A new hydrogel composite, sodium alginate graft poly (acrylic acid-co-2-acrylamido-2-methyl-1-propane sulfonic acid)/attapulgite, was prepared and characterized. Adsorption of heavy metal ions onto the composite studied. Maximum adsorption capacities for Pb2+, Cd2+, Cu2+ Zn2+ were 1016.77, 79.38, 406.71 294.86 mg/g, respectively. It revealed that chelation played a prominent part in while ion-exchange dominant other three ions. The Cd2+ consistent with Langmuir model, accordance both...

Abstract Chitosan graft poly(acrylic acid‐co‐2‐acrylamide‐2‐methyl propane sulfonic acid) ( CTS ‐g‐P( AA ‐co‐ AMPS )) hydrogel is prepared and used to remove methylene blue MB ) rhodamine B RB mixed dyes from aqueous solutions. The effect of adsorption conditions, including the initial concentrations dye solutions, contact time, pH values, ionic strength, adsorbent dosage, on capacities investigated. maximal capacity for 936.0 556.9 mg/g, respectively. isotherms are discussed using extended...

Poly(acrylic acid- co-2-acrylamide-2-methyl-1-propanesulfonic acid)/kaolin hydrogel composite was synthesised using acrylic acid (AA), 2-acrylamide-2-methyl-1-propanesulfonic (AMPS) and kaolin (KL) as main materials. The characterised used to remove methyl orange (MO) from aqueous solutions. Effect of adsorption conditions, including initial concentration MO, contact time, pH values ionic strength, on the capacities studied. Maximal capacity 506 mg/g MO 1000 mg/L. It showed that process...

A novel superabsorbent composite was prepared by intercalation polymerization of acrylic acid (AA) and 2acrylamido-2-methyl-1-propane sulfonic (AMPS) in the presence montmorillonite (MMT), using ammonium persulfate (APS) as an initiator N,N'-methylenebisacrylamide (MBA) a cross linker. The characterized Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD) thermogravimetric analysis (TGA). Maximum absorbency distilled water 0.9% sodium...

Adsorption of four dyes, namely methyl violet (MV), rhodamine 6G (R6G), acid chrome blue K (AK) and xylenol orange (XO) onto sodium alginate graft poly(acrylic acid-co-2-acrylamide-2-methyl-1-propanesulfonicacid)/kaolin (SA-g-P(AA-co-AMPS)/KL) hydrogel composite is studied. The factors influencing the adsorption capacities, including initial concentrations dye solutions, contact time, pH values dosage adsorbent as well ionic strength solution are discussed. It more effective for to adsorb...

A novel composite Chitosan graft poly (acrylic acid-co-N-isopropylacrylamide)/graphite oxide (CTS-g-P(AA-co-NIPAM/GO) is synthesized and used to remove methylene blue (MB) fuchsin basic (FB) from aqueous solutions by adsorption. Small amount of GO brings about great improvement the thermostability together with adsorption amount. Adsorption capacities MB FB increase 842.1 633.7 mg/g, respectively, 1496.3 1000.8 0.02 g intercalation GO. The interactions between main body CTS-g-P(AA-co-NIPAM)...

Poly(acrylic acid-co-acrylamide)/kaolin hydrogel composite was synthesized and characterized. Sorption behavior of methyl violet (MV) onto the studied. Effect adsorption conditions, including contact time, initial concentration MV, pH values, adsorbent dosage ionic strength, on capacity removal percentage investigated in detail. The equilibrium reached 908.0 mg/g as MV 1000 mg/L. Adsorption mechanisms were also speculated. Further studies showed that process spontaneous satisfied...

A new composite, kaolin/sodium alginate-grafted poly(acrylic acid- co-2-acrylamido-2-methyl-1-propane sulfonic acid) (KL/SA- g-P(AA- co-AMPS)), was synthesized by intercalation graft polymerization of KL, SA, partially neutralized AA, and AMPS, using ammonium persulfate as an initiator N, N′-methylenebisacrylamide a cross-linker. The composite characterized Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis. Possible mechanisms for the process...

