Experimental design and response surface modeling for optimization of humic substances removal by activated carbon: A kinetic and isotherm study
Journal Title: Journal of Advances in Environmental Health Research (JAEHR) - Year 2015, Vol 3, Issue 2
Abstract
The presence of humic acid (HA) in water treatment processes is very harmful and the cause of undesirable color, taste, and smell. Drinking water containing high concentrations of humic substances can be the cause of many health problems. Therefore, the removal of these compounds from water resources is a very important topic. In this research, response surface methodology (RSM) has been used to optimize the effect of main operational variables responsible for higher HA removal by activated carbon (AC). A three-level Box–Behnken factorial design (BBD) was used to optimize initial concentration of HA, time, pH, and AC dose for humic substances removal. The characterization of AC was carried out using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD) analysis. A coefficient of determination (R2) value of 0.98, model F-value of 82.32 and its low P-value (F < 0.0001), and low value of coefficient of variation (9.94%) indicated the fitness of the response surface quadratic model during the present study. At initial optimum concentration (5.25 mg HA/L), pH (5.85), contact time (36.01 minutes), and dose (1.38 g AC/L), the model predicted 1.90 mg HA/L. Equilibrium adsorption of HA onto AC had best fitness with the Freundlich isotherm and pseudo-second-order kinetic model.
Authors and Affiliations
Ahmad Reza Yazdanbakhsh, Yalda Hashempour
Keywords
Related Articles
- EP ID EP420376
- DOI 10.22102/JAEHR.2015.40191
- Views 137
- Downloads 0
Assessing landfill leachate heavy metal effect on the surface water quality: A case of Gheshlagh River, Sanandaj City, Iran
Pollution resulted from the leachate of the Sanandaj City landfill into Gheshlagh River is an important environmental and health issue, which has endangered the river. Having a population of more than 400,000 and four mu...
Synthesis and characterization of acrylic acid grafted gum tragacanth and its effect in Fe2+removal
In this paper, grafting of acrylic acid monomer on Gum tragacanth was performed. Variable of experiment included concentration of initiators and monomer, time, and temperature. Grafting efficiency was measured in the ter...
Toxicological assessment of inorganic arsenic and zinc content in button mushrooms
Nowadays, discharge of toxic heavy metals into the environment is anincreasing global concern. In light of this and that the per capita consumption of mushrooms has increased in Iran, the current study was carried out to...
Evaluating efficiency of radio waves for microbial removal in water samples
The most common used methods for water disinfection were chemicals like chlorine, ozonation, ultraviolet radiation, membrane processes, etc. Water disinfection using irradiation techniques is new in water treatment indus...
Estimating the health effects of PM10 on the population of Sanandaj City during 2010–2014 using AirQ model
One of the air pollutant indices includes particulate matter with aerodynamic diameter less than or equal to 10 μg/m3 (PM10). Particulate matter has extensive effects on the respiratory and cardiovascular systems. Dissem...