Iranian Journal Of Health Sciences
علوم بهداشتی ایران
Iran J Health Sci
Medical Sciences
http://jhs.mazums.ac.ir
1
admin
2322-553X
2322-4797
10.29252/jhs
en
jalali
1392
12
1
gregorian
2014
3
1
2
1
online
1
fulltext
en
Removal of Acid Orang 7(AO7) Dye from Aqueous Solution by Using of Adsorption on to Rice Stem Waste: Kinetic and Equilibrium Study
بهداشت محیط زیست
Environmental Health
پژوهشي
Original Article
Background and purpose: dye is widely used in industries such as cosmetic, leather, paper and textile and release to the environment via their effluents. The purpose of this study was to compare the efficiency of low-cost adsorbents in acid orang 7 dyes removal from water.
Materials and Methods: The Rice Stem biomass was sun dried, crushed and sieved to particle sizes in range of 1-2 mm. Then treated with 2.0 mol/L nitric acid for a period of 1 h followed by washing with distilled water and finally washed Stem was dried at 105◦ in oven. The residues concentration of acid orang 7 dyes was measured by spectrophotometer in λmax of 452 nm. The effect of pH, contact time and initial AO7 dye concentration, kinetic and isotherm models were studied. Then data interpreted and analyzed by Excel 16 software.
Results: The pH value of 3, contact time of 75 min, adsorbent dosage of 8 g/L and dye concentration were 10 mg/l determined as optimum conditions for adsorbents. The most acid orang 7 dyes removal efficiency of 98% was obtained for modified Rice Stem in optimum conditions. The equilibrium data is best fitted on Langmuir isotherm and the adsorption kinetic model follows pseudo-second model.
Conclusion: Based on data obtained in this study, it can be concluded that adsorption by modified Rice Stem
Adsorption, Acid Orang 7, Kinetics, Rice Stem
51
61
http://jhs.mazums.ac.ir/browse.php?a_code=A-10-343-24&slc_lang=en&sid=1
Ramazan Ali
Diyanati Tilaki
10031947532846001442
10031947532846001442
No
Department of Environmental Health Engineering, Faculty of Health and Health Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran
Davoud
Balarak
10031947532846001443
10031947532846001443
Yes
Student Research Committee, Department of Environmental Health, School of Health, Mazandaran University of Medical Sciences, Sari, Iran
Mehdi
Ghasemi
10031947532846001444
10031947532846001444
No
Student Research Committee, Department of Environmental Health, School of Health, Mazandaran University of Medical Sciences, Sari, Iran