Novel chitosan/polyvinyl alcohol/talc composite for adsorption of heavy metals and dyes from aqueous solution

Graphene for its unique physical structure, excellent mechanical, electrical and physical properties has been widely applied in nanoelectronics, microelectronics, energy storage material, composite materials and so on. In recent years, many researchers found graphene have outstanding adsorption capacity of contaminants in aqueous solution due to its high specific surface area. This paper summarized the graphene, graphene oxide and functionalized graphene removing various heavy metals in waste water.

Download Full-text

Removal of Heavy Metals from Aqueous Solution by Hydroxyapatite/Chitosan Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.789.176 ◽

2013 ◽

Vol 789 ◽

pp. 176-179 ◽

Cited By ~ 3

Author(s):

Eny Kusrini ◽

Nofrijon Sofyan ◽

Dwi Marta Nurjaya ◽

Santoso Santoso ◽

Dewi Tristantini

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Metal Ions ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray ◽

Removal Of Heavy Metals ◽

Sem Micrograph ◽

Pseudo Second Order ◽

Chitosan Composite

Hydroxyapatite/chitosan (HApC) composite has been prepared by precipitation method and used for removal of heavy metals (Cr6+, Zn2+and Cd2+) from aqueous solution. The HAp and 3H7C composite with HAp:chitosan ratio of 3:7 (wt%) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy-energy dispersive X-ray spectroscopy. The SEM results showed that HAp is spherical-shaped and crystalline, while chitosan has a flat structure. SEM micrograph of 3H7C composite reveals crystalline of HAp uniformly spread over the surface of chitosan. The crystal structure of HAp is maintained in 3H7C composite. Chitosan affects the adsorption capacity of HAp for heavy metal ions; it binds the metal ions as well as HAp. The kinetic data was best described by the pseudo-second order. Surface adsorption and intraparticle diffusion take place in the mechanism of adsorption process. The binding of HAp powder with chitosan made the capability of composite to removal of Cr6+, Zn2+and Cd2+from aqueous solution effective. The order of removal efficiency (Cr6+> Cd2+> Zn2+) was observed.

Download Full-text

Removal of heavy metals from aqueous solution by apple residues

Process Biochemistry ◽

10.1016/s0032-9592(97)00055-1 ◽

1998 ◽

Vol 33 (2) ◽

pp. 205-211 ◽

Cited By ~ 98

Author(s):

Sung Ho Lee ◽

Chong Hun Jung ◽

Hongsuk Chung ◽

Moo Yeal Lee ◽

Ji-Won Yang

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Removal Of Heavy Metals

Download Full-text

Preparation of macroporous bead adsorbents based on poly(vinyl alcohol)/chitosan and their adsorption properties for heavy metals from aqueous solution

Chemical Engineering Journal ◽

10.1016/j.cej.2011.10.012 ◽

2011 ◽

Vol 178 ◽

pp. 60-68 ◽

Cited By ~ 110

Author(s):

Xiaoli Li ◽

Yanfeng Li ◽

Zhengfang Ye

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Vinyl Alcohol ◽

Adsorption Properties ◽

Poly Vinyl Alcohol

Download Full-text

Acute Mercury Poisoning After Polyvinyl Alcohol Preservative Ingestion

PEDIATRICS ◽

10.1542/peds.66.1.132 ◽

1980 ◽

Vol 66 (1) ◽

pp. 132-134

Author(s):

James Seidel

Keyword(s):

Aqueous Solution ◽

Acetic Acid ◽

Polyvinyl Alcohol ◽

Mercuric Chloride ◽

Medical Center ◽

Mercury Poisoning

Polyvinyl alcohol preservative (PVA) is used routinely in the laboratory for collection of specimens for examination for ova and parasites.1-4 PVA, presently used at Harbor-UCLA Medical Center, contains: 4.5% mercuric chloride, 5% polyvinyl alcohol, 30% denatured alcohol, 4.5% acetic acid, and 1.5% glycerin in an aqueous solution. The kit, as shown in the Figure, contains three bottles with 10-ml aliquots of PVA, wooden sticks for mixing the specimen, and written instructions for collection of the specimens. The bottles are clearly labeled as poison in English and Spanish, and specific verbal as well as written instructions are given to patients and their families when the ova and parasite kits are dispensed.

Download Full-text