Phytoremediation of Pb Spiked Soils Amended with Iron ImpregnatedRice Husk Ash Using Ricinus communis L. (Castor bean)  

作　　者：Boda Ravi Kiran M.N.V.Prasad 

机构地区：[1]Department of Plant Sciences,School of Life Sciences,University of Hyderabad,Hyderabad,Telangana,500046,India

出　　处：《Journal of Botanical Research》2019年第3期1-7,共7页植物研究（英文）

基　　金：The author grateful acknowledges the RGNF-UGC and University of Hyderabad,India。

摘　　要：Heavy metals pose a serious risk to the environment and living biota. Potstudies were carried out to determine the competence of Fe-coated ricehusk in Pb spiked soils vegetated with Ricinus communis. Physicochemicalproperties of Fe- coated rice husk ash (Fe-RHA) were characterizedon dry weight basis. Pot experiments were carried out with seedlings ofR.communis for 60 days amended with Fe-RHA (0, 2.5% and 5% w/w)and Pb(NO3) [0, 400 and 800 mg kg?1]. Addition of Fe-coated rice huskash to Pb cntaminated soils improved soil pH and fertility. Treatment with5% Fe-RHA decreased Pb accumulation in roots by 84%. Addition of Fe-RHA significantly (p<0.05) increased plant physiological parameters suchas height, leaf diameter, nodes, and leaf number by 64%, 49%, 62% and66% and chlorophyll contents (12–29%) compared to unamended plants.Our findings conclude that Fe-RHA is a low-cost, environmentally friendlyand efficient adsorbent for stabilization of Pb spiked soils.

关 键 词：Fe-coated rice husk ASH Lead Adsorption IMMOBILIZATION RICINUS communis 

分 类 号：S15[农业科学—土壤学]