过氧化钙和海绵铁悬挂对景观水的净化效果  

Performance of Calcium Peroxide and Sponge Iron Suspension for Purifying Landscape Water

作　　者：朱政 王怡[1] 王文怀 韩雪宜 ZHU Zheng;WANG Yi;WANG Wen‑huai;HAN Xue‑yi(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Northwest China Key Laboratory of Water Resource and Environment Ecology,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055

出　　处：《中国给水排水》2024年第7期79-84,共6页China Water & Wastewater

基　　金：国家自然科学基金资助面上项目(52170172);陕西省重点产业创新链(群)项目(2021ZDLSF05-04);西安市科技局社会发展科技创新示范项目(20SFSF0011)。

摘　　要：针对传统生态浮床净化景观水时氮、磷营养盐及藻类和难降解有机物去除效果差的问题,通过模拟试验,探究了不同质量比的过氧化钙(CP)和海绵铁(SI)悬挂对景观水的净化效果及机理。结果表明,CP和SI组合填料对水中氮、磷营养盐有较好的去除效果,且当CP和SI的质量比为1∶8时处理效果最佳,对水中NO_(3)^(-)-N、NO_(2)^(-)-N和PO_(4)^(3-)-P的去除率分别可达到98.56%、100%和85.91%。同时,CP和SI溶解产生的H2O2及Fe(Ⅱ)通过类Fenton反应产生强氧化性的·OH,可有效降低水中的藻密度并转化有机物,藻密度去除率可达到83.75%,同时富里酸浓度明显降低。此外,CP和SI可强化沉淀和吸附作用对水中磷的去除,并将易释放磷转变为稳定存在的钙磷(Ca-P),减少沉积磷的再释放风险。This paper investigated the performance and mechanism of calcium peroxide(CP)and sponge iron(SI)with different mass ratios for purifying landscape water through simulation tests,so as to solve the problem of poor performance of traditional ecological floating bed for removing nitrogen,phosphorus,algae and refractory organic matters from landscape water.The combination of CP and SI achieved good removal performance of nitrogen and phosphorus in water,the optimal treatment performance was obtained when the mass ratio of CP and SI was 1∶8,and the removal rates of NO_(3)^(-)-N、NO_(2)^(-)-N and PO_(4)^(3-)-P reached 98.56%,100%and 85.91%,respectively.Meanwhile,·OH with strong oxidizing ability generated in the Fenton‑like reaction between H2O2 and Fe(Ⅱ)produced by dissolution of CP and SI effectively reduced the density of algae in water and disintegrated the organic matters.The removal rate of algae density reached 83.75%,and the concentration of fulvic acid was significantly reduced.In addition,CP and SI enhanced the removal of phosphorus from water by precipitation and adsorption,and transformed easily released phosphorus into stable Ca-P,which reduced the risk of re‑release of deposited phosphorus.

关 键 词：景观水 过氧化钙 海绵铁 填料配比 类芬顿反应 生态浮床 

分 类 号：TU992[建筑科学—市政工程]