三种花卉植物对重金属污染土壤的修复初探

三种花卉植物对重金属污染土壤的修复初探摘要：随着工业化和城市化进程的加速，土壤重金属污染成为了一个不容忽视的生态环境问题。本文研究了三种花卉植物(紫花泡芙、罗文蔓掌、紫花苜蓿)对重金属污染土壤的修复效

三种花卉植物对重金属污染土壤的修复初探 摘要： 随着工业化和城市化进程的加速，土壤重金属污染成为了一个不容 忽视的生态环境问题。本文研究了三种花卉植物(紫花泡芙、罗文蔓掌、 紫花苜蓿)对重金属污染土壤的修复效果及其机理。研究结果表明，紫花 泡芙和罗文蔓掌对Cu、Cd、Pb等重金属的吸收和富集作用较强，而紫 花苜蓿更适合用来修复铅污染土壤。此外，三种植物均可显著提高土壤 的酶活性和微生物数量，促进土壤微生物群落结构和功能的恢复。因 此，在修复重金属污染土壤方面，花卉植物具有较大的应用前景。 关键词：重金属污染；花卉植物；修复效果；酶活性；微生物数量 Introduction: Soilheavymetalpollutionhasbecomeanimportant ecologicalandenvironmentalproblemwiththeaccelerationof industrializationandurbanizationprocess.Itnotonlyaffectsthe qualityofsoil,butalsothreatensthehumanhealththroughthe foodchain.Inordertoprotectandrestoretheecological environment,manyresearchershavestudiedthe phytoremediationofheavymetalcontaminatedsoil.Asan economicalandeffectivetechnique,phytoremediationhasbeen widelyusedtopurifythecontaminatedsoil.Inthisstudy,three flowerplants(ViolatricolorL.,TradescantiazebrinaHort.exBosse, andMedicagosativaL.)werechosentoinvestigatetheirpotential forremediationofheavymetalcontaminatedsoilandthe mechanisminvolved. MaterialsandMethods: Thestudywasconductedinagreenhousewithtemperature controlledat25±2°C,relativehumidityat60%,anda16-hour light-8hourdarkphotoperiod.Thesoilusedintheexperiment wasobtainedfromasitecontaminatedwithheavymetals(Cu,Cd, Pb).Aftermixingwithsandandcompost,thesoilwassterilizedby autoclavingat121°Cand0.1MPafor120minthreetimes.Thesoil wasthendividedintothreepartsandplantedwithViolatricolorL., TradescantiazebrinaHort.exBosse,andMedicagosativaL., respectively,withacontrolgroupwithoutanyplantings.