Ashanendu Mandal

Catalysis 2021
Ashanendu Mandal, Speaker at  Catalysis Conferences
Doctorate In Chemical Engineering At University Of Calcutta, India
Title : Adsorptive removal of toxic phenol from industrial wastewater using lowcost adsorbents


Phenol being toxic in nature needs to be removed from wastewater before its discharge. This research aims for removal of phenol through adsorption process using several low-cost adsorbents. Four bio-adsorbents such as guava tree bark, rice husk, neem leaves, activated carbon from coconut coir and four industrial waste adsorbents such as rice husk ash, red mud, clarified sludge from basic oxygen furnace, activated alumina were used in this research work. The surface characterization of the adsorbents were carried out by SEM, XRD, FTIR and BET analyzers. The phenol removal percentage by the adsorbents were investigated through batch experiments with the variation of initial phenol concentration (5-500 mg/L), initial pH (2-12), adsorbent dose (0.10-20 gm/L), temperature (25-50°C) and contact time (30-600 min). The maximum removal percentage was obtained as high as 97.50%. The experimental results were used for kinetic study which showed that the pseudo-second order was best fitted for all adsorbents except red mud and the adsorption mechanism was supportive of film diffusion, intraparticle diffusion and chemisorption for all adsorbents. The isotherm analysis suggested that Freundlich isotherm model was best supportive for guava tree bark, rice husk, neem leaves, activated carbon, red mud and activated alumina, whereas Langmuir and D-R isotherm was best supportive for rice husk ash and clarified sludge respectively. The thermodynamics study successfully revealed the spontaneity, randomness and endothermic / exothermic nature of the adsorption process for each adsorbent. The adsorption experiments were also performed with the real industrial wastewater collected from a coke oven plant. The innovative ANN modelling using two popular algorithms viz., Levenberg-Marquardt and Scaled Conjugate Gradient was studied which established that the experimental and predictive data were within the allowable range. The scaleup designs and the safe disposal of used adsorbents were studied for examination of their commercial applications. The regeneration of the adsorbents were studied using distilled water and ethanol solution separately to find out their regeneration efficiency. The research finally reveals that all the adsorbents are effective for phenol removal to a large extent and thus can generate substantial circular economy.


Ashanendu Mandal done his M.Tech in Chemical Engineering, Indian Institute of Technology, Kharagpur ,MBA in Finance, Indira Gandhi National Open University, New Delhi and Pursuing Doctorate in Chemical Engineering at University of Calcutta, India. he is being trained in Petroleum Production Engineering, Indian School of Mines, Dhanbad Offshore Maintenance, IHRDC, Houston, USA and Calgary, Canada, Contract management, Indian Institute of Management (IIM), Calcutta, Personal Survival and Survival Craft, LBS Nautical and Engineering College, Mumbai, Environmental Clearance Procedure for Oil & Gas, Institute of Petroleum Safety, Health & Environment Management, Goa, Pipeline Corrosion, NACE International, India section, Mumbai, Well Productivity Model, Institute of Oil & Gas Production Technology, Mumbai,Advanced Environmental Management Systems Auditing, Det Norske Veritas (DNV), India section, Stimulation Technology & Specialized Production Services, Institute of Management Development, Dehradun, Petroleum Pacific International, Conference Connections, Singapore, BPR, Benchmarking & ERP Implementation, Xavier Institute of Management, Bhubaneswar, Advanced Management Programme, Indian Institute of Management (IIM), Calcutta.