College of Science, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
College of Science, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, 710055, China.
Carbohydr Polym. 2019 Feb 1;205:151-158. doi: 10.1016/j.carbpol.2018.10.004. Epub 2018 Oct 4.
A Chitosan/triethanolamine/Cu (Ⅱ) (CTS/TEA/Cu (Ⅱ)) composite adsorbent was prepared and applied to recycle Cr (Ⅵ) from aqueous media in alkaline conditions. To investigate the adsorption behavior, the influence of pH was evaluated via batch experiments, and the prepared adsorbent was characterized by FT-IR, SEM, XRD, and Zeta potential. This adsorbent exhibited high adsorption capacity for Cr (Ⅵ) in a wide pH range (especially above 7), suggesting a possible way to separate Cr (Ⅵ) from other metal cations by adjusting the pH value prior to adsorption. Adsorption kinetic and thermodynamic experiments were conducted to explore the adsorption mechanism. Regeneration studies showed that the adsorbent can be reused for five adsorption-desorption cycles without substantial loss of adsorption capacity. Overall, the CTS/TEA/Cu (Ⅱ) adsorbent exhibits high potential for recyclingCr (Ⅵ) from wastewater.
一种壳聚糖/三乙醇胺/铜（Ⅱ）（CTS/TEA/Cu（Ⅱ））复合材料吸附剂被制备出来，并应用于在碱性条件下从水介质中回收六价铬（Cr（Ⅵ））。为了研究吸附行为，通过批量实验评估了 pH 的影响，并用傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、X 射线衍射（XRD）和 Zeta 电位对制备的吸附剂进行了表征。该吸附剂在很宽的 pH 范围内（特别是在 7 以上）对 Cr（Ⅵ）表现出高吸附容量，这表明通过在吸附前调节 pH 值，有可能将 Cr（Ⅵ）与其他金属阳离子分离。进行了吸附动力学和热力学实验以探索吸附机制。再生研究表明，该吸附剂可在五个吸附-解吸循环中重复使用，而不会显著损失吸附容量。总的来说，CTS/TEA/Cu（Ⅱ）吸附剂具有从废水中回收 Cr（Ⅵ）的巨大潜力。
