{"id":5163,"date":"2026-05-20T07:29:37","date_gmt":"2026-05-20T07:29:37","guid":{"rendered":"https:\/\/cognitionconferences.com\/greentechnology\/?post_type=speaker&#038;p=5163"},"modified":"2026-05-20T07:29:41","modified_gmt":"2026-05-20T07:29:41","slug":"ashanendu-mandal","status":"publish","type":"speaker","link":"https:\/\/cognitionconferences.com\/greentechnology\/speaker\/ashanendu-mandal\/","title":{"rendered":"Ashanendu Mandal"},"content":{"rendered":"<p><strong>Abstract<\/strong><\/p>\n<p>This research aims for adsorptive<\/p>\n<p>removal of phenol from wastewater by solid waste materials viz. guava tree bark, rice husk, neem leaves, activated carbon from coconut coir, rice husk ash, red mud, clarified sludge from basic oxygen furnace and activated alumina. The characterizations of the adsorbents are performed by SEM, XRD, FTIR and BET analyzers. The experiments of phenol removal are carried out in batch process 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\u00b0C) and contact time (30-600 min). The maximum phenol removal percentage was found with neem leaves used as adsorbent and it was 97.50%. The kinetics study shows that the pseudo-second order model is best fitted for all adsorbents except red mud. The kinetic modeling shows that the adsorption mechanism is supportive of film diffusion, intra-particle diffusion and chemisorption for all adsorbents. The isotherm analysis suggests that Freundlich isotherm model is best supportive for guava tree bark, rice husk, neem leaves, activated carbon, red mud and activated alumina, whereas Langmuir and D-R isotherm are best supportive for rice husk ash and clarified sludge respectively. The thermodynamics shows the spontaneity, randomness and endothermic\/exothermic nature of the adsorption processes. The ANN modelings using Levenberg-Marquardt and Scaled Conjugate Gradient algorithms establish that the experimental and predictive data are within allowable range. The studies of scale-up designs, the regeneration of adsorbents and the safe disposal of used adsorbents show that these adsorbents can be used for commercial applications. Further, the column study of phenol removal is also carried out using the most efficient batch adsorbent neem leaves. The research concludes that all these adsorbents can be used commercially for removal of toxic phenol from wastewater to ensure water recycling in industry. Further the prospective applications of used adsorbents in brick manufacturing can attract circular economy.<\/p>\n","protected":false},"featured_media":5165,"template":"","meta":{"_acf_changed":false},"schedule":[],"speaker-category":[],"class_list":["post-5163","speaker","type-speaker","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ashanendu Mandal | University of Calcutta | India<\/title>\n<meta name=\"description\" content=\"Dr. Ashanendu Mandal is a distinguished chemical engineer, energy professional, and researcher with over 34 years of experience at Oil and Natural Gas Corporation (ONGC), India\u2019s premier national oil company. He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. He has also acquired MBA in Finance from IGNOU New Delhi and Advanced Management Program from Indian Institute of Management Calcutta.Throughout his career, Dr. Mandal has worked extensively in offshore and onshore oil &amp; gas operations, enhanced oil recovery (EOR), reservoir pressure maintenance, petroleum marketing, offshore safety, asset integrity management, and environmental sustainability. He has held several key technical and managerial roles within ONGC and received multiple merit awards and CMD group awards for his contributions.Dr. Mandal is also widely recognized for his research on wastewater treatment and circular economy approaches, particularly in the adsorptive removal of toxic phenol using low-cost biological and industrial waste materials. He has authored numerous international journal publications and delivered invited talks at major global conferences across Asia, Europe, Australia, the Middle East, South Africa and North America.In addition to his industrial achievements, he has actively collaborated with leading academic institutions, served as session chair and panel moderator at international conferences, and contributed significantly to knowledge dissemination in the fields of petroleum engineering, chemical engineering, environmental management, and sustainable energy technologies. He is also a life member of Indian Chemical Society and Indian Science Congress.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cognitionconferences.com\/greentechnology\/speaker\/ashanendu-mandal\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ashanendu Mandal | University of Calcutta | India\" \/>\n<meta property=\"og:description\" content=\"Dr. Ashanendu Mandal is a distinguished chemical engineer, energy professional, and researcher with over 34 years of experience at Oil and Natural Gas Corporation (ONGC), India\u2019s premier national oil company. He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. He has also acquired MBA in Finance from IGNOU New Delhi and Advanced Management Program from Indian Institute of Management Calcutta.Throughout his career, Dr. Mandal has worked extensively in offshore and onshore oil &amp; gas operations, enhanced oil recovery (EOR), reservoir pressure maintenance, petroleum marketing, offshore safety, asset integrity management, and environmental sustainability. He has held several key technical and managerial roles within ONGC and received multiple merit awards and CMD group awards for his contributions.Dr. Mandal is also widely recognized for his research on wastewater treatment and circular economy approaches, particularly in the adsorptive removal of toxic phenol using low-cost biological and industrial waste materials. He has authored numerous international journal publications and delivered invited talks at major global conferences across Asia, Europe, Australia, the Middle East, South Africa and North America.In addition to his industrial achievements, he has actively collaborated with leading academic institutions, served as session chair and panel moderator at international conferences, and contributed significantly to knowledge dissemination in the fields of petroleum engineering, chemical engineering, environmental management, and sustainable energy technologies. He is also a life member of Indian Chemical Society and Indian Science Congress.