Imprinted polymers for the removal of heavy metal ions from water

2011 ◽  
Vol 64 (6) ◽  
pp. 1325-1332 ◽  
Author(s):  
Syed Ashraf ◽  
Angela Cluley ◽  
Ckarlos Mercado ◽  
Anja Mueller
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Capacity ◽  
Random Copolymer ◽  
Complete Removal ◽  
Ion Exchange Resins ◽  
Effective Removal ◽  
Removal Of Heavy Metals ◽  
Exchange Resins

In wastewater treatment, the removal of heavy metals is difficult due to the limited affinity of heavy metal ions to ion exchange resins. Here imprinting polymerization is used to develop resins with high capacity and selectivity for heavy metal ions for water treatment. A random copolymer of methacrylate and methacrylamide was found to be most effective for the removal of hydrophilic metal complexes, like CdCl2, ZnCl2, and the metalloid NaH2AsO4, particularly when the porosity of these resins is increased. For hydrophobic complexes imprinting emulsion polymerization was developed and data for the effective removal of mercury dithizonate will be described. Complete removal for up to 80 ppm of cadmium and mercury with only 200 mg of imprinted resin was obtained; competition and co-imprinting experiments are described as well.

scholarly journals A systematic study for removal of heavy metals from aqueous media using Sorghum bicolor: an efficient biosorbent

2018 ◽  
Vol 77 (10) ◽  
pp. 2355-2368 ◽  
Author(s):  
Khalida Naseem ◽  
Zahoor H. Farooqi ◽  
Muhammad Z. Ur Rehman ◽  
Muhammad A. Ur Rehman ◽  
Robina Begum ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Aqueous Media ◽  
Review Article ◽  
Isotherm Models ◽  
Adsorption Efficiency ◽  
Adsorption Isotherm Models ◽  
Removal Of Heavy Metals

Abstract This review is based on the adsorption characteristics of sorghum (Sorghum bicolor) for removal of heavy metals from aqueous media. Different parameters like pH, temperature of the medium, sorghum concentration, sorghum particle size, contact time, stirring speed and heavy metal concentration control the adsorption efficiency of sorghum biomass for heavy metal ions. Sorghum biomass showed maximum efficiency for removal of heavy metal ions in the pH range of 5 to 6. It is an agricultural waste and is regarded as the cheapest biosorbent, having high adsorption capacity for heavy metals as compared to other reported adsorbents, for the treatment of heavy metal polluted wastewater. Adsorption of heavy metal ions onto sorghum biomass follows pseudo second order kinetics. Best fitted adsorption isotherm models for removal of heavy metal ions on sorghum biomass are Langmuir and Freundlich adsorption isotherm models. Thermodynamic aspects of heavy metal ions adsorption onto sorghum biomass have also been elaborated in this review article. How adsorption efficiency of sorghum biomass can be improved by different physical and chemical treatments in future has also been elaborated. This review article will be highly useful for researchers working in the field of water treatment via biosorption processing. The quantitative demonstrated efficiency of sorghum biomass for various heavy metal ions has also been highlighted in different sections of this review article.

Effective Removal of Heavy Metal Ions Using Mn2O3 Doped Polyaniline Nanocomposite

2014 ◽  
Vol 14 (4) ◽  
pp. 2937-2946 ◽  
Author(s):  
K. Rajakumar ◽  
S. Dinesh Kirupha ◽  
S. Sivanesan ◽  
Rajamaniccam L. Sai
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Effective Removal ◽  
Doped Polyaniline ◽  
Polyaniline Nanocomposite

Ligand-immobilized spent alumina catalyst for effective removal of heavy metal ions from model contaminated water

2018 ◽  
Vol 6 (4) ◽  
pp. 4623-4633 ◽  
Author(s):  
Mirabbos Hojamberdiev ◽  
Shahlo S. Daminova ◽  
Zukhra C. Kadirova ◽  
Khasan T. Sharipov ◽  
Felix Mtalo ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Contaminated Water ◽  
Alumina Catalyst ◽  
Effective Removal
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