Multidisciplinary, Process Chemistry and Technology, Ceramics and Composites, Renewable Energy, Sustainability and the Environment
FUTURE PROJECTS
Permeable cement composites for water purification
Cement based eco-materials from waste materials
Applications Invited Collaboration
Preparation of energy efficient LC3 type cement using low quality limestone deposits using;
Magnesium Silicate Hydrate based composites materials and applications
Applications Invited Collaboration
Biomass conversion (thermo-chemical and enzymatic) into biofuels and biochemicals using (nano)catalysts
Plasma-Mediated Transformation Kinetics and Stability of Nitrogen Species in Tea Factory Waste R. Newar, R. Paul, N. Das, N. Saikia, S. S. Kausik IEEE Transactions on Plasma Science, 2026 As India’s largest tea-producing region, Assam generates enormous amounts of tea factory waste (TFW), creating significant environmental and waste management challenges due to its high organic and nutrient content. Conventional disposal methods often fail to address pollution risks or recover valuable resources from this abundant agro-industrial by-product. The present study investigates how nonthermal plasma (NTP) processing affects the physiological characteristics and nitrogen compounds in TFW, focusing specifically on the breakdown and build-up of nitrate (<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$N\!O_{3}^{-}$</tex-math> </inline-formula>) and ammonium (<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$N\!H_{4}^{+}$</tex-math> </inline-formula>), along with the stability of reactive ions. Over time, observations revealed that the formation of nitrate aligns with pseudo-first-order kinetics, with the formation rate highly contingent on the plasma treatment duration. Plasma treatment of 30 min resulted in the quickest formation, aligning with moderate acidification and controlled ammonium build-up. In contrast, shorter treatment times led to substantial increases, attributed to the reductive conditions and an initial low pH. This study integrates plasma science with waste valorization to facilitate nutrient recovery and sustainable waste management, while reducing environmental risks and advancing circular economy approaches.
Use of industrial waste and municipality solid waste as aggregate, filler or fiber in cement mortar and concrete Advances in Materials Science Research, 2011
Strength development, durability, and micromineralogical analysis of cement mortar samples containing fly-ash from co-firing of wood pellets with lignite 25th Annual International Pittsburgh Coal Conference PCC Proceedings, 2008
Characterization of fly-ash generated during co-firing of lignite and biomass for use as mineral admixture with ordinary portland cement 25th Annual International Pittsburgh Coal Conference PCC Proceedings, 2008
Oil field sludge used to make brick American Ceramic Society Bulletin, 2000
RECENT SCHOLAR PUBLICATIONS
Plasma-Mediated Transformation Kinetics and Stability of Nitrogen Species in Tea Factory Waste Newar R., Paul R., Das N., Saikia N., Kausik S. S. IEEE Transactions on Plasma Science , 2026 2026
Modulating Thermokinetic and Thermodynamic Insights into the Pyrolysis of Two Wetland Weed-based Biomass via Acetic Acid Pretreatment D Sarmah, D Kalita, N Bhuyan, S Gogoi, BK Saikia, N Saikia Chemical Thermodynamics and Thermal Analysis, 100318 , 2026 2026
Thermochemical conversion of organic-fraction of municipal solid waste for bioenergy: Multicomponent kinetic modelling via Fraser-Suzuki deconvolution in a circular economy context M Athparia, N Saikia, R Kataki Fuel 405, 136484 , 2026 2026 Citations: 4
Design optimization and development of multilayer X-band microwave absorber based on Fe3O4-expanded graphite reinforced cement composites BB Saikia, JP Gogoi, N Saikia, PK Mochahari Materials Science and Engineering: B 323, 118832 , 2026 2026
Synthesis and development of Fe 3 O 4 -expanded graphite embedded cement nanocomposites as excellent X-band microwave absorber BB Saikia, N Saikia, JP Gogoi, PK Mochahari Journal of Materials Science: Materials in Electronics 36 (12), 739 , 2025 2025 Citations: 4
