Aok Garg

@nith.ac.in

Associate Professor, Department of Chemical Engineering
National Instiute of Technology Hamirpur

Aok Garg


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https://researchid.co/ag191182
Dr. Alok Garg is an accomplished academician and researcher, currently holding the position of Associate Professor in the Chemical Engineering Department at the National Institute of Technology Hamirpur, India. He earned his Bachelor’s degree from Guru Ghasidas Vishwavidyalaya, Bilaspur in 2005, followed by a Master's and Ph.D. in Chemical Engineering from Thapar University, Patiala, India, in 2012 and 2017, respectively. With over 16 years of combined teaching and research experience at Thapar University, Patiala, and NIT Hamirpur, Dr. Garg has established himself as a leading expert in the field. His research focus lies in wastewater treatment, photocatalysis, and anti-cancer activity, specializing in modeling and optimization using Artificial Neural Network and Response Surface Methodology. Dr. Garg's contributions extend beyond the classroom, with a prolific publication record that includes numerous research articles in reputable journals and conference proceedings. He is also the

EDUCATION

• Ph.D. (Chemical Engineering) [2017] (Title: Modeling and Optimization of Degradation of Dyes Present in Textile Waste Water using Supported Photocatalyst), Thapar Institute of Engineering & Technology (formerly known as Thapar University), Patiala, (India)
• M.Tech (Chemical Engineering) [2012], Thapar Institute of Engineering & Technology (formerly known as Thapar University), Patiala, (India). (CGPA: 7.9/10)
• B. E. (Chemical Engineering) [2005] Institute of Technology, Guru Ghasidas Vishwavidyala (formerly known as Guru Ghasidas University) Bilaspur (India). (Marks: 73.13%)

RESEARCH, TEACHING, or OTHER INTERESTS

Water Science and Technology, Chemical Engineering, Catalysis, Process Chemistry and Technology
21

