College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China.
Ecotoxicol Environ Saf. 2018 May 15;152:16-23. doi: 10.1016/j.ecoenv.2018.01.025. Epub 2018 Feb 4.
MS-ZnS and MS-ZnS:Mn complexes were synthesized via a simple method. The results showed that sulfide was successfully loaded on the maize straw. The results of fitting the experimental data showed that the sorption conforms to the pseudo-second-order kinetics, and the TYL sorption on MS fit the Henry model well, but the Freundlich model was more suited to MS-ZnS and MS-ZnS:Mn. In addition, the k values of MS-ZnS (206.0(mg/kg)/(mg/L)) and MS-ZnS:Mn (382.5(mg/kg)/(mg/L)) were significantly greater than that of MS (72.2(mg/kg)/(mg/L)), indicating that ZnS and ZnS:Mn could improve the sorption capacity of TYL on MS. The pH, ionic strength and temperature influence the sorption process, and the sorption ability of TYL on MS-ZnS and MS-ZnS:Mn showed little change when the solution pH was > 5; the amount of TYL sorption on the adsorbents gradually decreased with the increasing concentration of KNO. Electrostatic interactions, H bonding and hydrophobic interactions are involved in the sorption of TYL on MS, MS-ZnS and MS-ZnS:Mn, and compared with MS, the main mechanism is surface complexation. This research can provide technical support for the utilization of biomass and the restoration of water polluted by antibiotics.
MS-ZnS 和 MS-ZnS:Mn 配合物通过简单的方法合成。结果表明，硫成功地负载在玉米秸秆上。实验数据拟合结果表明，吸附符合准二级动力学，TL 在 MS 上的吸附很好地符合亨利模型，但更适合 MS-ZnS 和 MS-ZnS:Mn 的是 Freundlich 模型。此外，MS-ZnS(206.0(mg/kg)/(mg/L))和 MS-ZnS:Mn(382.5(mg/kg)/(mg/L))的 k 值明显大于 MS(72.2(mg/kg)/(mg/L))，表明 ZnS 和 ZnS:Mn 可以提高 TYL 在 MS 上的吸附能力。pH 值、离子强度和温度影响吸附过程，当溶液 pH 值>5 时，TL 在 MS-ZnS 和 MS-ZnS:Mn 上的吸附能力变化不大；随着 KNO3 浓度的增加，吸附剂上 TYL 的吸附量逐渐减少。静电相互作用、氢键和疏水相互作用参与了 TYL 在 MS、MS-ZnS 和 MS-ZnS:Mn 上的吸附，与 MS 相比，主要机制是表面络合。这项研究可为生物质的利用和受抗生素污染水体的修复提供技术支持。
