两种改性材料修复镉污染菜地的应用研究

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文章编号：1674-6139（2025）12-0056-06

中图分类号：X53文献标志码：B

Abstract：Throughpotandfieldexperiments，theefectsofthiolatedmontmorillonite（QJ）andmodifiedmonmorllonitecomposite （MF）onreducgthebsoodcuulatioofCdinretetisofegeableseeiestigated，icproedece fortheirwideaplicationinemediationofCd-ontaminatedvegetablefields.Inthepotexperiment，theCdcontentsinteshootsfpa kchoi planted under 0.5% and 1% treatments decreased by 87.2% ， 91.0% （QJ），and 60.1% ， 80.4% （MF），respectively，compared with the blank control.In the field experiment，after planting leek，pepper，and red amaranth with 0.1% treatment，the Cd contents in the edible parts of the three vegetables decreased by 5.63～37.3% （QJ）and 28.6～64.9% （MF），respectively，compared with the control，and the corresponding available Cd contents in soil reduced by 22.5～26.5% and 17.6～32.9% ．A significant positive correlation is observed between Cd contents in theedibleparts of vegetablesandavailableCd contents insoils.Thesoil pH values did not change significantlyafterQJtreatments，whileincreasedbyaboutO.5unitsonaverageafterMFtreatmentsBothmodifiedmaterialsshoweda good passivation effect，and MF had a better effect.

Keywords：vegetablecropland;；cadmiumcontamination；pasivationremediation；thiolatedmontmorilonite（QJ）；modifiedmontmorillonite composite（MF）

前言

中国农用地土壤遭受严峻的重金属超标困扰，尤以镉（Cd）最明显，且呈现由北至南逐渐升高的态势，南方镉污染重于北方[1]。（剩余6590字）