高等学校化学学报2016，Vol.37Issue(12)：2221-2227,7.DOI:10.7503/cjcu20160435
多羟基结构态亚铁化合物预处理含亚硒酸盐工业废水的影响机制
Removal Research of Selenite in Wastewater with the Ferrous Hydroxyl Complex(FHC)†
摘要
Abstract
Se (Ⅳ) and Se (Ⅵ) were found in treatment of industrial wastewater, especially toxicity and highly radioactivity of Se(Ⅳ) are seriously hazardous to the natural environment. The ferrous hydroxyl com⁃plex( FHC) , structural Fe(Ⅱ) , was synthesized by precipitation method, and for the treatment of industrial wastewater containing selenite were investigated by FHC. The results showed that Se (Ⅳ) removal rate was 40% by FHC when pH value was 8� Se (Ⅳ) removal rate were 80%, 90%, 53% by FHC when pH values were 6�5, 8, 9�5, respectiverly, and Cu(Ⅱ) concentration was 0�5 mmol/L. In other conditions being the same, Se(Ⅳ) removal rate was 93%, 99%, 98% when Ag(Ⅰ) concentration was 0�3 mmol/L. However, in the pH value of 8, Se(Ⅳ) removal rate was 30%, 24% and 21% when nitrite concentration was 0�2, 2 and 20 mmol/L. This result showed that the nitrite has an obviously inhibition in Se(Ⅳ) removal. The sam⁃ples were characterized via X⁃ray photoelectron spectroscopy( XPS) and X⁃ray diffraction( XRD) , which indi⁃cated silver ions converted into elemental silver, copper ions were reduced into cuprous oxide, selenite were fixed onto the structure state ferrous surface and reduced for oxidation state of selenium. By sequential extrac⁃tion procedure, analysis on selenium in sediments has been found that selenide and element Se was the main reduction product, which indicated the reduction immobilization was mainly selenite removal envelope. Owing to FHC strong coagulation and reduction ability, it should be of practically potential for treatment of industrial waste water.关键词
多羟基结构态亚铁化合物/亚硒酸盐/金属离子/亚硝酸盐/连续浸提Key words
Structure state ferrous hydroxyl complex/Selenite/Metal ion/Nitrite/Sequential extraction分类
化学化工引用本文复制引用
付茂,吴德礼,张亚雷,张勇..多羟基结构态亚铁化合物预处理含亚硒酸盐工业废水的影响机制[J].高等学校化学学报,2016,37(12):2221-2227,7.基金项目
国家自然科学基金（批准号51278356）．? Supported by the National Natural Science Foundation of China（ No．51278356）． （）