Kinetic analysis and pyrolysis behavior of organic fraction of municipal solid waste towards the production of renewable fuel: A sustainable approach to resource recovery for … M Athparia, N Saikia, A Namdeo, A Garg, PK Sarangi, R Kataki Sustainable Chemistry and Pharmacy 42, 101822 , 2024 2024 Citations: 10
Effect of Co and Ni impregnated ZSM-5 catalyst on pyrolysis products of Tithonia diversifolia: Kinetic study and thermodynamics N Bhuyan, N Bora, K Boruah, ND Choudhury, N Saikia, R Kataki Process Safety and Environmental Protection 185, 807-816 , 2024 2024 Citations: 12
A comprehensive study on the transition metal–catalysed pyrolysis kinetics, thermodynamics and mechanisms of bamboo powder HP Nath, BK Dutta, N Bhuyan, BK Saikia, N Saikia Biomass Conversion and Biorefinery 13 (6), 5043-5057 , 2023 2023 Citations: 9
Assessment of kinetic parameters, mechanisms and thermodynamics of Tithonia diversifolia pyrolysis N Bhuyan, ND Choudhury, BK Dutta, K Upadhyaya, N Saikia, R Kataki Biomass Conversion and Biorefinery 13 (4), 2703-2718 , 2023 2023 Citations: 16
Synthesis and applications of magnetic nanoparticles in the ultrasound assisted oxidative degradation of methylene blue PM Bhuyan, J Phukon, BK Saikia, N Saikia IIChE-CHEMCON , 2022 2022
Evaluation of the effect of high sulfur subbituminous coal on the devolatilization of biomass residue by using model free, model fitting and combined kinetic methods HP Nath, BK Dutta, D Kalita, BK Saikia, N Saikia Fuel 310, 122235 , 2022 2022 Citations: 18
Production of bio-oil from coir pith via pyrolysis: kinetics, thermodynamics, and optimization using response surface methodology ND Choudhury, N Bhuyan, N Bordoloi, N Saikia, R Kataki Biomass Conversion and Biorefinery 11 (6), 2881-2898 , 2021 2021 Citations: 27
Removal of methylene blue from water using okra (Abelmoschus esculentus L.) mucilage modified biochar H Nath, A Saikia, PJ Goutam, BK Saikia, N Saikia Bioresource Technology Reports 14, 100689 , 2021 2021 Citations: 73
Effect of biomass addition on the devolatilization kinetics, mechanisms and thermodynamics of a northeast Indian low rank sub-bituminous coal K Konwar, HP Nath, N Bhuyan, BK Saikia, RC Borah, AC Kalita, N Saikia Fuel 256, 115926 , 2019 2019 Citations: 64
Assessments of pyrolysis kinetics and mechanisms of biomass residues using thermogravimetry M Gogoi, K Konwar, N Bhuyan, RC Borah, AC Kalita, HP Nath, N Saikia Bioresource Technology Reports 4, 40-49 , 2018 2018 Citations: 109
Effects of biomass types on the co-pyrolysis behaviour of a sub-bituminous high-sulphur coal M Saikia, AA Ali, RC Borah, MS Bezbarua, BK Saikia, N Saikia Energy, Ecology & Environment 3 (5), 251-265 , 2018 2018 Citations: 14
pH dependent leachings of some trace metals and metalloid species from lead smelter slag and their fate in natural geochemical environment N Saikia, RR Borah, K Konwar, C Vandecastelee Groundwater for Sustainable Development 7, 348-358 , 2018 2018 Citations: 47
Recycling of industrial and municipal solid wastes in cement-based applications N Saikia Advances in Waste Management: Select Proceedings of Recycle 2016, 17-30 , 2018 2018 Citations: 2
Use of a plant based polymeric material as a low cost chemical admixture in cement mortar and concrete preparations A Hazarika, I Hazarika, M Gogoi, SS Bora, RR Borah, PJ Goutam, ... Journal of Building Engineering 15, 194-202 , 2018 2018 Citations: 70
The effect of a plant based polymeric material on the fresh and hardened states properties of cement mortar A Hazarika, I Hazarika, N Saikia 1st International Conference on Civil Engineering for Sustainable … , 2016 2016 Citations: 10
MOST CITED SCHOLAR PUBLICATIONS
Use of plastic waste as aggregate in cement mortar and concrete preparation: A review N Saikia, J De Brito Construction and Building Materials 34, 385-401 , 2012 2012 Citations: 985
