土壤2011，Vol.43Issue(2)：312-316,5.
发育程度对海南玄武岩发育土壤吸附铬酸根和磷酸根的影响
Effect of Soil Development on Adsorption of Chromate and Phosphate by Basalt-derived Soils with Different Ages in Hainan
摘要
Abstract
The adsorption characteristics of chromate and phosphate in basalt-derived soils with different ages in Hainan were investigated.The results indicated that free iron oxides and positive surface charge of the soils increased with the increase of soil age or soil development degree,thus the amount of chromate and phosphate adsorbed by soils changed in the same trends. Desorption rate of chromate adsorbed ranged from 19.8％ to 39.6％, which suggested that both specific and eleetrostatic adsorption were involved in chromate adsorption. However phosphate was mainly adsorbed through non-electrostatic adsorption mechanisms. The amount of phosphate desorbed from soil surfaces was very low and less than 6％. The desorption of phosphate in deionized water was greater than that in 0.1 mol/L NaNO3 and QNO3. Desorption of phosphate in 0.1 mol/L KNO3 was lower than that in 0.1 mol/L NaNO3. Electrolyte affected the dosorption of phosphate through the change of electric potential in adsorption plane on soil surfaces.关键词
磷酸根/铬酸根/吸附/解吸/发育程度/离子强度/动电电位Key words
Phosphate/ Chromate/ Adsorption/ Desorption/ Soil development degree/ Ionic strength/ Zeta potential分类
农业科技引用本文复制引用
钟凯,徐仁扣,赵安珍,姜军,李航..发育程度对海南玄武岩发育土壤吸附铬酸根和磷酸根的影响[J].土壤,2011,43(2):312-316,5.基金项目
中国科学院知识创新工程重要方向性项目(KZCX2-YW-409)资助. （KZCX2-YW-409）
