生态沟渠人工强化净化基质材料在面源污染控制中的应用

Application of Artificial Reinforcement and Purification Substrate for Ecological Drainage in Non-point Source Pollution Control

针对目前生态沟渠吸附剂类强化基质功能单一、强化效果有待加强的状况,研发以缓释氧材料为主,掺杂其他功能材料制备的新型生态沟渠人工基质材料,通过不同材料配比的比较,寻求最佳配方,以有效提高生态沟渠水土界面处DO(溶解氧)浓度。研究结果表明,按45%CaO_2、10%活性炭、5%沸石、15%石英砂、5%凹凸棒土、15%普通硅酸盐水泥和5%蒙脱石制得的ORC-1具有较大的比表面积、孔容和孔隙率,分别为93.063 7 m^2/g,0.388 7 mL/g和62.9%;且释氧能力最强,cm值(单位质量材料释放的DO平衡质量浓度)达到12.137 mg/L;对N,P的去除效果最好。

Because the current ecological ditch adsorbent reinforcedmatrix has a single function, the strengthening effect needs tobe strengthened, it is necessary to research and develop sustained release oxygen-based materials ,which are doped with otherfunctionalmaterials,topreparednewtype of ecological ditchartificialmatrixmaterials andfindthe best formula to effectively improvethe dissolved oxygen concentration at the ecological ditch water and soil interface through the comparison of different materials .Theresults showed thatORC-1 prepared from45%CaO2, 10%activated carbon, 5%zeolite, 15%quartz sand, 5%attapulgite, 15%normalportland cement and 5%montmorillonite.The specific surface area, pore volume and porosity were 93.063 7m2/g, 0.388 7 mL/g and62.9%, respectively. The oxygen release capacity was the strongest and the m value was 12.137 mg/L. At the moment, the removalefficiency ofnitrogenand phosphoruswas thebest.