Sorption thermodynamics and kinetics properties of tylosin and sulfamethazine on goethite
Sorption thermodynamics and kinetics properties of tylosin and sulfamethazine on goethite
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泰乐菌素和磺胺二甲嗪在针铁矿上的吸附热力学和动力学特性
DOI：
10.1016/j.cej.2013.02.115
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发表时间：
2013-05
影响因子：
15.1
通讯作者：
Qingyu Meng
中科院分区：
文献类型：
--
作者：
Zhi Dang;Qian Zhang;Yanjie Li;Qingyu Meng
为了解泰乐菌素（TYL）和磺胺二甲嘧啶（SMT）在土壤上的吸附过程，通过吸附平衡和吸附速率实验，研究了两种药物在针铁矿上的吸附热力学和动力学性质。结果表明，TYL和SMT的吸附呈非线性，吸附量受溶液pH值的影响。TYL和SMT的吸附速率随着初始浓度的增加而降低。吸附过程可能由初始的边界层扩散或外表面扩散，然后是颗粒内扩散或孔内扩散阶段，最后是与吸附剂内表面吸附相关的平衡阶段构成。热力学计算结果表明，TYL在针铁矿上的吸附是自发的、自发的，而SMT在针铁矿上的吸附是自发的、吸热的。结果表明，在富含氧化铁的土壤中，TYL和SMT的迁移能力较弱。这两种化学品在针铁矿上的吸附行为的显著差异可能与它们的理化性质有关，表明TYL和SMT在针铁矿上的吸附机理是复杂的，并且在不同pH条件下，每种化学品的域吸附机理是可变的。应注意TYL和SMT的环境风险评估。
In order to understand the sorption processes of tylosin (TYL) and sulfamethazine (SMT) on soils, the sorption thermodynamics and kinetics properties of two chemicals on goethite were investigated through sorption equilibrium and sorption rate experiments. The results showed that the sorption of TYL and SMT were nonlinear and the sorption capacities were influenced by the pH conditions of solution. The sorption rates for TYL and SMT decreased as the initial concentration increased. The sorption process might be constituted with the initial boundary layer diffusion or external surface, then the intraparticle diffusion or pore diffusion stage and finally equilibrium stage related with the sorption on the interior surface of sorbent. Thermodynamic calculations of sorption of TYL and SMT on goethite revealed that the sorption of TYL on goethite was exothermal and spontaneous and SMT was endothermic and spontaneous. The results indicated that the transportation abilities of TYL and SMT might be weak for the soils rich in iron oxide. The significant differences in the sorption behavior of two chemicals might be related with their physicochemical properties and suggested that the sorption mechanisms of TYL and SMT on goethite would be complicated and the domain sorption mechanism for each chemical at different pH conditions would be variable. It should be noted to assess the environmental risks of TYL and SMT.
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DOI：
10.1023/a:1012065300116
发表时间：
2001-01-01
影响因子：
2.6
作者：
Cundliffe, E;Bate, N;Merson-Davies, L
通讯作者：
Merson-Davies, L
影响因子：
11.4
作者：
Aksu, Zuemriye;Karabayur, Goeknur
通讯作者：
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影响因子：
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作者：
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通讯作者：
Leinweber, P
影响因子：
8.8
作者：
E. Vaclavik;B. Halling‐Sørensen;F. Ingerslev
通讯作者：
E. Vaclavik;B. Halling‐Sørensen;F. Ingerslev
影响因子：
9.9
作者：
Yanping Zhao;Jinju Geng;Xiaorong Wang;X. Gu;Shixiang Gao
通讯作者：
Yanping Zhao;Jinju Geng;Xiaorong Wang;X. Gu;Shixiang Gao