土壤学报2012，Vol.49Issue(5)：892-900,9.
不同浓度铜离子土壤的吸附-解吸行为——兼论弱专性吸附态的存在
BEHAVIORS OF COPPER IONS DIFFERENT IN CONCENTRATION IN SORPTION-DESORPTION BY SOILS—AND EXISTENCE OF WEAK-SPECIFIC-ADSORPTION STATE
摘要
Abstract
Behaviors of Cu 2+ in adsorption-desorption in three variable charge soils and two constant charge soils as affected by its concentration were studied. It was found that the curves of pH and Cu2+ adsorption rate always intersected in the section of low pH, and the curves tendedd to lean towards the right when Cu 2+rose in concentration, and confirmed that in variable charge soils, adsorbed copper ions could be desorbed with deionized water and desorption peaks observed. The study on change in pH of the adsorption system as affected by desorption revealed that when the system adsorbing Cu * was lower than 5. 0 in pH, its pH would rise after desorption of the ions, but when the system was higher than 5. 0 in pH, ts pH would decline, which suggest that pH5. 0 is probably another turning point where the mechanism of the soil adsorbing Cu 2+ changes. Existence of weak adsorption state in specific adsorption and causes of its formation were also discussed.关键词
铜离子/解吸/弱专性吸附态Key words
Copper ion/ Desorption/ Weak-specific-adsorption state分类
农业科技引用本文复制引用
邹献中,张超兰,宁建凤,魏岚,杨少海..不同浓度铜离子土壤的吸附-解吸行为——兼论弱专性吸附态的存在[J].土壤学报,2012,49(5):892-900,9.基金项目
国家科学自然基金项目(批准号:49831005,49971045)、广东省重点科技攻关计划项目(2005 A3040200)、广东省科技计划项目(2009B030802038)、广州市农业科技项目(GZC1002FG08015)、广东省农业科学院博士启动项目资助 （批准号:49831005,49971045）
