Kinetic Studies on the Lime Sulfurated Solution (Calcium Polysulfide) Process for Removal of Heavy Metals from Wastewater

Batch adsorption experiments were carried out to remove heavy metals Cu(II)and Ni(II) by pyromellitic dianhydride (PMDA) grafted β-Cyclodextrin (β-CD). The effects concerning the pH of the solution, contact time and initial heavy metal concentration were studied and discussed. The adsorption values increased significantly after a large number of carboxyl groups were gragfted on the microspheres surface. In order to investigate the mechanism of sorption, adsorption data were modeled using the pseudo-first-order and pseudo-second-order kinetic equation. It was found that kinetic studies showed good correlation coefficients for a pseudo-second-order kinetic model, confirming that the sorption rate was controlled by chemical adsorption. The equilibrium process was better described by the Langmuir isotherm than the Freundlich isotherm. XPS analysis further confirmed that the carboxyl group which grafted on the surface of the β-CD microspheres play a very important role in the removal of heavy metals.

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Adsorption equilibrium and kinetic studies on effective removal of heavy metals onto modified cellulose bearing Schiff base with pyridine chelating groups from aqueous solution

International Journal of Materials and Product Technology ◽

10.1504/ijmpt.2017.084967 ◽

2017 ◽

Vol 55 (1/2/3) ◽

pp. 188 ◽

Cited By ~ 1

Author(s):

Saravanan Rajayyan ◽

Ravikumar Lingam

Keyword(s):

Heavy Metals ◽

Aqueous Solution ◽

Schiff Base ◽

Adsorption Equilibrium ◽

Kinetic Studies ◽

Effective Removal ◽

Removal Of Heavy Metals ◽

Chelating Groups ◽

Modified Cellulose

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Kinetic studies of the removal of heavy metals from acid mine drainage by natural zeolite

International Journal of Mineral Processing ◽

10.1016/j.minpro.2011.07.004 ◽

2011 ◽

Vol 101 (1-4) ◽

pp. 42-49 ◽

Cited By ~ 47

Author(s):

T. Motsi ◽

N.A. Rowson ◽

M.J.H. Simmons

Keyword(s):

Heavy Metals ◽

Acid Mine Drainage ◽

Natural Zeolite ◽

Mine Drainage ◽

Kinetic Studies ◽

Acid Mine ◽

Removal Of Heavy Metals

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Removal of Heavy Metals from Aqueous Solutions Using Acrylic-modified Sugarcane Bagasse-based Adsorbents: Equilibrium and Kinetic Studies

BioResources ◽

10.15376/biores.9.2.3184-3196 ◽

2014 ◽

Vol 9 (2) ◽

Cited By ~ 12

Author(s):

Weiqing Kong ◽

Junli Ren ◽

Shuaiyang Wang ◽

Qifeng Chen

Keyword(s):

Heavy Metals ◽

Aqueous Solutions ◽

Sugarcane Bagasse ◽

Kinetic Studies ◽

Removal Of Heavy Metals

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Sorption of Heavy Metals with Sol-Gel Particles Containing Crude Metallothionein Extracts from Scchizosaccharomyces pombe

Water Quality Research Journal ◽

10.2166/wqrj.2007.015 ◽

2007 ◽

Vol 42 (2) ◽

pp. 123-129

Author(s):

Shirin Bahrami ◽

Amarjeet S. Bassi ◽

Ernest K Yanful

Keyword(s):

Heavy Metals ◽

Sol Gel ◽

Kinetic Studies ◽

Adsorption Kinetic ◽

Nacl Solution ◽

Protein Extract ◽

Removal Of Heavy Metals ◽

Immobilization Matrix ◽

Desorption Isotherms ◽

Zinc Adsorption

Abstract Crude metallothionein (MT) extracts from Scchizosaccharomyces pombe entrapped in sol-gels were investigated for the removal of heavy metals such as cadmium and zinc. The sol-gel provided a robust immobilization matrix for the protein extract. Adsorption and desorption isotherms were developed for both cadmium and zinc. Both metals were recovered from the sol-gel by desorption using a 1 M NaCl solution. The adsorption kinetic studies showed that cadmium and zinc adsorption followed the Langmuir isotherm. The distribution factors for cadmium and zinc were found to be 5.43 L/mg and 2.88 L/mg, respectively. Greater than 60% of Zn2+ was also removed using MT sol-gels. The experiments demonstrated that MT has a greater capacity for Cd than polyethyleneimine immobilized in the sol-gels. The adsorption capacity of MT was found to be 588.2 mg of cadmium and 434.8 mg of zinc per gram of immobilized MT, which is significantly higher than with nonbiological chelators such as polyethyleneimine or EDTA.

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