Sodium alginate graft poly(acrylic acid-co-acrylamide)/kaolin composite hydrogel was synthesized using ammonium persulfate (APS) as an initiator and N,N'-methylenebisacrylamide (MBA) a crosslinker. The characterized by infrared spectroscopy, x-ray diffraction, scanning electron microscopy thermogravimetric analysis. It used to remove rhodamine B from aqueous solutions. Effects of the adsorbing conditions, including initial concentration dyestuff, contact time, dosage hydrogel, pH value well...

Abstract Sodium alginate graft poly (acrylic acid‐co‐2‐acrylamide‐2‐methyl propane sulfonic acid)/graphene oxide (SA‐g‐P(AA‐co‐AMPS)/GO) hydrogel composite is prepared. The characterized by infrared (IR) spectroscopy, X‐ray diffraction (XRD), high‐resolution scanning electron microscope (HRSEM), and differential calorimetry (DSC). swelling properties of the are investigated. GO acts as part cross‐linking points, which improves property composite. Maximal amount absorption capacity in water...

A new superabsorbent composite based on the natural material sodium alginate (SA) was synthesized by intercalation graft polymerization of SA, acrylic acid (AA), 2-acrylamido-2-methyl-1-propane sulfonic (AMPS) and organo-montmorillonite (OMMT) using ammonium persulfate (APS) as an initiator N,N'-methylenebisacrylamide (MBA) a cross linker. The characterized Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) thermogravimetric analysis (TGA), used to remove...

Abstract A new method for simultaneously determining five polycyclic aromatic hydrocarbons (PAHs) (fluorene, benzofluorene, pyrene, benzo( a )pyrene, and perylene) in dairy products using constant‐wavelength synchronous fluorescence spectrometry (CWSFS) was established this study. Acetonitrile chosen as the extraction solvent to extract PAHs from products, an ultrasound adopted. The supernatants were filtered 0.45‐μm microporous filter membrane concentrated dryness with nitrogen dryer....

Organo-montmorillonite /poly (acrylic acid) superabsorbent composite was prepared by intercalation polymerization of acrylic acid (AA) and organo-montmorillonite (OMMT). The characterized means Fourier-transform spectroscopy (FTIR), scanning electron microscopy (SEM) thermogravimetric analysis (TGA). Maximum absorbency OMMT/PAA in distilled water 0.9% NaCl 1439 97 g/g, respectively. Water retention the also tested. used for removal heavy metal ions from aqueous solutions. maximum adsorption...

Based on the advantages of good selectivity and high sensitivity synchronous fluorescence method, an efficient method using constant-wavelength spectrometry (CWSFS) for simultaneous rapid determination four polycyclic aromatic hydrocarbons (PAHs) (acenaphthene, phenanthrene, benzo[a]anthracene fluoranthene) in drinking water was established this study. When difference wavelength (Δλ) at 100 nm chosen CWSFS scanning, spectra PAHs could be well separated with only one single scan. Different...

A simple and sensitive kinetic fluorimetric method is reported for the determination of trace amount formaldehyde. The proposed based on catalytic effect formaldehyde oxidation reaction rhodamine B with potassium chlorate in sulfuric acid solution. Formaldehyde range 0.020-0.340 µg/mL can be determined a limit detection 5.73 ng/mL. has been used to determine fabric indoor air. results thus obtained show good agreement those by acetyl acetone method.

Abstract In this article, hexamethylol melamine (HMM) modified phenolic resin (PF) coating material was prepared by using thermoplastic PF wastewater. Using alcohol soluble PF, the wastewater (containing oxalic acid catalyst), methanol and HMM as raw materials, methyl etherified then synthesized. By determination of carbon residue, thermogravimetric analysis (TGA) differential scanning calorimetry, influences on heat resistance composition wastewater, formaldehyde (MF) resin, MF were...