PRB修复受硝酸盐污染地下水的碳源材料研究进展

Research Progress of PRB Carbon Source Materials for Groundwater Rehabilitation Polluted by Nitrate

可渗透反应墙(PRB)技术是一种可靠、高效、低成本地修复受硝酸盐污染地下水的手段。文中介绍了PRB技术采用的各类碳源材料,分析对比了各类碳源材料的优缺点。液相碳源材料中,乙醇是最为理想的碳源材料,水解发酵污泥处理后获得的挥发性脂肪酸(VFAs)是未来的研究方向。固相碳源材料中,改性天然材料具有成本低廉、反硝化效果优异、释碳稳定的优点,以纤维素为碳源,可生物降解塑料为骨架的新型缓释碳源材料是未来应用的热点。

Permeable reactive barrier(PRB)technology is a reliable,efficient and low-cost means to rehabilitation groundwater polluted by nitrate.Various carbon source materials used in PRB technology were introduced,and their advantages and disadvantages were analyzed and compared.Among the liquid carbon source materials,ethanol is the most ideal carbon source material.Volatile fatty acids(VFAs)obtained after hydrolysis and fermentation of sludge are the future research directions.Among solid carbon source materials,modified natural materials have the advantages of low cost,excellent denitrification effect and stable carbon release,and a new type of slow-release carbon source material with cellulose and biodegradable plastics as skeleton is a hot spot in the future.