Scopus Publications

458

Scholar Citations

10

Scholar h-index

11

Scholar i10-index

Scopus Publications

  • Insights on the material, adsorptivity, reusability and phytotoxicity of Grewia Optiva amorphous nanocellulose and its magnetite composite for pharmaceuticals removal
    Priya Chaudhary, Arunima Nayak, Brij Bhushan, Shreya Kotnala, Alok Garg, Krishna Kumar Yadav, Tawfik Saleh
    Environmental Science and Pollution Research, 2025
  • Removal of ciprofloxacin and amoxicillin from wastewater using photocatalysis and biological treatment methods: A mini review
    Ritu Arya, Alok Garg, Subhajit Majumder
    International Journal of Chemical Reactor Engineering, 2025
    The increased occurrence of antibiotics in wastewater effluents has emerged as a significant environmental and public health issue, as these contaminants contribute to the development of antibiotic resistance and disrupt the balance of natural microbial ecosystems. Traditional wastewater treatment processes frequently prove inadequate in efficiently eliminating these contaminants. The present study reviews photocatalysis and biological treatment methods, as indicated in the literature, as a comprehensive solution for removing antibiotics such as amoxicillin and ciprofloxacin from wastewater, to determine the most successful treatment strategy for our research. Essential strategies include titanium dioxide (TiO2) in the slurry/suspension mode, doped and immobilized for photocatalytic degradation and the employment of microorganisms in biological treatments are highlighted. Focusing on studies in recent years, the study provides a comparative analysis to identify the most effective treatment methods for these antibiotics.
  • Cassia fistula seeds as a natural coagulant for turbidity reduction: efficacy and optimization via central composite design
    Akanksha Thakur, Virender Shivay, Surjit Singh Katoch, Amit Arora, Alok Garg
    Biomass Conversion and Biorefinery, 2025
  • Photocatalytic Degradation of Ofloxacin in Wastewater Using Mg-Ni Co-doped TiO2 Catalyst
    Mitresh Malhotra, Alok Garg, Manish Rawat
    Chemical Engineering and Technology, 2024
    This study focuses on the preparation and characterization of Mg‐Ni co‐doped TiO2 and its application in the degradation of the pharmaceutical ofloxacin (OFX) under solar irradiation. A wet impregnation method was used to prepare Mg‐Ni co‐doped TiO2. Characterization, optimization, and kinetic studies revealed that the doped TiO2 material is effective in degrading OFX, with potential applications in water treatment or environmental remediation processes. Ultraviolet diffuse reflectance spectroscopy indicated that the band gap of TiO2 was reduced due to doping with Mg and Ni. A reduced band gap can enhance the material's photocatalytic properties, which is important for its application in solar‐driven degradation processes. The catalyst dose and OFX concentration for the degradation process were optimized. A catalyst dose of 2 g L−1 and an OFX solution with a concentration of 40 ppm, maintained at pH 5, resulted in the highest degradation efficiency. The degradation process followed first‐order kinetics, suggesting that the rate of degradation increased with increasing doping.
  • Circular Economy and Solid Waste
    Darshan Salunke, Pratibha Gautam, Alok Garg
    Solid Waste Treatment Technologies Challenges and Perspectives, 2024
