A novel chemically modified cellulose (DTD) adsorbent bearing pendent methyl benzalaniline chelating group was synthesized. This new used for the removal of Cu2+ and Pb2+ heavy metal ions from aqueous solution. The chemical structural characteristics were determined using FT-IR, 13C CP-MAS NMR, SEM, EDX TGA analysis. adsorption parameters, such as pH, dose, contact time, initial ion concentration temperature optimized. Adsorption kinetic parameters fitted into pseudo-first-order...

Abstract A low cost adsorbent prepared from material of biological origin Setaria verticillata (Grasses) has been utilized as an for the removal Reactive Yellow 15 (RY15) dye aqueous solution. The combined effect initial pH, dose, and concentration was investigated using Response Surface Methodology (RSM). most influential adsorption factor on each experimental design response identified Analysis Of Variance (ANOVA). values percentage were found to be in good agreement with predicted values....

The adsorption studies of poly(6-(ethoxybenzothiazole acrylamide) (PEBTA), for Cu(II) and Zn(II) metal ions removal from an aqueous solution have been investigated, as a function pH, adsorbent dose, contact time, initial ion concentration temperature. chemical structural characteristics the were determined by FT-IR, 1H-NMR, TGA, SEM, EDAX analysis. maximum capacities ions, calculated Langmuir isotherm model, 273.5 216.4 mg/g, respectively. kinetic show that onto PEBTA follows pseudo second...

Removal of Cr(VI) ions from aqueous solution was investigated using activated carbon obtained acid modified (AMCAC) and unmodified corncorb (UMCAC) by batch adsorption technique at 30°C. H 2 SO 4 10 N , 20 30 concentrations were used for the modification carbon. The effect different parameters, such as pH, initial ion concentration, contact time, adsorbent dosage studied. effective maximum removal pH 6.0, equilibrium attained in 60 min. Kinetic studies show that pseudo‐second‐order kinetic...

ABSTRACT: A novel approach toward chemically modified cellulose bearing active chelating Schiff base with hydroxyl group (Cell‐Hy) was synthesized. The examined for its heavy metal ion uptake potential from aqueous solution. chemical and structural features of the adsorbent were characterized by Fourier transform infrared spectroscopy (FT‐IR), solid state 13 C‐NMR, Scanning Electron Microscopy (SEM), energy dispersive analysis X‐ray (EDAX) observations. experimental conditions adsorption...

Chemically modified cellulose bearing metal binding sites like Schiff base and carboxylic acid groups was synthesized characterized through Fourier transform infrared solid state 13C–nuclear magnetic resonance (NMR) analysis. The chemically (Cell-PA) adsorbent examined for its ion uptake ability Cu(II) Pb(II) ions from aqueous solution. Kinetic isotherm studies were carried out under optimum conditions. Pseudo-second-order kinetics Langmuir fit well with the experimental data. Thermodynamic...

Abstract Aromatic polyamides and polythioamides with pendent chlorobenzylidine rings were synthesized through direct polycondenzation of 2‐( p ‐chlorobenzalimino) terephthalic acid the diamines 4,4′‐oxidianiline (1a), 4,4′‐methylenediamide (1b), 4,4′‐diaminodiphenyl sulfone (1c), thioamines 4,4′‐(bisthiourea) diphenyl ether (3a), methane (3b), (3c), respectively, in DMF using P(OPh) 3 /pyridine. The polymers precipitated water as nonsolvent. FTIR 1 H‐NMR spectroscopic analysis was used to...

Novel azomethine‐based polyester is synthesized and the structure of products confirmed by 1 H NMR, FT‐IR, XRD. The as polymer employed inhibitor against corrosion rebar in artificially simulated concrete pore solution with chloride contamination (blank) means Tafel polarization electrochemical impedance measurements. First time literature, azomethine for corrosion. Polarization studies exhibited maximum inhibition efficiency 98% at 1000 ppm concentration. Electrochemical revealed mixed‐type...

Novel polyamides bearing pyridyl and azomethine groups as pendant pyridylformylimino along with thioamide moieties in the polymer backbone were synthesized using 4-pyridylformylimino-N-(phenyl,2′,5′-dicarboxylic acid) 4,4′-(bisthiourea)benzidine 4,4′- diaminodiphenyl methane through one pot phosphorylation polymerization technique. The optimization of experimental conditions parameters including pH, adsorbent dosage, contact time, initial metal ion concentration for removal heavy has also...

