6种人工湿地填料对氮·磷的吸附效果研究
2016-10-21李琼辉于伟鹏李小荣等
李琼辉 于伟鹏 李小荣等



摘要[目的]探讨6种人工湿地填料对水体中氨氮、总磷污染物的处理效果。[方法]通过静态摇床试验,研究沸石、火山石、蛭石、柱状活性炭、生物陶粒、无烟煤填料吸附氨氮和总磷的能力,建立各填料等温吸附模型。[结果]沸石对氨氮的吸附效果最好,蛭石、火山石次之,而柱状活性炭、生物陶粒、无烟煤对氨氮的吸附效果较差;柱状活性炭、火山石对总磷的吸附效果较好,其他填料对总磷的吸附效果较差;6种填料的等温吸附过程的拟合结果符合Freundlich吸附模型。[结论]从吸附氨氮、总磷性能的角度考虑,沸石、火山石是人工湿地填料较好的选择。
关键词人工湿地;填料;氮;磷
中图分类号S181文献标识码A文章编号0517-6611(2016)04-083-04
Study on the Adsorption Effect of Six Artificial Wetland Substrates on Nitrogen and Phosphorus
LI Qinghui,YU Weipeng*,LI Xiaorong et al (Shenzhen Techand Ecoenvironmental Co.Ltd.,Shenzhen,Guangdong 518040)
Abstract[Objective] The aim was to discuss the processing effect of six artificial wetland substrates on ammonia nitrogen,total phosphorus in water.[Method] The adsorption of ammonia nitrogen and phosphorus of six constructed wetland substrates,including zeolite,volcanic rock,vermiculite,columnar activated carbon,bioceramic and anthracite,were studied by static shaking experiments and isothermal adsorption model was established.[Result] According to experiment results,for ammonia nitrogen adsorption,zeolite performed the best,followed by vermiculite and volcanic rock; for phosphorus adsorption,columnar activated carbon and volcanic rock were both in the top position.The adsorption isotherm of the results was in accordance with the Freundlich isotherm adsorption model.[Conclusion] Considering the adsorption of ammonia nitrogen and total phosphorus,zeolite,volcanic rock are better choice for artificial wetland substrates.
Key wordsConstructed wetland; Substrates; Nitrogen; Phosphorus
隨着城市经济、工业的快速发展,河流、湖泊的富营养化污染日益加剧,严重破坏了水体生态环境,其中,对造成水体富营养化的主要物质氮、磷的控制十分迫切。人工湿地污水处理系统作为一种生态式的污水处理技术已得到广泛应用,其主要通过植物、微生物、填料的作用进一步削减城市排水中的污染物[1-2]。其中,填料作为人工湿地的重要组成部分,对于人工湿地的污水处理效果有着重要的促进作用[3-4]。目前,人工湿地主要应用沙粒、砾石、碎石作为填料,但是研究发现他们对氮、磷的处理能力有限[5]。鉴于此,笔者选择常见的4种天然矿物材料(沸石[6-7]、蛭石[8-9]、火山石[10]、无烟煤)和2种人工合成材料(活性炭粒、生物陶粒)作为人工湿地基质,研究了这6种材料对氨氮、总磷吸附处理效果及吸附等温过程,旨在为人工湿地填料的选择应用及进一步提高人工湿地系统的污水处理能力提供基础数据和理论指导。……
