title: Simple preparation of aminothiourea-modified chitosan as corrosion inhibitor and heavy metal ion adsorbent.
abstract: By a simple and convenient method of using formaldehyde as linkages, two new chitosan (CS) derivatives modified respectively with thiosemicarbazide (TSFCS) and thiocarbohydrazide (TCFCS) were synthesized. The new compounds were characterized and studied by Fourier transform infrared spectroscopy, elemental analysis, thermal gravity analysis and differential scanning calorimetry, and their surface morphologies were determined via scanning electron microscopy. These CS derivatives could form pH dependent gels. The behavior of 304 steel in 2% acetic acid containing different inhibitors or different concentrations of inhibitor had been studied by potentiodynamic polarization test. The preliminary results show that the new compound TCFCS can act as a mixed-type metal anticorrosion inhibitor in some extent; its inhibition efficiency is 92% when the concentration was 60 mg/L. The adsorption studies on a metal ion mixture aqueous solution show that two samples TSFCS and TCFCS can absorb As (V), Ni (II), Cu (II), Cd (II) and Pb (II) efficiently at pH 9 and 4.
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Manlin
authors.initials: M
authors.lastname: Li
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Xu
authors.affiliation: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Ronghua
authors.initials: R
authors.lastname: Li
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Dongen
authors.initials: D
authors.lastname: Wang
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Tianbao
authors.initials: T
authors.lastname: Li
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
authors.forename: Maosen
authors.initials: M
authors.lastname: Yuan
authors.affiliation: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: jywang@nwsuaf.edu.cn.
authors.forename: Jinyi
authors.initials: J
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000588:Amines; D048271:Chitosan / Q000737:chemistry*; D003343:Corrosion; D055664:Electrochemical Techniques; D006834:Hydrazines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012663:Semicarbazides / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013890:Thiourea / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D000588:Amines; D006834:Hydrazines; D019216:Metals, Heavy; D012663:Semicarbazides; C011368:thiocarbohydrazide; C005151:thiosemicarbazide; D048271:Chitosan; D013890:Thiourea
keywords: Adsorbent; Aminothiourea; Chitosan; Inhibitor; Modification