    Waste is only waste if it's not looked into again! Solid waste generation has been increasing day by day as lifestyle variations and upgradation are spreading worldwide. With the increase in the rate of waste generation, the environment, economy, and community health all are deteriorating; all these three are considered the chief pillars of sustainability and without focusing on managing solid waste, it would be difficult to achieve sustainable development goals (SDGs). While working on managing solid waste, if the concept of circular economy is also clubbed, then the achievement of SDGs can be fastened. The circular economy focuses on reducing the consumption of resources by focusing on the 10Rs concept that is refuse, rethink, reduce, reuse, repair, refurbish, remanufacture, repurpose, recycle, and recover. This chapter is focused on highlighting the management of solid waste by implementing the concept of circular economy.
  • Synthesis, Characterization, and Biological Activities of Fe- and V-Doped and Co-Doped TiO2
    Alok Garg
    Chemical Engineering and Technology, 2022
    Doping and co‐doping of TiO2 nanoparticles was performed using iron and vanadium by an impregnation method and the as‐synthesized samples were characterized. The redesigned photocatalyst mainly covered the anatase phase in the presence of metal ions in the lattice of the TiO2 photocatalyst. The UV‐vis extinction coefficient and Raman spectroscopy revealed a redshift with an increase in the concentration of metal ions. The synthesized photocatalysts did not change the shape of the nanoparticles. The anticancer and antibacterial activities were checked using doped and co‐doped TiO2 nanoparticles on a lung cancer cell line and E. coli, respectively. The results indicated effective cell inhibition using the co‐doped TiO2 nanoparticles and maximum antibacterial activity in TiO2 doped with ferric ions.
  • Efficient degradation of doxycycline and ofloxacin in an aqueous environment using Fe and Cu doped TiO2-SiO2 photocatalyst under sunlight
    Sonam Rani, Alok Garg, Neetu Singh
    Environmental Engineering Research, 2022
    Several drugs have sparked interest as potential COVID-19 treatment options. Doxycycline (DOX) has been widely used with other potential agents to reduce COVID-19-induced inflammation. DOX and OFLX, both well-known antimicrobial and anti-inflammatory drugs, were chosen as model pollutants. Fe, Cu-codoped TiO2-SiO2 was synthesised as a novel photocatalyst active under sunlight irradiation to treat model pollutants. The synthesised catalyst samples were meticulously characterised using various techniques to evaluate their morphological, optical, and structural properties. The results of BET analysis showed that the TSFC1 sample has a large specific surface area of 288 m2g-1. Maximum degradation of DOX and OFLX (about 98%) was achieved with the TSFC1 catalyst. The photocatalytic reusability was investigated for up to seven successive cycles, and the composite particles maintained their high photodegradation activity for DOX and OFLX. TFSC1 composite, in particular, demonstrated high catalytic activity as well as excellent recovery potential, and its combination with solar light, silica, and dopants can be introduced as a promising strategy for efficiently destroying both DOX and OFLX antibiotics. This study highlights the feasibility of hybridising doped dual semiconductor nanostructures in implementing solar light-powered pharmaceutical wastewater degradation.
  • Highly efficient photo-degradation of cetirizine antihistamine with TiO2-SiO2photocatalyst under ultraviolet irradiation
    Sonam Rani, Alok Garg, Neetu Singh
    International Journal of Chemical Reactor Engineering, 2022
