摘要
在模拟的酸性土壤条件下,利用制备的低聚合羟基铁 蒙脱石复合体对铬酸根进行吸附实验。重点研究了吸附条件对复合体铬吸附能力的影响,对比了蒙脱石和含水氧化铁。结果表明,实验条件下复合体有较强的铬吸附能力,其铬吸附量低于铁沉积物而明显高于蒙脱石。铬初始质量浓度是影响复合体铬吸附量的最主要因素,离子强度次之。吸附时间(12h以上)、温度、pH值对复合体铬吸附量的影响很小;说明在酸性土壤条件下,复合体有强且稳定的铬吸附能力。
Adsorption experiment of chromate has been conducted on the surface of hydroxy-Fe-montmorillonite complex under simulated acidic soil conditions. The effects of the initial concentration of chromate, ionic strength, pH, temperature and adsorption duration on the adsorption of Cr on hydroxy-Fe-montmorillonite complex have been investigated in detail. Results show that hydroxy-Fe-montmorillonite complex has strong affinity for Cr under experimental conditions.The uptake of Cr on hydroxy-Fe-montmorillonite complex is influenced by, in a decreasing order of,the initial concentration of Cr>ionic strength>temperature>adsorption duration>pH.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2004年第2期118-123,共6页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家自然科学基金资助项目(49973028)
