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Study of equilibrium,Kinetic,thermodynamic and mechanism of trivalent chromium retention from tannery effluent by calcined layered double hydroxide
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نویسنده
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lahkale r. ,sadik r. ,elhatimi w. ,khiar e. ,sabbar e.
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منبع
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journal of materials and environmental science - 2016 - دوره : 7 - شماره : 4 - صفحه:1 -13
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چکیده
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The removal of trivalent chromium from tannery effluent was carried out by adsorption using a mixed oxide of magnesium and aluminum obtained after calcination of a layered double hydroxide. this work requires the control and optimization of various parameters such as the effect of contact time,ph,adsorbent dose,chromium initial concentration and temperature. the removal of trivalent chromium from tannery effluent is a rapid process. in fact,in the ambient temperature (25°c),the adsorption equilibrium is reached after 30 min and the kinetic process is successfully fitted by pseudo-second-order model. in addition,the adsorption of trivalent chromium follows the freundlich isotherm. the effect of temperature on the adsorption process of chromium was also studied and the thermodynamic parameters were determined.
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کلیدواژه
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Chromium adsorption; Layered double hydroxides; Tannery effluent; Thermodynamic parameters; Trivalent chromium
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آدرس
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laboratory of physic and chemistry of materials (lpcm),department of chemistry,university chouaîb doukkali,el jadida, Morocco, laboratory of physic and chemistry of materials (lpcm),department of chemistry,university chouaîb doukkali,el jadida, Morocco, laboratory of physic and chemistry of materials (lpcm),department of chemistry,university chouaîb doukkali,el jadida, Morocco, laboratory of physic and chemistry of materials (lpcm),department of chemistry,university chouaîb doukkali,el jadida, Morocco, laboratory of physic and chemistry of materials (lpcm),department of chemistry,university chouaîb doukkali,el jadida, Morocco
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Authors
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