Removal of Acid Orange 7 dye from aqueous solutions by adsorption onto Kenya tea pulps; granulated shape
Journal Title: Electronic Physician - Year 2017, Vol 9, Issue 5
Abstract
BACKGROUND AND AIM: Water resources pollution control is one of the main challenges of our time for researchers. Colored wastewater discharges caused by textile industry activities has added to the concern. In this study, removal of Acid Orange 7 dye (AO7) using Kenya Tea residue absorbent (granular) has been studied. METHODS: This cross-sectional study was conducted in 2016. In this work, initially, tea residue was prepared in three forms of raw, treated with concentrated phosphoric acid, and carbonated, at temperatures of 350, 450 and 500 °C in the chemistry laboratory of Gonabad University of Medical Sciences. Then, efficiency of the above absorbents in the removal of Acid Orange 7 dye in initial concentrations of dye as 50-500 mg/l from water samples in terms of pH 2-10 and 1-10 g/l of adsorbent dose within 20 to 300 minutes was investigated. In addition, their subordination from Langmuir and Freundlich absorption isotherms was also determined. Concentration changes in Acid Orange 7 dye at a wavelength of 483 nm was determined by spectrophotometry and results were reported using descriptive statistics. RESULTS: Results showed that efficiency of Acid Orange 7 dye removal is higher in acidic pH and higher adsorbent dosage. The highest efficiency of Acid Orange 7 dye removal was 98.41% by raw tea residue absorbent at pH 2, reaction time was 120 minutes and initial concentration of dye was 50 mg/l, which was obtained at adsorbent dosage of 10 g/l. It was determined that the mechanism of absorption acceptably follows Freundlich absorption isotherm (R2=0.97). CONCLUSION: Due to the availability and very low price, optimal performance of Kenya tea raw residue (granular) in Acid Orange 7 dye removal, it can be used as an efficient surface absorber in an absorber from colored wastewater
Authors and Affiliations
Behnaz Naraghi, Fahimeh Zabihi, Mohammad Reza Narooie, Mahdi Saeidi, Hamed Biglari
Keywords
Related Articles
- EP ID EP321098
- DOI 10.19082/4312
- Views 108
- Downloads 0
Development and validation of a questionnaire to evaluate the state of Iranian hospital nutrition support
BACKGROUND: Recently, nutrition support was implemented as a part of clinical services in hospitals. The implementation of nutrition support needs to be assessed for its improvement. OBJECTIVE: This study aimed to devel...
Pattern of childhood brucellosis in Najran, south Saudi Arabia in 2013-2017.
BACKGROUND: With more than 500,000 new cases annually, human brucellosis is the commonest zoonotic disease worldwide. In some endemic countries, its prevalence is more than 10 per 100,000 population. OBJECTIVE: The aim...
Factors Affecting Quality of Emergency Service in Iran’s Military Hospitals: A Qualitative Study
INTRODUCTION: Quality is a key factor for the success of any organization. Moreover, accessing quality in the emergency department is highly significant due to the sensitive and complex role of this department in hospita...
Prevalence of idiopathic hypercalciuria in children with urinary system related symptoms attending a pediatric hospital in Bandar Abbas in 2014
BACKGROUND: Idiopathic hypercalciuria is a group of diseases which can be manifested with urinary symptoms. Its importance is due to high prevalence, recurrent infections, and stone formations which are often asymptomati...
Depression from the perspective of modern and Persian medicine
BACKGROUND: Depression is one of the five most-common diseases globally, and is expected to be the second leading cause of disability by 2020 and its economic and social burden is a major problem worldwide. OBJECTIVE: T...