Effective adsorption of Cr (VI) ions onto titanium dioxide immobilized high strength polyacrylamide hydrogels
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 9
Abstract
The “2-in-1” type polyacrylamide (PAAm) composite hydrogel adsorbers were prepared by in-situ polymerization reaction of acrylamide (AAm) monomer in presence of nano-sized TiO2 particles together with a chemical crosslinker. The TiO2 anatase nano-particles were synthesized by an acid-catalyzed sol-gel method from an alkoxide precusor. The morphological characterization of the hydrogels was done with SEM analyses. Their Cr(VI) ion adsorption capacities and wet strength properties were investigated via UV-Vis spectrophotometer and uniaxial compression tests, respectively. All the composite hydrogels showed higher swelling and adsorption performances than pure PAAm hydrogel. The neat hydrogel was found to adsorp 2.26 mg Cr(VI) per g hydrogel. On the other hand, the composite hydrogel having 0.1 wt% TiO2 was found to have the highest Cr(VI) adsorption which is 8.13 mg Cr(VI) per g hydrogel and about 260 % higher than that of neat PAAm hydrogel. This result is quite remarkable since the pure TiO2 synthesized adsorbed only 1.78 mg Cr(VI) per g nano-particle. The compression modulus, strength and toughness of the hydrogel in its wet form were found to be increased by about 80 %, 200 % and 120 %, respectively even at 0.1 wt% loading of the TiO2, compared to neat hydrogel
Authors and Affiliations
Emre Tekay, Demet Aydınoğlu, Ayşe N. Ökte, Sinan Şen
Keywords
Related Articles
- EP ID EP403387
- DOI -
- Views 71
- Downloads 0
Structural & Thermal properties of PANI/ Fe2O3
Synthesis of Polyaniline/iron oxide composites (PANI/Fe2O3) have been implemented by oxidative polymerization of Polyaniline using various amounts (10, 20, 30, 40, 50 wt %) of the Fe2O3 particles using oxidant ammonium p...
Robot Car for Exploring Dangerous environments controlled by Bluetooth
Car controlling one of the projects that get a lot of attention in this days. There are many challenges generated during implementation of system especially when the car connected with number of sensors and that mean the...
Convolutional Neural Network (CNN) and GMM Supervectors in Video Concept Detection.
Video concept detectionplays an important role in digital image processing. Video concept detectionis defined as detecting the concepts that are present in the videoshots. Concept canbeanything of users’ interest. Video...
Design And Fabrication of Syringe Needle Crusher
The rapid development in every facet of human endeavors like the financial, industrial, technological, economic, social, etc., leads to more waste being generated and needs to be disposed of without causing a hazard to t...
Fuzzy Rough Set Based Network Intrusion Detection with Wrapper Subset Evaluator
With the growing penetration of Internet, concerns of cyber security is looming high world-wide. In one hand there is enthusiasm to develop internet based applications for wider access, on the other hand seriousefforts a...