人工湿地填料磷去除效果的影响因素分析.pdf

农业环境科学学报2008，27(2)：748—752
JournalofAgro—EnvironmentScience

人工湿地填料磷去除效果的影响因素分析

汤显强，李金中2，刘学功2，黄岁棵

(1．南开大学环境科学与工程学院，天津300071；2．天津市水利科学研究所，天津300061)

摘要：为分析人工湿地填料磷去除效果的影响因素，选取页岩、粗砾石、铁矿石、麦饭石等不同填料进行等温磷吸附实验和室内
小试磷去除研究。结果表明，填料类型和粒径影响填料磷吸附性能。上述填料磷吸附性能依次为页岩>铁矿石>麦饭石>粗砾石且
页岩最大磷吸附量随粒径增加而减小。水力负荷(HLA)变化对不同填料磷去除效率影响效果不同，当HLA从200mm·d降至
142．8mil1．d-m时．粗砾石构建湿地总磷去除率增加大约10％；麦饭石因为吸附渐进饱和总磷去除率呈现出不断下降趋势；铁矿石可
能受微生物影响导致Fe等金属元素释放，总磷去除率从大约6％(HLA=200mm·d)上升至35％(HLA=142．8mm·d。)左右；页岩受
HLA变化影响较小，总磷去除率基本稳定在80％以上。综合上述实验结果发现填料种类、粒径及水力负荷均影响湿地填料磷去除
效果。
关键词：湿地；填料；磷去除；水力负荷
中图分类号：X703．1文献标识码：A文章编号：1672—2043(2008)02—0748—05

InfluencingFactorsofPhosphorusRemovalPerformanceofConstructedWetlandsSubstrates

TANGXian—qiang‘，LIJin-zhong：，LIUXue-gong：，HUANGSui—liang
(1．CoUegeofEnvironmentalScienceandEngineering，NankaiUniversity，Tianjin300071，China；2．TianjinHydraulicScientificResearch
Institute，Tianjin300061，China)
Abstract：Inordertoanalyzethefactorsthatinfluencedphosphorusremovalperformanceofconstructedwetlandssubstrates，shale，course

gravel，ironstoneandhornblendewereusedtoconductthephosphorusisothermaladsorptionexperimentandindoorpilot—scalephosphorus

removalresearch．Phosphorusisothermaladsorptionexperimentalresultsindicatedthatsubstratetypesandgrainsizescouldbothinfluence

phosphorusremovalcapacities．Therewasanorderinrankforphosphorusadsorptioncapacitiesofthefoursubstratesmentionedabove：

shale>ironstone>hornblende>coursegravelandthemaximumphosphorusadsorptioncapacityofshaleincreasedasthegrainsizeofthema—

terialdecreased．TPD[~movaleficiencyofindoor-pilotscaleconstructedwetlandswithdifferentsubs~atesvariedwithhydraulicloadingrate

fHLA1．WhenHLAwasdeclinedfrom200mm·d～to142．8mm·d～，TPremovalrateofcoupegravelbedconstructedwetlandincreased

about10％．whilehornblendebedappeareddepressivetIlendsincethesubstrateachievedsaturatedadsorptiongradually．Ironstonethatwas
maybeafectedbytheactionofmicroorganismsledtotheincreaseofTPremovalratesfromabout6％(HLA=200mm·d)toapproximately
35％(142．8mm·d-1)，owingtothereleaseof