Lead stabilization in a polluted calcareous soil using cost-effective biochar and zeolite amendments after spinach cultivation

作     者：Hamid Reza BOOSTANI Ailsa G.HARDIE Mahdi NAJAFI-GHIRI Hamid Reza BOOSTANI;Ailsa G.HARDIE;Mahdi NAJAFI-GHIRI

作者机构：Department of Soil ScienceCollege of Agriculture and Natural Resources of DarabShiraz UniversityDarab 74591(Iran) Department of Soil ScienceFaculty of AgriSciencesStellenbosch UniversityPrivate Bag X1Matieland 7602(South Africa) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2023年第33卷第2期

页      面：321-330页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理] 

主　　题：chemical fraction mobility factor municipal waste biochar plant Pb uptake release kinetics sequential extraction 

摘      要：Biochar has been shown to be an effective organic soil amendment for the in-situ immobilization of lead(Pb).Little research has been done on the effects of biochar and zeolite interactions on Pb immobilization in contaminated calcareous ***,the aim of this study was to investigate the effects of different levels of zeolite(2%and 4%,weight:weight)and biochars(3%,weight:weight)prepared from green compost(GB),poultry manure(PB),and municipal waste(MB)on the content of Pb in spinach shoots and Pb stabilization in a greenhouse experiment conducted using a Pb-contaminated calcareous *** of GB and PB significantly decreased the Pb mobility factor(MF)from 2.8%to 4.6%and the cumulative Pb release(diethylenetriamine pentaacetate(DTPA)extraction)from 16.8%to 20.1%in the calcareous soil,which were further enhanced by the combined addition of zeolite,with Pb MF reduction from 4.4%to 8.4%and cumulative Pb release reduction from 24.8%to 28.6%.The enhancement of soil Pb immobilization was attributed to the properties of the amendments,such as high pH,ash content,and phosphorus content(10.5^(-1)1.0,390-435 g kg^(-1),and 2.5-4.3 g kg^(-1),respectively).Results of the soil Pb sequential extraction and Pb release kinetics were highly and significantly correlated with spinach shoot Pb *** chemical data showed that the application of MB with 4%zeolite was the most effective treatment for immobilizing Pb(8.4%reduction in Pb MF and 28.6%reduction in cumulative DTPA-extractable Pb),which is in agreement with the results of the spinach shoot Pb(89.0%reduction in Pb uptake).