School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
Int J Biol Macromol. 2019 Apr 1;126:107-117. doi: 10.1016/j.ijbiomac.2018.12.119. Epub 2018 Dec 14.
In this work, a biobased adsorbent (CMC-PAMA) consisting of sodium carboxymethyl cellulose, polyacrylic acid and polyacrylamide was prepared by a simple thermal crosslinking method for the removal of methylene blue (MB) and Pb (II) from aqueous solutions. The CMC-PAMA showed excellent static adsorption capacities for MB and Pb (II) of 1611.44 mg·g 840.11 mg·g, respectively, indicating its excellent performance on dyes dynamic removal. The adsorption performance of the as-prepared CMC-PAMA could be fitted well with pseudo-second-order and Langmuir isothermal model. The adsorption mechanism between CMC-PAMA and Pb (II) was confirmed by FT-IR, XPS and ion-exchange behavior. Interestingly, CMC-PAMA showed high efficiency for separation of MB/methyl orange (MO) mixtures, low equilibrium swelling ratio (0.52 g·g) in distilled water, good stability and reusability. With those combined advantages, CMC-PAMA could find potential application in wastewater treatment.
在这项工作中，通过简单的热交联法制备了一种由羧甲基纤维素钠、聚丙烯酸和聚丙烯酰胺组成的生物基吸附剂（CMC-PAMA），用于从水溶液中去除亚甲基蓝（MB）和 Pb（II）。CMC-PAMA 对 MB 和 Pb（II）的静态吸附容量分别达到了 1611.44mg·g 和 840.11mg·g，表明其对染料的动态去除具有优异的性能。所制备的 CMC-PAMA 的吸附性能可以很好地符合拟二级和 Langmuir 等温模型。通过 FT-IR、XPS 和离子交换行为证实了 CMC-PAMA 和 Pb（II）之间的吸附机制。有趣的是，CMC-PAMA 对 MB/甲基橙（MO）混合物的分离具有高效率、在蒸馏水中的低平衡溶胀率（0.52g·g）、良好的稳定性和可重复使用性。CMC-PAMA 具有这些综合优势，可能在废水处理中具有潜在的应用。
