Synthesis and characterization of zeolite-g-polyacrylamide (Zeolite-g-PAAM) by using simultaneous irradiation technique

Abstract

In this study, we synthesized the adsorbent based zeolite as an adsorbent for toxic metal removal. The modified zeolite adsorbent has been successfully synthesized using polymerization radiation technique by gamma rays. The monomer of acrylamide was applied to be grafted onto zeolite. The irradiation doses used in this study were 10–75 kGy and we obtained the optimum dose for synthesizing the zeolite-g-polyacrylamide by using the simultaneous irradiation technique was 25 kGy, with 99.88% and 48.01% for the gel fraction and degree of grafting, respectively. The zeolite-g-polyacrylamide were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Differential Thermal Analysis (DTA) and Scanning Electron Microscope (SEM).

Employment and performance of modified chitosan for the removal of copper ions and methylene blue in wastewater

“…[ 48 ] While as‐synthesized chitosan S3 shows the liberation of ammonia molecules (about 28% of mass) in the second step of degradation at around 237°C–338°C related to the decomposition of amide groups from the network structure of the grafted polyacrylamide on chitosan followed by the loss in the mass by 38% due to decomposition of the polyacrylamide grafted on chitosan in the range 358°C–488°C. [ 49 ]…”

“…[43,45] The TG and DTG carves (Figure 4A,B) show that as-prepared chitosan S1 illustrates about a 33% loss in its mass at around 172 C-317 C owing to the decarboxylation process, and then the decomposition (about 42% of mass) of the polyacrylic acid grafted on chitosan in the range 329 C-450 C. [47] While the grafted chitosan S2 displays a mass loss of about 13% and 30% at temperatures around 195 C-296 C and 287 C-396 C owing to the degradation of hydroxyl and sulfonic acid groups of Cs and AMPS, respectively. After that, it lost about 18% of mass related to the decomposition of the poly 2-acrylamide-2-methylpropane sulfonic acid grafted on chitosan in the range 287 C-396 C. [48] While assynthesized chitosan S3 shows the liberation of ammonia molecules (about 28% of mass) in the second step of degradation at around 237 C-338 C related to the decomposition of amide groups from the network structure of the grafted polyacrylamide on chitosan followed by the loss in the mass by 38% due to decomposition of the polyacrylamide grafted on chitosan in the range 358 C-488 C. [49] F I G U R E 3 The XRD diffraction pattern for the synthesized polymeric compounds.…”

Removal of Some Heavy Metals from Polluted Water Using New Schiff Base for Polyacrylamide with Zeolite Nanocomposites

“…Ammonia was released upon heating the PAAM to 244.37 °C, corresponding to the thermal degradation of the organic matter, where the second stage was noticed at 112-400°C with a weight loss of 39%, which may be attributed to the thermal decomposition of the amide and carboxylate side groups of the polyacrylamide 40 . In the third phase, polymer breakdown caused a loss of 46% at 400-900 °C 41 .…”