4种蓼属植物对模拟生活污水的脱氮除磷效果  

Effects of Four Species of Polygonum on Nitrogen and Phosphorus Removal from Simulated Domestic Sewage

作　　者：李哲 王巧红[2] 郑子成 李廷轩 LI Zhe;WANG Qiaohong;ZHENG Zicheng;LI Tingxuan(College of Resources,Sichuan Agricultural University,Chengdu 611130,China;Sichuan Water Conservancy Vocational College,Chengdu 611231,China)

机构地区：[1]四川农业大学资源学院,成都611130 [2]四川水利职业技术学院,成都611231

出　　处：《水土保持学报》2024年第4期362-370,共9页Journal of Soil and Water Conservation

基　　金：四川农业大学学科建设双支计划特色创新团队项目(T202103);国家自然科学基金项目(31972499)。

摘　　要：[目的]为探明蓼属植物的净水能力,以期明晰蓼属植物应用于生活污水修复的可行性。[方法]选取水蓼(Polygonum hydropiper)、红蓼(Polygonum orientale)、叉分蓼(Polygonum divaricatum)、酸模叶蓼(Polygonum lapathifolium)为研究对象,通过模拟水培试验,探讨4种蓼属植物对2种浓度生活污水中总氮(TN)、铵态氮(NH_(4)^(+)-N)、硝态氮(NO_(3)^(-)-N)、总磷(TP)的去除效果及蓼属植物对污水中氮磷的积累能力。[结果](1)4种蓼属植物对于2种浓度生活污水中的氮磷均有较好的去除效果。(2)高浓度污水处理下,红蓼、叉分蓼和酸模叶蓼对TN、NH_(4)^(+)-N和TP的去除率分别为96.04%~97.41%,94.60%~97.79%和98.78%~99.68%(28天),均显著高于水蓼(p<0.05)。(3)低浓度污水处理下,4种蓼属植物地上部氮磷积累量分别为27.38~37.47 mg/plant和7.65~10.11 mg/plant,植物间差异不显著;高浓度污水处理下,红蓼氮积累能力较强,地上部氮积累量达57.16 mg/plant,酸模叶蓼磷积累能力较强,地上部磷积累量达15.32 mg/plant,水蓼氮磷积累能力均较弱。[结论]4种蓼属植物均可用于修复较低浓度的生活污水,污水浓度较高时宜选择红蓼、叉分蓼和酸模叶蓼作为修复材料。研究结果为生活污水修复的植物材料选择提供参考。[Objective]To investigate the water purification capabilities of Polygonum species and assess their suitability for the remediation of domestic sewage.[Methods]Polygonum hydropiper,Polygonum orientale,Polygonum divaricatum and Polygonum lapathifolium were selected as the research objects.The removal effects of total nitrogen(TN),ammonium nitrogen(NH_(4)^(+)-N),nitrate nitrogen(NO_(3)^(-)-N),and total phosphorus(TP)in two concentrations of domestic sewage by these four species of Polygonum were discussed through a simulated hydroponic experiment.Additionally,the accumulation ability of Polygonum species to nitrogen and phosphorus in sewage was examined.[Results](1)All four species of Polygonum exhibited good removal effects on nitrogen and phosphorus in two concentrations of domestic sewage.(2)Under high concentration sewage treatment,the removal rates of TN,NH_(4)^(+)-N and TP by Polygonum orientale,Polygonum divaricatum and Polygonum lapathifolium were 96.04%~97.41%,94.60%~97.79%and 98.78%~99.68%(28 days),respectively,which were significantly higher than those of Polygonum hydropiper(p<0.05).(3)Under low concentration sewage treatment conditions,the shoot nitrogen and phosphorus accumulation of four species of Polygonum were 27.38~37.47 mg/plant and 7.65~10.11 mg/plant,respectively,with no significant difference between plants;Under high concentration sewage treatment,Polygonum orientale exhibits a strong nitrogen accumulation capability,with shoot nitrogen accumulation reaching 57.16 mg/plant,while Polygonum lapathifolium exhibits a strong phosphorus accumulation capability,with shoot phosphorus accumulation reaching 15.32 mg/plant.Conversely,Polygonum hydropiper displays weak nitrogen and phosphorus accumulation abilities.[Conclusion]These findings indicate that all four Polygonum species can be used to the remediation of low-concentration domestic sewage.Among them,Polygonum orientale,Polygonum divaricatum,and Polygonum lapathifolium are more suitable for treating high-concentration sewage.This study offers v

关 键 词：生活污水 蓼属植物 氮磷去除 氮磷积累 

分 类 号：X173[环境科学与工程—环境科学]