文献类型：期刊文献

英文题名：Chitosan/Ag-hydroxyapatite nanocomposite beads as a potential adsorbent for the efficient removal of toxic aquatic pollutants

作者：Li, Long[1];Iqbal, Jibran[2];Zhu, Ying[1];Zhang, Peng[1];Chen, Wanchao[1];Bhatnagar, Amit[3];Du, Yiping[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Zayed Univ, Coll Nat & Hlth Sci, POB 144534, Abu Dhabi, U Arab Emirates;[3]Univ Eastern Finland, Dept Environm & Biol Sci, POB 1627, FI-70211 Kuopio, Finland

年份：2018

卷号：120

起止页码：1752

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242616392065);WOS:【SCI-EXPANDED(收录号:WOS:000449892800047)】；

基金：The research was supported by the research incentive fund grant (R17037) from Zayed University, Abu Dhabi, United Arab Emirates.

语种：英文

外文关键词：Chitosan/Ag-hydroxyapatite (CS/Ag-HA) beads; Copper; Rhodamine B; Adsorption; Water treatment

摘要：In the present study, the potential of synthesized chitosan/Ag-substituted hydroxyapatite nanocomposite beads to remove basic dye, heavy metal and microbes from aqueous solutions was investigated. Beads were prepared in different ratios via embedding of Ag-hydroxyapatite (Ag-HA) into chitosan (CS) solution. The beads were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) in order to get an insight of the functional groups and morphology. Batch adsorption studies were conducted with copper ions (Cu (II)) and rhodamine B (RhB) dye by changing several parameters such as Ag-HA to Cs ratio, contact time, solution pH and initial concentration of pollutants. The antibacterial efficiency of beads was tested under dynamic contact conditions against commonly found bacteria in water, Escherichia coli. The adsorption isotherm data were best fitted with Langmuir model. The maximum Langmuir adsorption capabilities for Cu (II) ions and rhodamine B were found to be 40.11 mg/g and 127.61 mg/g, respectively. The adsorption process could be best described by pseudo-second-order kinetic model for both rhodamine B and Cu(II). The percentage removal efficiency of Cu (II) and rhodamine B from tap water and untreated river water ranged from 86.7 to 94.4% along with 99.99% of decontamination of microbial load. (C) 2018 Elsevier B.V. All rights reserved.