    Photocatalysis is an extraordinary and vastly researched topic; there is a need to find new ways to support producing composite materials that are cost-effective, efficient and have a low environmental impact. The investigation was undertaken on syn TiO2 by depositing it on silica. The results elucidate the positive effect on photocatalysis activity and the macroscopic structure on which the TiO2 is formed. For the analysis of photocatalyst, various characterisation measurements were undertaken, such as XRD, FTIR, DRS, FESEM, TEM, RS, and BET. The accumulated TiO2 onto the surface of SiO2 stabilised its transformation of the phase from anatase to rutile, resulting in decreased particle size and enhancing its photocatalytic activity under UV irradiation. The concentration of OH• radicals was determined using terephthalic acid as a probe molecule to determine its role in the photocatalytic degradation of antihistamine. The results of BET analysis showed that the syn TiO2-SiO2 sample has a large specific surface area of 192.6 m2 g−1. Maximum degradation of cetirizine (about 97%) was achieved with 80% TiO2-20% SiO2 (TS-4). Recyclability test confirmed that 80% TiO2-20% SiO2 sample was stable up to six cycles.
  • Advanced Treatment Technologies for Industrial Wastewater
    Alok Garg, Pratibha Gautamb, Darshan Salunkeb
    Environmental Science and Engineering, 2022
  • Preface
    Environmental Science and Engineering, 2022
  • Photocatalytic degradation and mineralization of amoxicillin and ofloxacin using TiO2-SiO2 composites
    Sonam Rani, Alok Garg, Neetu Singh
    Toxicological and Environmental Chemistry, 2021
  • Abatement of formaldehyde with photocatalytic and catalytic oxidation: A review
    Vipin Soni, Varun Goel, Paramvir Singh, Alok Garg
    International Journal of Chemical Reactor Engineering, 2021
  • Biological Treatment of Pharmaceuticals and Personal Care Products (PPCPs) Before Discharging to Environment
    Monica Simon, Ajay Kumar, Alok Garg, Manisha
    Microorganisms for Sustainability, 2021
  • Optimization methodology based on neural networks and box-behnken design applied to photocatalysis of acid red 114 dye
    Alok Garg, Gaganpreet Kaur, Vikas K. Sangal, Pramod K. Bajpai, Sushant Upadhyay
    Environmental Engineering Research, 2020
  • Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO2 Catalyst under Solar Light
    Alok Garg, Tejasvi Singhania, Ashutosh Singh, Shilpa Sharma, Sonam Rani, Ananya Neogy, Shri Ram Yadav, Vikas Kumar Sangal, Neha Garg
    Scientific Reports, 2019
  • Modeling, Optimization and Kinetic Study for Photocatalytic Treatment of Ornidazole Using Slurry and Fixed-Bed Approach
    Steffi Talwar, Vikas Kumar Sangal, Anoop Verma, Parminder Kaur, Alok Garg
    Arabian Journal for Science and Engineering, 2018
  • Parametric study for the treatment of simulated cetirizine wastewater using electrochemical methods: Optimization and cost analysis
    Shivani Agnihotri, Parminder Kaur, Vikas Kumar Sangal, Alok Garg, Anoop Verma
    Journal of the Electrochemical Society, 2018
  • Photocatalytic Treatment of Binary Mixture of Dyes using UV/TiO2 Process: Calibration, Modeling, Optimization and Mineralization Study
    Alok Garg, Vikas K. Sangal, Pramod K. Bajpai
    International Journal of Chemical Reactor Engineering, 2017
  • Synthesis, characterization and anticancer activities of metal ions Fe and Cu doped and co-doped TiO2
    Alok Garg, Ashutosh Singh, Vikas K. Sangal, Pramod K. Bajpai, Neha Garg
    New Journal of Chemistry, 2017
  • Decolorization and degradation of Reactive Black 5 dye by photocatalysis: modeling, optimization and kinetic study
    Alok Garg, Vikas K. Sangal, Pramod K. Bajpai
    Desalination and Water Treatment, 2016
  • Oxidative degradation of phenol in waste water with the synergetic effect of UV light & H2O2
    Alok Garg, P. K. Bajpai, V K Sangal, Pooja Agrawal
    2011 Defense Science Research Conference and Expo Dsr 2011, 2011

