Thesis (Ph. D.)--McGill University, 4 positive microfiche. lective retention of heavy metal ions. Polikarpov’ in. Biosorption potentially could be used for recovery as well as for Estimated Reading Time: 4 mins heavy metals, heavy metals may be harmful to both human and aquatic life as they are non-degradable and persistent. Heavy metals are considered to be the following elements: Copper, Silver, Zinc, Cadmium, Gold, Mercury, Lead, Chromium, Iron, Nickel, Tin, Arsenic, Selenium, Molybdenum, Cobalt, Manganese, and blogger.com Size: 1MB Thesis On Biosorption Of Heavy Metals, Top Presentation Ghostwriters Site For University, Application Letter Application Letter, Georgetown University Essay Prompts “It is such a pain to write all the assignments I get in college!/10()
Biosorption of heavy metals from drinking water using fruit and vegetable peels
Show full item record. View Item OUR Archive Home Research Types Thesis Thesis - Doctoral View Item. JavaScript is disabled for your browser. Some features of this site may not work without it. Biosorption of heavy metals from drinking water using fruit and vegetable peels Nathan, phd thesis on biosorption of heavy metals, Risha Jasmine. pdf 5. Cite this item: Nathan, R. Biosorption of heavy metals from drinking water using fruit and vegetable peels Thesis, Doctor of Philosophy.
University of Otago. Abstract: Heavy metals in drinking water are a serious global concern and efforts are underway to develop sustainable decontamination techniques. The present project was developed with an aim to prepare biosorbents for treating household drinking water.
Six natural fruit and vegetable peels FVPsnamely, apple peel APbanana peel BPcucumber peel CPkiwifruit peel KPorange peel OP and potato peel PP were immobilised on sodium alginate SA beads and used as biosorbents for the removal of one metalloid and six heavy metal ions, namely, arsenic As Vcadmium Cd IIchromium Cr VIcopper Cu IImercury Hg IIlead Pb II and nickel Ni II from drinking phd thesis on biosorption of heavy metals. Batch experiments were performed to study some of the main parameters that influence the biosorption process, phd thesis on biosorption of heavy metals, namely, contact time, pH, biosorbent concentration, phd thesis on biosorption of heavy metals, initial ion concentration and temperature, using solutions prepared by spiking the ions in distilled deionised laboratory water.
A comparison of the biosorption efficacies of the various FVP beads was made, and biosorption was studied in spiked real drinking water collected from a mine region in New Zealand. The surface of the beads was imaged using scanning electron microscopy coupled with energy dispersive spectroscopy, and the concentration of ions in solution was measured using inductively coupled plasma with a mass spectrometer detector.
The applicability of kinetic models such as film diffusion, pore diffusion, pseudo-first order, pseudo-second order and Elovich equation was examined using the biosorption data. A novel effort to study isotherms and thermodynamics in non-equilibrium conditions was made using the Probability Isotherm theory proposed for biochemical reactions. The suitability of isotherm models such phd thesis on biosorption of heavy metals Langmuir, Freundlich, Temkin and Dubinin-Radushkevich to non-equilibrium data was examined.
The nature of the binding of the ions to the surface of the beads and the energy changes involved were determined from the parameters calculated in these models. The results showed that the roughness and heterogeneity of the surface was related to the biosorption efficacy of the beads. Therefore, FVP beads were better performing relative to the SA beads. CP and KP beads had the highest biosorption capacities, followed by AP and BP beads. The beads also showed different affinities for the ions.
The beads successfully removed metal ions in the drinking water pH range. The use of more number of beads in solution resulted phd thesis on biosorption of heavy metals an increase in biosorption percentage but also a corresponding decrease in the biosorption capacity of the beads.
In contrast, phd thesis on biosorption of heavy metals, at higher ion concentrations up to 15 mgL-1there was a decrease in the biosorption percentage and a corresponding increase in the biosorption capacity of the beads.
The temperature of the solution played a significant role in the biosorption process and affected the uptake of the ions to various degrees. Furthermore, the presence of co-ions suppressed the biosorption of individual ions and this was observed both in laboratory and real drinking water. In conclusion, CP and KP beads showed the most promising removal of heavy metals from drinking water, but no bead could significantly biosorb As. Appropriate modifications to the beads will be required to increase heavy metal ion biosorption when many competing natural ions are present in drinking water.
If that is achievable, then this technology could revolutionise drinking water treatment processes especially in developing countries where low cost purification systems are needed. Advisor: Rosengren, Rhonda J; Martin, Candace E. Degree Name: Doctor of Philosophy. Degree Discipline: Pharmacology and Toxicology. Publisher: University of Otago. Keywords: Biosorption ; Heavy Metal ; Drinking water ; Fruit peel ; Vegetable peel ; Multi ion ; Adsorption ; New Zealand.
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REMOVAL OF HEAVY METALS FROM WASTE WATER BY ADSORPTION USING CARICA PAPAYA SEEDS BATCH 28
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Biosorption of heavy metals from drinking water using fruit and vegetable peels (Thesis, Doctor of Philosophy). University of Otago. Retrieved from blogger.com Heavy metals in drinking water are a serious global concern and efforts are underway to develop sustainable decontamination blogger.com: Risha Jasmine Nathan PUNCTUAL AND FAST We provide cheapest essay writing service. We are Thesis On Biosorption Of Heavy Metals ready to fulfill the order in the time in which it is necessary! In the event that the term of performance of the course and Thesis On Biosorption Of Heavy Metals control work will be less than 1 day, the cost of work will be increased depending on its urgency/10() heavy metals, heavy metals may be harmful to both human and aquatic life as they are non-degradable and persistent. Heavy metals are considered to be the following elements: Copper, Silver, Zinc, Cadmium, Gold, Mercury, Lead, Chromium, Iron, Nickel, Tin, Arsenic, Selenium, Molybdenum, Cobalt, Manganese, and blogger.com Size: 1MB
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