水污染严重影响生态环境和人类健康,染料废水是其中的典型代表。利用酵母细胞作磷源和碳源,通过共沉淀-缺氧热解制备了磷化铁/生物碳复合材料,并将其作为高级氧化反应的催化剂,活化亚硫酸盐降解水体污染物橙黄Ⅱ。材料表征结果表明,磷化铁的主要组成成分为Fe₂P和Fe₃P。在较优的催化条件下,经120 min吸附和催化联合处理,模拟废水中10 mg/L的橙黄Ⅱ可以被完全去除。催化反应机理分析表明,磷化铁/生物碳复合材料通过活化亚硫酸盐产生硫酸根自由基和羟基自由基,进而实现了橙黄Ⅱ的氧化降解。

Severe pollution of aquatic environments impacts detrimentally both ecological systems and human health.Dye-containing wastewater is one of the typical representatives.Yeast cell is chosen as both phosphorus and carbon precursors,which is converted to iron phosphide/biocarbon composite through a coprecipitation-anoxic pyrolysis approach.The as-obtained iron phosphide/biocarbon composite is applied as the catalyst in advanced oxidation reaction,which can activate sulfite to degrade orange Ⅱ dye,a pollutant in water.Material characterization indicates that iron phosphide is composed of Fe₂P and Fe₃P.Under the optimized catalytic conditions,10 mg·L^-1 of orange Ⅱ dye in simulated wastewater can be completely removed after 120 minutes of adsorption and catalysis treatment over the catalyst.Further reaction mechanism analysis proves that the iron phosphide/biocarbon composite activates sulfite to generate sulfate radicals and hydroxyl radicals,which are responsible for the oxidation of orange Ⅱ Dye.

高子航(1999-),男,硕士生,研究方向为高级氧化技术降解环境中的污染物,1521105434@qq.com;王雅博(1985-),男,博士,副教授,研究方向为生物质转化、微生物矿化和环境催化,通讯联系人,ybwang@scu.edu.cn。