摘要
采用OECD Guideline批量平衡法,研究磺胺嘧啶在大凌河义县段沉积物中不同Ca2+离子浓度(0.01、0.03、0.05、0.08和0.1mol/L Ca Cl2溶液)和阳离子类型(0.01 mol/L的Ca Cl2、Mg Cl2、Na Cl、KCl溶液)对磺胺嘧啶在河流沉积物中吸附特性的影响。研究表明不同价态阳离子的竞争吸附能力为价态越高,竞争能力越强:M+(Na+、K+)<M2+(Ca2+、Mg2+)。不同Ca Cl2浓度下,磺胺嘧啶在河流沉积物吸附中随着阳离子浓度的增加吸附量减小。沉积物中磺胺嘧啶的最大吸附量与沉积物的阳离子交换量呈正相关。
OECD Guideline batch equilibrium method was used to study sulfadiazine adsorption on sediments collected from Yixian section of Daling River and to reveal the effect of Ca2＋ ion strength and different cations （0.01 mol/L solution of CaCl2, MgC12, NaC1, KC1） on sulfadiazine sorption process in fiver sediments. Results indicated that the competitive adsorption capacity of different valence cations is as the higher valence, the stronger competitiveness, with M＋（Na＋, K＋）〈 M2＋（Ca2＋, Mg2＋）. Under different concentrations of CaC12, the adsorption of sulfadiazine in fiver sediments decrease with increasing the concentration of cations. The maximal adsorption capacity of sulfadiazine in river sediments and cation exchange capacity of sediments are positively correlated.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第5期48-52,共5页
Environmental Science & Technology