RECENT SCHOLAR PUBLICATIONS

  • Insights on the material, adsorptivity, reusability and phytotoxicity of Grewia Optiva amorphous nanocellulose and its magnetite composite for pharmaceuticals …
    P Chaudhary, A Nayak, B Bhushan, S Kotnala, A Garg, KK Yadav, ...
    Environmental Science and Pollution Research, 1-25 , 2025
    2025
  • Removal of ciprofloxacin and amoxicillin from wastewater using photocatalysis and biological treatment methods: a mini review
    R Arya, A Garg, S Majumder
    International Journal of Chemical Reactor Engineering 23 (7), 755-776 , 2025
    2025
    Citations: 4
  • Cassia fistula seeds as a natural coagulant for turbidity reduction: efficacy and optimization via central composite design
    A Thakur, V Shivay, SS Katoch, A Arora, A Garg
    Biomass Conversion and Biorefinery 15 (7), 10997-11010 , 2025
    2025
    Citations: 1
  • Photocatalytic Degradation of Ofloxacin in Wastewater Using Mg‐Ni Co‐doped TiO2 Catalyst
    M Malhotra, A Garg, M Rawat
    Chemical Engineering & Technology , 2024
    2024
    Citations: 4
  • Synthesis, Characterization, and Biological Activities of Fe‐ and V‐Doped and Co‐Doped TiO 2
    A Garg
    Chemical Engineering & Technology 45 (9), 1538-1544 , 2022
    2022
    Citations: 3
  • Efficient degradation of doxycycline and ofloxacin in an aqueous environment using Fe and Cu doped TiO 2 -SiO 2 photocatalyst under sunlight
    S Rani, A Garg, N Singh
    Environmental Engineering Research 27 (4) , 2022
    2022
    Citations: 22
  • Highly efficient photo-degradation of cetirizine antihistamine with TiO 2 -SiO 2 photocatalyst under ultraviolet irradiation.
    S Rani, A Garg, N Singh
    International Journal of Chemical Reactor Engineering 20 (2) , 2022
    2022
    Citations: 2
  • Advanced industrial wastewater treatment and reclamation of water
    S Roy, A Garg, S Garg, TA Tran
    Springer International Publishing , 2022
    2022
    Citations: 24
  • Advanced Treatment Technologies for Industrial Wastewater
    A Garg, P Gautam, D Salunke
    Advanced Industrial Wastewater Treatment and Reclamation of Water, 25-44 , 2022
    2022
    Citations: 7
  • Photocatalytic degradation and mineralization of amoxicillin and ofloxacin using TiO 2 -SiO 2 composites
    S Rani, A Garg, N Singh
    Toxicological & Environmental Chemistry 103 (2), 137-153 , 2021
    2021
    Citations: 16
  • Abatement of formaldehyde with photocatalytic and catalytic oxidation: A review
    V Soni, V Goel, P Singh, A Garg
    International Journal of Chemical Reactor Engineering 19 (1), 1-29 , 2021
    2021
    Citations: 37
  • Optimization methodology based on neural networks and box-behnken design applied to photocatalysis of acid red 114 dye
    A Garg, G Kaur, VK Sangal, PK Bajpai, S Upadhyay
    Environmental Engineering Research 25 (5), 753-762 , 2020
    2020
    Citations: 23
  • Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO 2 Catalyst under Solar Light
    A Garg, T Singhania, A Singh, S Sharma, S Rani, A Neogy, SR Yadav, ...
    Scientific reports 9 (1), 765 , 2019
    2019
    Citations: 183
  • Modeling, optimization and kinetic study for photocatalytic treatment of ornidazole using slurry and fixed-bed approach
    S Talwar, VK Sangal, A Verma, P Kaur, A Garg
    Arabian Journal for Science and Engineering 43 (11), 6191-6202 , 2018
    2018
    Citations: 16
  • Parametric study for the treatment of simulated cetirizine wastewater using electrochemical methods: Optimization and cost analysis
    S Agnihotri, P Kaur, VK Sangal, A Garg, A Verma
    Journal of the Electrochemical Society 165 (11), E556-E562 , 2018
    2018
    Citations: 16
  • Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO2 catalyst
    T Singhania, AG Garg
    2017
  • Modeling and Optimization of Degradation of Dyes Present in Textile Waste Water using Supported Photocatalyst
    A Garg, PK Bajpai, VK Sangal
    2017
  • Photocatalytic Treatment of Binary Mixture of Dyes using UV/TiO 2 Process: Calibration, Modeling, Optimization and Mineralization Study
    A Garg, VK Sangal, PK Bajpai
    International Journal of Chemical Reactor Engineering 15 (2), 20150220 , 2017
    2017
    Citations: 10
  • Synthesis, characterization and anticancer activities of metal ions Fe and Cu doped and co-doped TiO 2
    A Garg, A Singh, VK Sangal, PK Bajpai, N Garg
    New Journal of Chemistry 41 (18), 9931-9937 , 2017
    2017
    Citations: 52
  • Decolorization and degradation of Reactive Black 5 dye by photocatalysis: modeling, optimization and kinetic study
    A Garg, VK Sangal, PK Bajpai
    Desalination and Water Treatment , 2015
    2015
    Citations: 37

