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Abstract
The use of low-cost locally available adsorbent, sawdust for the removal of methylene blue (MB) dye in a batch adsorber system has been investigated. The experimental data fitted best in Langmuir isotherm as compared to Freundlich and Temkin isotherms, showing maximum adsorption capacity of 76.92 mg/g. The study revealed that the adsorption of MB dye onto sawdust follows pseudo-second-order kinetic model and the same has been used in design of a two-stage batch adsorber by minimizing total contact time to attain a fixed percentage of MB dye removal. The minimum contact time required for the removal of MB dye with 99% efficiency has been found as 37.54 min.
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1 Department of Civil Engineering, Institute of Engineering and Technology, Lucknow 226021, Uttar Pradesh, India
2 Department of Mechanical Engineering, Lucknow Model Institute of Technology and Management, Lucknow 227305, Uttar Pradesh, India
3 Department of Civil Engineering, Indian Institute of Technology (B.H.U.), Varanasi 221005, Uttar Pradesh, India
4 Department of Civil Engineering, Indian Institute of Technology Roorkee, Bhargava Lane, Devpura, Haridwar 249401, Uttarakhand, India
5 Department of Chemistry, Babu Banarasi Das National Institute of Technology, Lucknow 226028, Uttar Pradesh, India
6 Department of Civil Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur 273010, Uttar Pradesh, India
7 Central Pollution Control Board, New Delhi 110037, India
8 Environmental Monitoring Division, CSIR-Indian Institute of Toxicology Research, M.G. Marg, Lucknow 226001, Uttar Pradesh, India