人工湿地生物沸石快速吸附-再生性能与再生机理研究  

Study on the rapid adsorption-regeneration performance of bio-zeolite and its regeneration mechanism in a constructed wetland

作　　者：沈志强[1,2] 牟锐[1,3] 李元志[4] 周岳溪[1,2] 周继红[4] 陈学民[3] 伏小勇[3] 

机构地区：[1]中国环境科学研究院水污染控制技术研究中心,北京100012 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]兰州交通大学环境与市政工程学院,兰州730070 [4]河北工程大学城市建设学院,邯郸056038

出　　处：《环境科学学报》2016年第4期1242-1247,共6页Acta Scientiae Circumstantiae

基　　金：国家科技支撑计划课题(No.2012BAJ21B01-02);中国博士后科学基金(No.2012M520351)~~

摘　　要：在填充生物沸石和石灰石的强化硝化模拟人工湿地中,考察了生物沸石快速吸附-再生动态平衡性能和生物沸石再生的机理.研究结果表明,生物沸石模拟人工湿地中硝化作用明显,产生的氧化态氮主要为硝氮,平均浓度为106.31 mg·L^(-1)(大于吸附去除的氨氮浓度).模拟人工湿地出水中的金属阳离子主要为Na+和Ca^(2+),30 d后Ca^(2+)浓度大于Na+浓度.生物沸石的再生是离子交换释放氨氮和微生物协同作用的结果.石灰石缓慢释放的Ca^(2+)可促进生物沸石再生,生物沸石与石灰石投加量的最佳质量比为5∶1.生物沸石再生过程中,微生物起主导作用.In a constructed wetland filled with bio-zeolite and limestone,the adsorption behavior,biological regeneration dynamic equilibrium performance and the biological regeneration mechanism of bio-zeolite were investigated. The results show that in the constructed wetland with bio-zeolite,nitrification occurred obviously and the product primarily was NO-3-N,with the average concentration of 106. 31 mg·L-1,which is higher than the adsorbed ammonia nitrogen concentration. In the effluent of the constructed wetland,the main metal cations were Na＋and Ca（2＋）,and the concentration of Ca（2＋）was higher than Na＋after 30 d. The regeneration of bio-zeolite was the result of synergistic effect of ion exchange releasing ammonia nitrogen and nitrification. Ca（2＋）slowly-released from limestone could promote the regeneration of bio-zeolite, and the optimum mass ratio of bio-zeolite to limestone was 5 ∶ 1.Microorganisms played a significant role in the process of the regeneration of bio-zeolite.

关 键 词：生物沸石 人工湿地 氨氮 硝化 再生 

分 类 号：X703[环境科学与工程—环境工程]