多环芳烃污染农田土壤原位生物修复技术研究的中期报告.docx

多环芳烃污染农田土壤原位生物修复技术研究的中期报告
摘要
多环芳烃（PAHs）是一类存在于许多化学物质中的有机化合物，其对人类和环境的危害性已被广泛认可。由于PAHs的化学稳定性和难以降解的特点，它们往往在土壤中积累，并持久存在，严重影响了土壤的生态和农业生产。为解决PAHs污染的问题，许多研究者探索了各种修复技术，其中生物修复技术因具有经济、高效和环保等优点而备受关注。
本研究旨在探讨生物修复技术在解决PAHs污染农田土壤中的应用，以评估其可行性和效果。为此，在实验室条件下，采用多年生草类植物吊灯芒与菜豆作为生物修复剂，研究其对PAHs污染的土壤的修复效果。实验结果表明，吊灯芒和菜豆均能在PAHs存在的情况下生长，并对PAHs进行降解和吸附，其中吊灯芒的修复效果优于菜豆。此外，随着生物修复剂添加量的增加，土壤中PAHs的降解率也逐渐提高，但是过高的添加量会抑制生物修复剂的降解能力。
综上所述，生物修复技术在解决PAHs污染农田土壤中具有较高的潜力和可行性。在实际应用中，可以通过选取适宜的生物修复剂和优化添加剂量等措施来提高修复效果。
关键词：多环芳烃；农田土壤；生物修复；吊灯芒；菜豆
Abstract
Polycyclicaromatichydrocarbons(PAHs)areorganiccompoundsfoundinmanychemicals,theirharmtohumansandtheenvironmenthasbeenwidelyrecognized.DuetothechemicalstabilityanddifficultdegradationofPAHs,theyoftenaccumulateinsoils,persistingandseriouslyaffectingsoilecologyandagriculture.ToaddressPAHpollution,manyresearchershaveexploredvariousremediationtechnologies,andbioremediationtechnologyhasreceivedattentionforitseconomics,efficiency,andenvironmentalprotection.
ThisstudyaimstoexploretheapplicationofbioremediationtechnologyinsolvingtheproblemofPAHpollutioninfarmlandsoil,toevaluateitsfeasibilityandeffectiveness.Underlaboratoryconditions,thelong-livedgrassesPennisetumalopecuroidesandpulsesVignaradiatawereusedasbioremediationagentstostudytheirremediationeffectsonsoilcontaminatedwithPAHs.TheresultsshowedthatbothPennisetumalopecuroidesandVignaradiatacouldgrowinthepresenceofPAHsanddegradeandadsorbPAHs,withPennisetumalopecuroidesshowingbetterremediationefficiencythanVignaradiata.Inaddition,astheamountofbioremediationagentsaddedincreased,thedegradationrateofPAHsinthesoilgraduallyincreased,butexcessiveadditioninhibitedthebioremediationagents'degradationcapacity.
Inconclusion,bioremediationtechnologyhashighpotentialandfeasibilityinsolvingPAHpollutioninfarmlandsoil.Inpracticalapplications,remediationeffectscanbeimprovedbyselectingappropriatebioremediationagentsandoptimizingadditiveamounts.
Keywords:Polycyclicaromatichydrocarbons;Farmlandsoil;Bioremediation;Pennisetumalopecuroides;Vignarad