Recycling of Cr (VI) from weak alkaline aqueous media using a chitosan/triethanolamine/Cu (II) composite adsorbent
Recycling of Cr (VI) from weak alkaline aqueous media using a chitosan/triethanolamine/Cu (II) composite adsorbent
复制标题
使用壳聚糖/三乙醇胺/Cu(II)复合吸附剂从弱碱性水介质中回收Cr(VI)
DOI：
10.1016/j.carbpol.2018.10.004
复制
发表时间：
2019
影响因子：
11.2
通讯作者：
Han Xuanli
中科院分区：
文献类型：
--
作者：
Zhang Liang;Mu Chaoqun;Zhong Lvling;Xue Juanqin;Zhou Yuanzhen;Han Xuanli
制备了壳聚糖/三乙醇胺/Cu(Ⅱ)(CTS/TEA/Cu(Ⅱ))复合吸附剂，并应用于碱性条件下从水介质中回收Cr(Ⅵ)。为了研究吸附行为，通过批量实验评估了pH的影响，并通过FT-IR、SEM、XRD和Zeta电位对制备的吸附剂进行了表征。该吸附剂在较宽的pH范围内（尤其是7以上）表现出对Cr(Ⅵ)的高吸附能力，这表明通过调节吸附前的pH值将Cr(Ⅵ)与其他金属阳离子分离的可能方法。进行吸附动力学和热力学实验来探讨吸附机理。再生研究表明，该吸附剂可以重复使用五个吸附-解吸循环，而不会大幅损失吸附能力。总体而言，CTS/TEA/Cu(Ⅱ)吸附剂在回收废水中的Cr(Ⅵ)方面表现出很高的潜力。
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.