Mechanical properties and abrasion behaviour of concrete containing shredded PET bottle waste as a partial substitution of natural aggregate N Saikia, J De Brito Construction and building materials 52, 236-244 , 2014 2014 Citations: 720
Recycled aggregate in concrete: use of industrial, construction and demolition waste J De Brito, N Saikia Springer Science & Business Media , 2012 2012 Citations: 555
Influence of curing conditions on the mechanical performance of concrete containing recycled plastic aggregate L Ferreira, J De Brito, N Saikia Construction and Building Materials 36, 196-204 , 2012 2012 Citations: 321
Characterization, beneficiation and utilization of a kaolinite clay from Assam, India NJ Saikia, DJ Bharali, P Sengupta, D Bordoloi, RL Goswamee, PC Saikia, ... Applied clay science 24 (1-2), 93-103 , 2003 2003 Citations: 304
Waste polyethylene terephthalate as an aggregate in concrete N Saikia, J Brito Materials Research 16 (2), 341-350 , 2013 2013 Citations: 301
Influence of curing conditions on the durability-related performance of concrete made with selected plastic waste aggregates RV Silva, J de Brito, N Saikia Cement and Concrete Composites 35 (1), 23-31 , 2013 2013 Citations: 298
Production of cement clinkers from municipal solid waste incineration (MSWI) fly ash N Saikia, S Kato, T Kojima Waste Management 27 (9), 1178-1189 , 2007 2007 Citations: 277
Pre-treatment of municipal solid waste incineration (MSWI) bottom ash for utilisation in cement mortar N Saikia, G Mertens, K Van Balen, J Elsen, T Van Gerven, ... Construction and Building Materials 96, 76-85 , 2015 2015 Citations: 186
Assessment of Pb-slag, MSWI bottom ash and boiler and fly ash for using as a fine aggregate in cement mortar N Saikia, G Cornelis, G Mertens, J Elsen, K Van Balen, T Van Gerven, ... Journal of Hazardous materials 154 (1-3), 766-777 , 2008 2008 Citations: 179
Thermogravimetric investigation on the chloride binding behaviour of MK–lime paste N Saikia, S Kato, T Kojima Thermochimica Acta 444 (1), 16-25 , 2006 2006 Citations: 119
Assessments of pyrolysis kinetics and mechanisms of biomass residues using thermogravimetry M Gogoi, K Konwar, N Bhuyan, RC Borah, AC Kalita, HP Nath, N Saikia Bioresource Technology Reports 4, 40-49 , 2018 2018 Citations: 109
Compositions and leaching behaviours of combustion residues N Saikia, S Kato, T Kojima Fuel 85 (2), 264-271 , 2006 2006 Citations: 104
Bricks from petroleum effluent treatment plant sludge: properties and environmental characteristics P Sengupta, N Saikia, PC Borthakur Journal of Environmental Engineering 128 (11), 1090-1094 , 2002 2002 Citations: 87
Removal of methylene blue from water using okra (Abelmoschus esculentus L.) mucilage modified biochar H Nath, A Saikia, PJ Goutam, BK Saikia, N Saikia Bioresource Technology Reports 14, 100689 , 2021 2021 Citations: 73
Cementitious properties of metakaolin–normal Portland cement mixture in the presence of petroleum effluent treatment plant sludge NJ Saikia, P Sengupta, PK Gogoi, PC Borthakur Cement and Concrete Research 32 (11), 1717-1724 , 2002 2002 Citations: 72
Use of a plant based polymeric material as a low cost chemical admixture in cement mortar and concrete preparations A Hazarika, I Hazarika, M Gogoi, SS Bora, RR Borah, PJ Goutam, ... Journal of Building Engineering 15, 194-202 , 2018 2018 Citations: 70
Kinetics of dehydroxylation of kaolin in presence of oil field effluent treatment plant sludge N Saikia, P Sengupta, PK Gogoi, PC Borthakur Applied clay science 22 (3), 93-102 , 2002 2002 Citations: 66
Effect of biomass addition on the devolatilization kinetics, mechanisms and thermodynamics of a northeast Indian low rank sub-bituminous coal K Konwar, HP Nath, N Bhuyan, BK Saikia, RC Borah, AC Kalita, N Saikia Fuel 256, 115926 , 2019 2019 Citations: 64
Hydration behaviour of lime–co-calcined kaolin–petroleum effluent treatment plant sludge NJ Saikia, P Sengupta, PK Gogoi, PC Borthakur Cement and Concrete Research 32 (2), 297-302 , 2002 2002 Citations: 53
Publications
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