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
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摘要
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 reinforced matrix has a single function, the strengthening effect needs to be strengthened, it is necessary to research and develop sustained release oxygen-based materials,which are doped with other functional materials,to prepared new type of ecological ditch artificial matrix materials and find the best formula to effectively improve the dissolved oxygen concentration at the ecological ditch water and soil interface through the comparison of different materials.The results showed that ORC-1 prepared from 45% CaO_2, 10% activated carbon, 5% zeolite, 15% quartz sand, 5% attapulgite, 15% normal portland cement and 5% montmorillonite.The specific surface area, pore volume and porosity were 93.063 7 m~2/g, 0.388 7 mL/g and62.9%, respectively. The oxygen release capacity was the strongest and the cmvalue was 12.137 mg/L. At the moment, the removal efficiency of nitrogen and phosphorus was the best.
Because the current ecological ditch adsorbent reinforced matrix has a single function, the strengthening effect needs to be strengthened, it is necessary to research and develop sustained release oxygen-based materials,which are doped with other functional materials,to prepared new type of ecological ditch artificial matrix materials and find the best formula to effectively improve the dissolved oxygen concentration at the ecological ditch water and soil interface through the comparison of different materials.The results showed that ORC-1 prepared from 45% CaO_2, 10% activated carbon, 5% zeolite, 15% quartz sand, 5% attapulgite, 15% normal portland cement and 5% montmorillonite.The specific surface area, pore volume and porosity were 93.063 7 m~2/g, 0.388 7 mL/g and62.9%, respectively. The oxygen release capacity was the strongest and the cmvalue was 12.137 mg/L. At the moment, the removal efficiency of nitrogen and phosphorus was the best.
引文
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[3]张春旸,李松敏,牛文亮,等.生态沟渠对农田氮、磷拦截效果的试验研究[J].天津农学院学报,2017,24(2):72-76.
[4]吴攀,张志山,黄磊,等.人工布设基质对农田排水沟水质的影响[J].中国生态农业学报,2012,20(5):578-584.
[5]张燕,祝惠,阎百兴,等.排水沟渠炉渣与底泥对水中氮、磷截留效应[J].中国环境科学,2013,33(6):1 005-1 010.
[6]周彦波,王英秀,周振华,等.过氧化钙缓释氧剂的制备及其释氧特性研究[J].中国给水排水,2012,28(7):64-67.
[7]刘涉江,姜斌,李鑫钢,等.过氧化钙释氧过程中碱度调控方法的研究[J].中国给水排水,2009(11):79-82.
[8]张启超,杨鑫,孙淑雲,等.过氧化钙在处理厌氧底泥中的应用初探[J].湖泊科学,2015,27(6):1 087-1 092.
[9]李明,朱晓明,阮晓红,等.包裹缓释外壳的缓释氧材料的性能影响分析[J].地下水,2012,34(6):173-175.
[10]LIN Chen,WU Zhi-peng,MA Rong-hua,et al.Detection of sensitive soil properties related to non-point phosphorus pollution by integrated models of SEDD and PLOAD[J].Ecological indicators,2016,60:483-494.