TN888 : Preparation of the Membrane of Porous Kaolinite Combined with Lanthanum and its Application for the Purification of Industrial Wastewater
Thesis > Central Library of Shahrood University > Mining, Petroleum & Geophysics Engineering > MSc > 2018
Authors:
Zohreh Moradzadeh [Author], Kumars Seifpanahi-Shabani[Supervisor]
Abstarct: Nowaday, due to lack of clean water, it’s purification is one of the most important human issues The water used in the industrial cycle can also be refined and reused. Heavy mextals are one of the most important contaminating agents in the water. Kaolinite is a mineral that is used to treat water and wastewater. In this research, porous powders were used to purify the wastewater in high temperature or potentially corrosive environments for a which are remained long time without degradation or change. The production of powder and its ingredients cost a lot. Kaolinite is a cheap material. which, by adding lanthanum to it, the powder is more permeable and stronger. In the process of forming powder, porous pore formations are created. In this powder, a carbon nanotube network (CNTN) was added to the porous channel of kaolinite and lanthanum powder. XRD, FTIR and SEM analyzes were performed to detect adsorbent at each step of its correction. Surface characteristics of kaolinite and its adsorption characteristics for heavy mextals of lead and copper as contaminants in aqueous solutions have been investigated. Absorption capability was tested under different conditions of pH, temperature, concentration and adsorbent amount. Finally, the powder can be used in the treatment of wastewater with the highest possible efficiency. The adsorption isotherms showed that copper and lead ions can be described using Radlich-Patterson and Tamkin models, respectively. The kinetic calculations for copper and lead showed that both of them follow the pseudo-second-order model. Regarding the thermodynamic parameters, negative values of ΔG at different temperatures indicate that the absorption of ions is spontaneous, and the rection is exothermal and is of an irregular arrangement. Kaolinite has a significant potential for removal of heavy mextals from wastewater and aqueous phase.
Keywords:
#Modified kaolinite #lead and copper ions #wastewater treatment #lanthanum Link
Keeping place: Central Library of Shahrood University
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