焦磷酸根在即时合成阴离子粘土结构中的嵌入作用

INTERCALATION OF P_2O_7^(4-) IN ANIONIC CLAY STRUCTURE SYNTHESIZED IN SITU

污染物在矿物结构中的嵌入是固化、净化污染物的一种有前景的矿物学方法。焦磷酸根离子是工业废水中较难处理的工业磷污染源之一,研究新的除磷技术是水污染控制技术领域的重要课题之一。通过人工配制焦磷酸盐废水,初步研究镁-铝盐水解共沉淀法即时合成阴离子粘土去除焦磷酸根的效果、影响因素和焦磷酸根离子在阴离子粘土结构中的嵌入作用。研究结果表明,通过镁-铝盐水解共沉淀法即时合成阴离子粘土,焦磷酸根离子有效地嵌入阴离子粘土结构中,对焦磷酸根有非常好的去除效果。影响处理效果的主要因素是pH值和M g/A l比值。pH值为9.0~10,M g/A l比1∶1~3∶1时,都可以获得较好的去除效果。

Intercalation of pollutants in mineral structure is a novel method of immobilization and purification pollutants. P2O7^4- is an important industrial pollution source because it is difficult to treat it. Developing novel technology for treatment of wastewater containing P2O7^4- is an exigent task in the environmental field. Efficiency and effect factors of polymer phosphate removal from simulated wastewater containing P2O7^4- through Mg^2＋ and Al^3＋ co-precipitating and P2O7^4- intercalation in anionic clay structure synthesized in situ were investigated in this paper. The resuits indicate that impacting factors on removal efficiency of polymer phosphate are pH and Mg/ Al ratio and polymer phosphate is intercalated into anionic clay structure during Mg and A1 coprecipitation and synthesis anionic clay in situ. The great removal efficiency of polymer phosphate can be obtained when pH value arranges from 9.0-10 and Mg/Al ratios 1 ： 1-3 ： 1,meanwhile