Batch adsorption studies were carried out for the removal of cadmium ion (Cd2+ ion) and methyl red (MR) from aqueous solutions using poly(azomethinethioamide) (PATA) resin which is having pendent chlorobenzylidine ring. PATA was characterized by FT-IR spectroscopy, NMR transmission electron microscope (TEM), scanning (SEM) techniques. Parameters like pH, initial dye metal concentration, adsorbent dose, contact time have been studied. Maximum observed at pH 6 Cd2+ 7 MR. Langmuir, Freundlich,...

Heavy metal pollution is a serious environmental issue worldwide with rapid increase in global industrial activities (Podder and Majumder [2016]: Water Conserv Sci Eng 1, 103–125). In this study, aromatic polyamide (PA) containing the azomethine group (Vidhyadevi et al. [2012]: Sep Technol 48, 1450–1458) was used as an adsorbent for individual simultaneous adsorption of Ni (II), Cd Zn (II) ions from their aqueous solutions. Equilibrium, kinetic, thermodynamic analyses were also carried out....

AbstractThe adsorption of Ni(II) ion from an aqueous solution was successfully carried out using activated carbon prepared Theobroma cacao (cocoa) shell, agricultural solid waste biomass. The at ambient temperature (TCAC1) and the one 350 °C (TCAC2) were characterised by FT-IR, BET, SEM, EDAX Particle size analysis methods. effects pH, dosage, initial metal concentration agitation time studied. maximum observed pH 6 equilibrium attained within 60 min. Adsorption isotherm data have been...

The removal of Congo Red (CR) from an aqueous solution, using aromatic polythioamide resin (PTA) was studied. effective pH and equilibrium time for the maximum adsorption CR on PTA is found to be 7 45 min, respectively. Among three kinetic models studied, pseudo-second order model describes efficiently. capacity calculated Langmuir isotherm 452.1 mg/g. surface morphology dye adsorbed were determined scanning electron microscopy. efficiency retained even after four cycles.

Abstract Simple phenylthiourea compounds are known for their high solubility in alkaline medium and good corrosion control. The monomer N ‐(4‐hydroxy‐3‐methoxybenzal)‐ ′‐(4′‐hydroxyphenyl) thiourea was condensed with pimeloylchloride azeloylchloride through inter‐facial polycondensation method to synthesize the polymers. polymers were dissolved 2 sodium hydroxide controlling efficiency on aluminium studied AC impedance potentiodynamic polarization methods.

Abstract This paper reports the application of poly(azomethinethioamide) (PATA) resin having pendent chlorobenzylidine ring for removal heavy metal ions such as Zn(II) and Ni(II) from aqueous solutions by adsorption technology. Kinetic, equilibrium thermodynamic models were applied considering effect contact time, initial ion concentration temperature data, respectively. The influencing parameters maximum optimized. Adsorption kinetic results followed pseudo-second order model based on...

The present study deals with the synthesis of two structurally different azomethine polyamides and their effect as inhibitor for a steel rebar in chloride containing pore solution. amorphous crystalline natures polymers were evaluated based on XRD analysis. Potentiodynamic polarisation impedance spectroscopy employed to investigate inhibition efficiency protection during corrosion. Scanning electron microscopic atomic force techniques used surface characterization presence adsorbed layer...

A novel poly [2,5-(1,3,4-thiadiazole)-benzalimine] abbreviated as TDPI adsorbent was synthesized using simple polycondensation technique. The synthetic route involves the preparation of 2,5-diamino-1,3,4-thiadiazole from 2,5-dithiourea and subsequent condensation with terephthalaldehyde. resin chemically characterized Fourier transform infrared (FT-IR), 1H-NMR, 13C-NMR spectroscopic analysis. Surface morphology thermal stability were analyzed scanning electron microscopy (SEM)...

Three new diglycidyl monomers bearing phenylthiourea and azomethine groups were synthesized using 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenylmethane, sulphone as starting materials. The characterized through IR 1H-NMR spectroscopic analysis. blended with epoxy based trickle impregnation resin (Dobeckot 605) cured. cured resins subjected to TGA DSC Presence of 3% by weight the thiourea in blends did not alter thermal stability but increased conductivity. conductivity approximately 1.9...