Interaction of Cd and citric acid, EDTA in red soil

Adsorption and desorption process of cadmium in redsoil(Ferrisols) as well as the influence by media's pH were investigated in detail with and without citric acid and EDTA. Experimental results clearly showed that Cd adsorption in red soil was affected significantly by the coexisted organic chemicals. In the presence of citric acid and EDTA, Cd adsorption in red soil increased with pH in acid media but decreased in high pH one. Further studies placed stress on the adsorbed Cd in red soil which was found to be existed mainly as exchangeable one at pH<5.5, and desorption rate by 0.10 mol/L NaNO3 gave a peak-shaped curve due to the difference of specifically and nonspecifically adsorbed Cd with pH's change.

作 者： ZHOU Dong-mei WANG Shen-qiang CHEN Huai-man   作者單位： Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, Chinese Academy of Sciences,  刊 名： 環(huán)境科學(xué)學(xué)報(bào)(英文版)  ISTIC SCI 英文刊名： ENVIRON MENTAL SCIENCES  年，卷(期)： 2001 13(2)  分類(lèi)號(hào)： X131.3  關(guān)鍵詞：  

【Interaction of Cd and citric acid, E】相關(guān)文章：

Conversion regular patterns of acetic acid,propionic acid and butyric acid in UASB reactor04-26

CD4E型自動(dòng)變速器的基本檢查和測(cè)試04-27

菖蒲幼苗對(duì)Cd脅迫的響應(yīng)及其Cd富集能力分析04-26

Studies on the Interaction of Beryllon Ш with Proteins by Voltammetric Technique and its Application04-27

Physicochemical interaction and its influence on deep bed filtration process04-26

Cd脅迫下黃菖蒲幼苗根系生長(zhǎng)與Cd積累的研究04-26

Cd Zn處理對(duì)烤煙生長(zhǎng)和煙株Cd含量的影響04-25

Impact of Seasalt Deposition on Acid Soils in Maritime Regions04-27

A New Diterpene Acid from the Flowers of Heteropappus altaicus04-26

Experimental study on the interaction of fine water mist with solid pool fires04-27