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cognitionconferences.com\/greentechnology\/speaker\/ashanendu-mandal\/\" \/>\n<meta property=\"og:site_name\" content=\"Cognition Conferences\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-20T07:29:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cognitionconferences.com\/greentechnology\/wp-content\/uploads\/2026\/05\/india.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"378\" \/>\n\t<meta property=\"og:image:height\" content=\"382\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/speaker\\\/ashanendu-mandal\\\/\",\"url\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/speaker\\\/ashanendu-mandal\\\/\",\"name\":\"Ashanendu Mandal | University of Calcutta | India\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/speaker\\\/ashanendu-mandal\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/speaker\\\/ashanendu-mandal\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cognitionconferences.com\\\/greentechnology\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/india.jpg\",\"datePublished\":\"2026-05-20T07:29:37+00:00\",\"dateModified\":\"2026-05-20T07:29:41+00:00\",\"description\":\"Dr. Ashanendu Mandal is a distinguished chemical engineer, energy professional, and researcher with over 34 years of experience at Oil and Natural Gas Corporation (ONGC), India\u2019s premier national oil company. He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. He has also acquired MBA in Finance from IGNOU New Delhi and Advanced Management Program from Indian Institute of Management Calcutta.Throughout his career, Dr. Mandal has worked extensively in offshore and onshore oil & gas operations, enhanced oil recovery (EOR), reservoir pressure maintenance, petroleum marketing, offshore safety, asset integrity management, and environmental sustainability. He has held several key technical and managerial roles within ONGC and received multiple merit awards and CMD group awards for his contributions.Dr. Mandal is also widely recognized for his research on wastewater treatment and circular economy approaches, particularly in the adsorptive removal of toxic phenol using low-cost biological and industrial waste materials. He has authored numerous international journal publications and delivered invited talks at major global conferences across Asia, Europe, Australia, the Middle East, South Africa and North America.In addition to his industrial achievements, he has actively collaborated with leading academic institutions, served as session chair and panel moderator at international conferences, and contributed significantly to knowledge dissemination in the fields of petroleum engineering, chemical engineering, environmental management, and sustainable energy technologies. 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He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. He has also acquired MBA in Finance from IGNOU New Delhi and Advanced Management Program from Indian Institute of Management Calcutta.Throughout his career, Dr. Mandal has worked extensively in offshore and onshore oil & gas operations, enhanced oil recovery (EOR), reservoir pressure maintenance, petroleum marketing, offshore safety, asset integrity management, and environmental sustainability. He has held several key technical and managerial roles within ONGC and received multiple merit awards and CMD group awards for his contributions.Dr. Mandal is also widely recognized for his research on wastewater treatment and circular economy approaches, particularly in the adsorptive removal of toxic phenol using low-cost biological and industrial waste materials. He has authored numerous international journal publications and delivered invited talks at major global conferences across Asia, Europe, Australia, the Middle East, South Africa and North America.In addition to his industrial achievements, he has actively collaborated with leading academic institutions, served as session chair and panel moderator at international conferences, and contributed significantly to knowledge dissemination in the fields of petroleum engineering, chemical engineering, environmental management, and sustainable energy technologies. He is also a life member of Indian Chemical Society and Indian Science Congress.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/cognitionconferences.com\/greentechnology\/speaker\/ashanendu-mandal\/","og_locale":"en_US","og_type":"article","og_title":"Ashanendu Mandal | University of Calcutta | India","og_description":"Dr. Ashanendu Mandal is a distinguished chemical engineer, energy professional, and researcher with over 34 years of experience at Oil and Natural Gas Corporation (ONGC), India\u2019s premier national oil company. He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. 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He holds a Ph.D. in Chemical Engineering from the University of Calcutta and an M.Tech from Indian Institute of Technology Kharagpur. He has also acquired MBA in Finance from IGNOU New Delhi and Advanced Management Program from Indian Institute of Management Calcutta.Throughout his career, Dr. Mandal has worked extensively in offshore and onshore oil & gas operations, enhanced oil recovery (EOR), reservoir pressure maintenance, petroleum marketing, offshore safety, asset integrity management, and environmental sustainability. He has held several key technical and managerial roles within ONGC and received multiple merit awards and CMD group awards for his contributions.Dr. Mandal is also widely recognized for his research on wastewater treatment and circular economy approaches, particularly in the adsorptive removal of toxic phenol using low-cost biological and industrial waste materials. 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