文献类型：期刊文献

英文题名：Removal of methylene blue from aqueous solution using common bean vine and cowpea vine biomass

作者：Qin, Guotong[1];Wang, Conghui[2];Yang, Qiongjie[2];Wei, Wei[2]

第一作者：Qin, Guotong

通讯作者：Wei, W[1]

机构：[1]Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China;[2]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China

第一机构：Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, 18 Sanqu, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2023

卷号：283

起止页码：237-246

外文期刊名：DESALINATION AND WATER TREATMENT

收录：;Scopus(收录号：2-s2.0-85153485366);WOS:【SCI-EXPANDED(收录号:WOS:000946304000020)】；

基金：Acknowledgments This work was supported by the Natural Science Foundation of China (No. 51772031) .

语种：英文

外文关键词：Biosorption; Vine biomass; Methylene blue; Exothermic; Pseudo-second-order; Langmuir model

摘要：Agricultural waste materials from common bean (Phaseolus vulgaris L.) and cowpea (Vigna unguicu-lata subsp. unguiculata) vines were investigated as adsorbents to remove methylene blue (MB) from aqueous solution. Both vines exhibited efficient adsorption of MB. Characterization of the adsorbents was performed by infrared spectroscopy, scanning electron microscopy and N2 adsorption at 77 K. Composition was determined by the van Soest method. The adsorption isotherms of the vine adsor-bents for MB fitted a Langmuir model well and the kinetics followed a pseudo-second-order model. The adsorption capacities of common bean and cowpea vines for MB were 181.82 and 144.93 mg/g, respectively, and the adsorption was a spontaneous and exothermic process. The high adsorption performance was mainly due to the hierarchical pore structure and abundant surface functional groups of the vine materials. The adsorption mechanism involved pore filling, electrostatic attraction, hydrogen bonding, pi-pi interactions, ion-exchange and n-pi interactions. The results revealed that common bean and cowpea vines can be used as effective low-cost adsorbents in the treatment of contaminated wastewater.