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Treatment of Synthetic Textile Wastewater using Enhanced Adsorption onto Calcium Alginate Polymer in the Presence of Ultrasonic Waves
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R Darvishi Cheshmeh Soltani    , B.S Davoodi , M* Safari * |
| Kurdistan University of Medical Sciences, Sanandaj, Iran |
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Abstract: (1353 Views) |
Background & objectives: Contamination of water resources is one of the most important health and environmental concerns related to textile wastewater. In the present study, sodium alginate natural polymer was implemented as adsorbent for the adsorption of an organic dye (Basic Red 46) in aquatic phase. As a novel approach, adsorption process was enhanced using ultrasonic irradiation.
Methods: In this study, at first, sodium alginate polymeric adsorbent was synthesized. Then, the enhanced adsorption process of the dye was performed in a discontinuous flow experimental reactor located inside an ultrasonic bath. The effects of parameters such as initial pH, reaction time, dye concentration and adsorption content on the enhanced adsorption of the target pollutant were investigated. Residual concentration of the dye in the solution was measured using a UV-visible spectrophotometer at 530 nm.
Results: The results showed that adsorption alone was responsible for the decolorization efficiency of 20.8%, while ultrasound-assisted adsorption of organic dye resulted in the enhanced removal efficiency of 63.2%. Increasing initial concentration of the dye from 3 to 10 mg/L led to decreasing the removal efficiency from 83.1 to 42.9%, respectively. With increasing adsorbent dosage from 0.3 to 0.7 g/L, the removal efficiency increased from 41.9 to 67.3%, respectively. Increasing the amount of adsorbent to 1.0 g/L resulted in the remarkable reduction in the removal of organic dye. The adsorption data obeyed the Langmuir model with the maximum adsorption capacity of 9.2 mg/g.
Conclusions: It can be indicated that the ultrasound can be applied as an efficient physical agent for the enhanced adsorption of organic dyes onto natural polymeric compounds like calcium alginate. |
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| Keywords: Adsorption, Ultrasound, Natural Polymer, Textile Dye |
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Full-Text [PDF 456 kb]
(603 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2021/05/22 | Accepted: 2021/04/30 | Published: 2021/04/30
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