synthesis, and removing arsenic from reacted solution. In the thermodynamic analysis part, high ionic activities significantly expand the stable area of scorodite in E–pH diagram, and △rG for synthesis is greatly influenced by temperature, and controlling the pH of Fe–As coprecipitation is feasible to remove arsenic from solution. In scorodite synthesis part, 99.88% of arsenic was converted to a flaky scorodite having a size of 2–5 μm by optimizing parameters. In arsenic removing part, residual arsenic and iron were completely coprecipitated into another iron source by dropping NaOH solution to final pH=5.0. The final products include scorodite and sodium sulfate in the whole process. Overall, this new approach successfully eliminates the potential arsenic pollution from arsenic-alkali residue utilization and realizes the environmental protection goal. 论文类型：SCI 导师姓名：唐新村教授