Sorption kinetic studies using metal chelate embedded polymers for recovery of heavy metals from desalination effluents

2011 ◽  
Vol 4 (3) ◽  
pp. 261 ◽  
Author(s):  
T.L. Prasad ◽  
P.K. Tewari ◽  
D. Sathiyamoorthy
Keyword(s):  
Heavy Metals ◽  
Metal Chelate ◽  
Kinetic Studies ◽  
Sorption Kinetic

scholarly journals Adsorption of heavy metals by road deposited solids

2013 ◽  
Vol 67 (11) ◽  
pp. 2622-2629 ◽  
Author(s):  
Chandima Gunawardana ◽  
Ashantha Goonetilleke ◽  
Prasanna Egodawatta
Keyword(s):  
Heavy Metals ◽  
Kinetic Studies ◽  
Field Studies ◽  
Water Soluble ◽  
Trivalent Cation ◽  
Urban Road ◽  
High Charge Density ◽  
Road Surfaces ◽  
Adsorption Desorption ◽  
Exchangeable Form

The research study discussed in the paper investigated the adsorption/desorption behaviour of heavy metals commonly deposited on urban road surfaces, namely, Zn, Cu, Cr and Pb, for different particle size ranges of solids. The study outcomes, based on field studies and batch experiments, confirmed that road deposited solids particles contain a significantly high amount of vacant charge sites with the potential to adsorb additional heavy metals. Kinetic studies and adsorption experiments indicated that Cr is the most preferred metal element to associate with solids due to the relatively high electronegativity and high charge density of trivalent cation (Cr3+). However, the relatively low availability of Cr in the urban road environment could influence this behaviour. Comparing total adsorbed metals present in solids particles, it was found that Zn has the highest capacity for adsorption to solids. Desorption experiments confirmed that a low concentration of Cu, Cr and Pb in solids was present in water-soluble and exchangeable form, whilst a significant fraction of adsorbed Zn has a high likelihood of being released back into solution. Among heavy metals, Zn is considered to be the most commonly available metal among road surface pollutants.

scholarly journals Kinetic Studies of Adsorption of Heavy Metals on Clays

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
O. Olaofe ◽  
S. A. Olagboye ◽  
P. S. Akanji ◽  
E. Y. Adamolugbe ◽  
O. T. Fowowe ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Kinetic Studies

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

1978 ◽  
Vol 51 (2) ◽  
pp. 613-617 ◽  
Author(s):  
Kiyochika Yahikozawa ◽  
Toshiro Aratani ◽  
Ryuzo Ito ◽  
Takataro Sudo ◽  
Takeo Yano
Keyword(s):  
Heavy Metals ◽  
Kinetic Studies ◽  
Removal Of Heavy Metals ◽  
Calcium Polysulfide

scholarly journals Kinetic and Thermodynamics of Adsorption of Heavy Metals from Spent Automobile Engine Oil onto Activated Carbon from Thevetia peruviana

2019 ◽  
Vol 1 ◽  
pp. 167-175
Author(s):  
L Leke ◽  
T H Dekaa ◽  
S O Olawuyi ◽  
F O Nwosu
Keyword(s):  
Heavy Metals ◽  
Free Energy ◽  
Activated Carbon ◽  
Rate Constants ◽  
Kinetic Studies ◽  
Engine Oil ◽  
Thermodynamic Studies ◽  
Thevetia Peruviana ◽  
Dry Ashing ◽  
Gibb’S Free Energy

The presence of heavy metals was analysed from oil samples employing the dry ashing method. The specific densities and viscosities of the spent and virgin AZ oil samples were determined and found to be 0.9230, 0.9501 and 70.27, 73.27cP respectively. Kinetic and thermodynamic studies of the adsorption of lead (Pb) and chromium (Cr) from the spent oil was also investigated. The spent oil samples were digested and mixed with methyl isobutyl ketone (MIBK), agitated with activated carbon produced from Thevetia peruviana (bush milk) shells at various contact times of 2, 4, 5, 10, 15, 20, 30, 40, 50, 60, 90 and 120 minutes. Kinetic studies revealed that for lead (Pb), the rate constants were found to be 0.044, 0.060 and 0.067 ppm/min at 27oC, 35 oC and 45 oC, respectively, while higher values or rate constants of 0.126, 0.127 and 0,168 ppm/min were observed at 27 oC, 35 oC and 45 oC, respectively, for chromium (Cr). For the thermodynamic studies the Gibb's free energy (ΔG) values were; –1.29, -1.61 and –1.82 KJmol-1at 27 oC, 35 oC and 45 oC, respectively, indicating spontaneity. However, the Gibb's free energy (ΔG) for chromium showed +0.050, -2.13 and -2.14 KJmol-1at 27 oC, 35 oC and 45 oC, indicating non-spontaneity at 27 oC. The positive values of ΔS for both metals with Pb (21 - 30 Jmol-1) and Cr (695 – 1867 Jmol-1 ) indicated that the metals were dissociatively adsorbed onto the adsorbent while for the E values, Cr (8 – 61 KJmol-1) had a higher than with Pb (6 – 35 KJmol-1) further explaining the non-spontaneity of the process for Cr at some reaction condition.

Assay of Heavy Metals Using Antibodies to Metal—Chelate Complexes

1996 ◽  
pp. 10-22 ◽  
Author(s):  
Diane A. Blake ◽  
Gary N. Dawson ◽  
Pampa Chakrabarti ◽  
Frank M. Hatcher
Keyword(s):  
Heavy Metals ◽  
Metal Chelate ◽  
Chelate Complexes

Equilibrium and kinetic studies in adsorption of heavy metals using biosorbent: A summary of recent studies

2009 ◽  
Vol 162 (2-3) ◽  
pp. 616-645 ◽  
Author(s):  
Jonathan Febrianto ◽  
Aline Natasia Kosasih ◽  
Jaka Sunarso ◽  
Yi-Hsu Ju ◽  
Nani Indraswati ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Kinetic Studies
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