Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan; Nuclear Research Institute, Vietnam Atomic Energy Institute (VINATOM), 01 Nguyen Tu Luc, Dalat, Lam Dong, Viet Nam.
Department of Applied Quantum Physics and Nuclear Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Fukuoka, 819-0395, Japan.
J Hazard Mater. 2019 Mar 5;365:237-244. doi: 10.1016/j.jhazmat.2018.11.008. Epub 2018 Nov 5.
Hybrid hydrogels were prepared by blending Carboxymethyl chitosan (CMCts), Carboxymethyl cellulose (CMC) with Sodium sulfonate styrene (SSS) by 60-kGy gamma rays. The prepared hydrogels were utilized as silver-ion (Ag) sorbent under non- and competitive cases. Batch adsorption experiments were conducted in functional conditions including contact time, ratios of (CMC:CMCts) and SSS, pH value, temperature and adsorbent weight. Equilibrium contact time of 10 h. was obtained by the adsorption material. The optimal 4:2 ratio of (CMC:CMCts):SSS showed the Ag highest adsorption efficiency. The maximum percentage of Ag removal was achieved at the pH 5. The temperature effect on the adsorption ability of hybrid hydrogel indicated the Ag adsorption process was endothermic and spontaneous. The Langmuir isotherm model fitted Ag adsorption data well, assuming a monolayer adsorption with predicted maximum adsorption capacity of 451.74 × 10 mg. g. From the kinetic data, the process of Ag adsorption had higher agreement with the pseudo-2nd order model, predicting the amount of Ag uptake at different contact time intervals and at equilibrium.
通过 60kGyγ射线共混羧甲基壳聚糖（CMCts）、羧甲基纤维素（CMC）与苯乙烯磺酸钠（SSS）制备了杂化水凝胶。在非竞争和竞争情况下，将所制备的水凝胶用作银离子（Ag）吸附剂。在包括接触时间、（CMC：CMCts）与 SSS 的比例、pH 值、温度和吸附剂重量等功能条件下进行了批量吸附实验。吸附材料的吸附平衡接触时间为 10h。（CMC：CMCts）：SSS 的最佳 4:2 比例显示出最高的 Ag 吸附效率。在 pH 值为 5 时，Ag 的去除率达到最大。吸附能力的温度效应表明，Ag 吸附过程是吸热和自发的。Langmuir 等温线模型很好地拟合了 Ag 吸附数据，假设单层吸附，预测最大吸附容量为 451.74×10mg.g。从动力学数据来看，Ag 吸附过程与准二级模型更吻合，预测了不同接触时间间隔和平衡时的 Ag 吸收量。
