Comparison of remov al of bro mothymol blue from aqueous solution by r awMWCNT and Zn(OH)۲ n anopartic le loaded on activated carbon Zn (OH)۲-NP -AC: kinetic, isoth erm and thermodyn amic inv estigation of rem oval process

Color ed wastewater as a consequence of waste generated by applied in the textile and other industries arrive to various ecosystems. Various physical and chemical methods such as coagulation, reverse osmosis, photo-degradation, electrochemic al oxidation, ozonatio n and adsorp tion, etc. Among all these meth ods adsorption is a po pular alter native proce dure, because of its lo w cost, si mple design, easy operation and the possibil ity of adso rbent recycling. In this paper multiw alled carbon nanotube (rawMWCN T) and Zn( OH)۲ nanopa rticle loaded on activ ated carbo n (Zn(۰H) ۲–NP-AC) adsorbents applied for remov al of bromo thymolblue (BTB). This dye is the most approp riate pH ind icator in physiological tissue and u sed in the i nvestigation of the interaction of lipid with protein. It is widely appli ed in biomedical, biolo gical, and c hemical engineering ap plications. It is sometimes used to d efine cell walls or nuclei under the microscop e. The adsorption rates were evaluated by fittin g the experimental data to conventional kinetic models such as pseudo first-order, pseudo second-order and intrapar ticle diffusion model. T he effects of temperatu re on the a dsorption process were determined and the thermodynamic parameter s such as ch anges in free energy (ΔG۰),

کلیدواژه ها:

Bromothymol blue ، Zn( OH)۲-NP-A C ، RawM WCNT ، Kinetic ، Isotherm ، Therm odynamics.