摘要
为筛选吸附磷效果较好的填料,选取19种水处理中用到的填料进行吸附解吸实验。结果表明,Freundlich、Langmuir和Redlich-Peterson模型均能较好地拟合各填料对磷的吸附特征;通过Langmuir模型计算,钢渣、高岭土、麦饭石、无烟煤、火山岩、生物炭、瓷砂陶粒对磷的理论饱和吸附量较大;同时,同种填料,粒径越小,理论饱和吸附量越大。吸附饱和的火山岩、麦饭石、活性炭、海绵铁等填料对磷的稳定能力较差,易于释放到水中,粒径越小,稳定性越差。从吸附解吸性能的角度考虑,钢渣、无烟煤、高岭土、瓷砂陶粒等是湿地填料较好的选择。
In order to find out better adsorbents for phosphorus,nineteen substrates which applied in constructed wetland were selected to launch isothermal adsorption and desorption experiment.The results showed that Freundlich,Langmuir and Redlich-Perterson isotherms could well fit the adsorption and desorption process.Estimated from the Langmuir isotherm,phosphorus adsorption by steel slag,kaolin,maifan stone,anthracite,volcanic rock,biological carbon and porcelain ceramist for phosphorus was theoretically good.Meanwhile,substrates in small particle size showed better theoretical maximum adsorption capacity than ones of big particle size.Saturated substrates such as volcanic rock,Maifan stone,activated carbon and sponge iron were instable,which were prone to release phosphorus to water.The smaller particle size was,the poorer the stability of substrates was.In consideration of adsorption and desorption performance,steel slag,anthracite,kaolin and porcelain ceramist were appropriate candidates for constructed wetlands.
出处
《水处理技术》
CAS
CSCD
北大核心
2015年第4期35-39,44,共6页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2012ZX07105-002,2013ZX07101-014)
中央级公益性科研院所基本科研业务专项(2012-YSKY-14)
国家自然科学基金(41373027)
关键词
填料
人工湿地
磷吸附
解吸
substrate
constructed wetland
phosphorus adsorption
desorption
