一种新型生物相容的负载 FeO 的壳聚糖聚电解质纳米粒子，用于去除 Cd 离子。
A novel and biocompatible FeO loaded chitosan polyelectrolyte nanoparticles for the removal of Cd ion.
机构信息
Laboratory of Aquatic Products Quality & Safety Risk Assessment (Shanghai) at China Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China; College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National R&D Branch Center for Freshwater Aquatic Products Processing Technology (Shanghai), Shanghai 201306, China.
College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; National R&D Branch Center for Freshwater Aquatic Products Processing Technology (Shanghai), Shanghai 201306, China.
出版信息
Int J Biol Macromol. 2019 Dec 1;141:1165-1174. doi: 10.1016/j.ijbiomac.2019.09.040. Epub 2019 Sep 6.
In this work, FeO loaded chitosan (CS) nanoparticles (NPs) and microparticles (MPs) were synthesized based on ionic gelation technology for the removal of Cd ion. The influencing parameters including initial concentration, pH, contact time and recycling was evaluated and optimized. The results showed that particle size of FeO loaded CS NPs and MPs was in the range of 164.05-768.69 nm, and the former showed relatively higher adsorption capacities (97.86 mg/g) on Cd ion than the latter after 90 min at pH 5.0 for the solutions with initial Cd ion of 100 mg/L, respectively. Brunauer, Emmett and Teller (BET) test illustrated 61.48 m/g of specific surface area, 0.0274 cm/g of pore volume and 6.03 nm average pore size. The results of FT-IR, TEM, EDS and XRD indicated that FeO was well incorporated into CS NPs and MPs. Moreover, the adsorption equilibrium data fitted well with Langmuir isotherm model and adsorption process followed the pseudo-second-order model. The adsorption mechanisms could be well explained though coordination and electrostatic attraction. Findings of this work highlighted the potential using FeO loaded CS NPs as an effective and recyclable adsorbent for the removal of heavy metal ions in industrial wastewater treatment.
在这项工作中，基于离子凝胶技术合成了负载 FeO 的壳聚糖（CS）纳米颗粒（NPs）和微颗粒（MPs），用于去除 Cd 离子。评估和优化了初始浓度、pH 值、接触时间和循环利用等影响参数。结果表明，负载 FeO 的 CS NPs 和 MPs 的粒径在 164.05-768.69nm 范围内，在初始 Cd 离子浓度为 100mg/L、pH 值为 5.0 的条件下，90min 后前者对 Cd 离子的吸附容量（97.86mg/g）高于后者。BET 测试表明比表面积为 61.48m/g，孔体积为 0.0274cm/g，平均孔径为 6.03nm。FT-IR、TEM、EDS 和 XRD 的结果表明，FeO 很好地掺入了 CS NPs 和 MPs。此外，吸附平衡数据很好地符合 Langmuir 等温模型，吸附过程遵循准二级模型。通过配位和静电吸引可以很好地解释吸附机制。这项工作的结果强调了负载 FeO 的 CS NPs 作为一种有效且可回收的吸附剂，用于去除工业废水中重金属离子的潜力。
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