MOST CITED SCHOLAR PUBLICATIONS

  • Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO 2 Catalyst under Solar Light
    A Garg, T Singhania, A Singh, S Sharma, S Rani, A Neogy, SR Yadav, ...
    Scientific reports 9 (1), 765 , 2019
    2019
    Citations: 183
  • Synthesis, characterization and anticancer activities of metal ions Fe and Cu doped and co-doped TiO 2
    A Garg, A Singh, VK Sangal, PK Bajpai, N Garg
    New Journal of Chemistry 41 (18), 9931-9937 , 2017
    2017
    Citations: 52
  • Abatement of formaldehyde with photocatalytic and catalytic oxidation: A review
    V Soni, V Goel, P Singh, A Garg
    International Journal of Chemical Reactor Engineering 19 (1), 1-29 , 2021
    2021
    Citations: 37
  • Decolorization and degradation of Reactive Black 5 dye by photocatalysis: modeling, optimization and kinetic study
    A Garg, VK Sangal, PK Bajpai
    Desalination and Water Treatment , 2015
    2015
    Citations: 37
  • Advanced industrial wastewater treatment and reclamation of water
    S Roy, A Garg, S Garg, TA Tran
    Springer International Publishing , 2022
    2022
    Citations: 24
  • Optimization methodology based on neural networks and box-behnken design applied to photocatalysis of acid red 114 dye
    A Garg, G Kaur, VK Sangal, PK Bajpai, S Upadhyay
    Environmental Engineering Research 25 (5), 753-762 , 2020
    2020
    Citations: 23
  • Efficient degradation of doxycycline and ofloxacin in an aqueous environment using Fe and Cu doped TiO 2 -SiO 2 photocatalyst under sunlight
    S Rani, A Garg, N Singh
    Environmental Engineering Research 27 (4) , 2022
    2022
    Citations: 22
  • Photocatalytic degradation and mineralization of amoxicillin and ofloxacin using TiO 2 -SiO 2 composites
    S Rani, A Garg, N Singh
    Toxicological & Environmental Chemistry 103 (2), 137-153 , 2021
    2021
    Citations: 16
  • Modeling, optimization and kinetic study for photocatalytic treatment of ornidazole using slurry and fixed-bed approach
    S Talwar, VK Sangal, A Verma, P Kaur, A Garg
    Arabian Journal for Science and Engineering 43 (11), 6191-6202 , 2018
    2018
    Citations: 16
  • Parametric study for the treatment of simulated cetirizine wastewater using electrochemical methods: Optimization and cost analysis
    S Agnihotri, P Kaur, VK Sangal, A Garg, A Verma
    Journal of the Electrochemical Society 165 (11), E556-E562 , 2018
    2018
    Citations: 16
  • Photocatalytic Treatment of Binary Mixture of Dyes using UV/TiO 2 Process: Calibration, Modeling, Optimization and Mineralization Study
    A Garg, VK Sangal, PK Bajpai
    International Journal of Chemical Reactor Engineering 15 (2), 20150220 , 2017
    2017
    Citations: 10
  • Advanced Treatment Technologies for Industrial Wastewater
    A Garg, P Gautam, D Salunke
    Advanced Industrial Wastewater Treatment and Reclamation of Water, 25-44 , 2022
    2022
    Citations: 7
  • Removal of ciprofloxacin and amoxicillin from wastewater using photocatalysis and biological treatment methods: a mini review
    R Arya, A Garg, S Majumder
    International Journal of Chemical Reactor Engineering 23 (7), 755-776 , 2025
    2025
    Citations: 4
  • Photocatalytic Degradation of Ofloxacin in Wastewater Using Mg‐Ni Co‐doped TiO2 Catalyst
    M Malhotra, A Garg, M Rawat
    Chemical Engineering & Technology , 2024
    2024
    Citations: 4
  • Synthesis, Characterization, and Biological Activities of Fe‐ and V‐Doped and Co‐Doped TiO 2
    A Garg
    Chemical Engineering & Technology 45 (9), 1538-1544 , 2022
    2022
    Citations: 3
  • Highly efficient photo-degradation of cetirizine antihistamine with TiO 2 -SiO 2 photocatalyst under ultraviolet irradiation.
    S Rani, A Garg, N Singh
    International Journal of Chemical Reactor Engineering 20 (2) , 2022
    2022
    Citations: 2
  • Cassia fistula seeds as a natural coagulant for turbidity reduction: efficacy and optimization via central composite design
    A Thakur, V Shivay, SS Katoch, A Arora, A Garg
    Biomass Conversion and Biorefinery 15 (7), 10997-11010 , 2025
    2025
    Citations: 1
  • Oxidative degradation of phenol in waste water with the synergetic effect of UV light & H 2 O 2
    A Garg, PK Bajpai, VK Sangal, P Agrawal
    2011 Defense Science Research Conference and Expo (DSR), 1-4 , 2011
    2011
    Citations: 1
  • Insights on the material, adsorptivity, reusability and phytotoxicity of Grewia Optiva amorphous nanocellulose and its magnetite composite for pharmaceuticals …
    P Chaudhary, A Nayak, B Bhushan, S Kotnala, A Garg, KK Yadav, ...
    Environmental Science and Pollution Research, 1-25 , 2025
    2025
  • Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO2 catalyst
    T Singhania, AG Garg
    2017

Publications

Research Publication
SCI/SCEI:
1. Alok Garg, (2022) Synthesis, Characterization, and Biological Activities of Fe‐ and V‐Doped and Co‐Doped TiO2, Chemical Engineering & Technology, 45 (9) 1538-1554 (I.F. 1.728)
2. Sonam Rani, Alok Garg, Neetu Singh. (2022) Efficient degradation of doxycycline and ofloxacin in an aqueous environment using Fe and Cu doped TiO2-SiO2 photocatalyst under sunlight, Environmental Engineering Research, 27 (4) 210282 (I.F. 2.507)
3. Sonam Rani, Alok Garg, Neetu Singh (2022) Highly efficient photo-degradation of cetirizine antihistamine with TiO2-SiO2 photocatalyst under ultraviolet irradiation, International Journal of Chemical Reactor Engineering 20 (2) 183-195 (I.F. 1.51)
4. Sonam Rani, Alok Garg, Neetu Singh (2021) Photocatalytic degradation and mineralization of amoxicillin and ofloxacin using TiO2-SiO2 composites, Toxicological & Environmental Chemistry 103 (2) 137-153 (I.F. 3.742)
5. Vipin Soni, Varun Goel, Paramvir Singh, Alok Garg (2021) Abatement of formaldehyde with photocatalytic and catalytic oxidation: A review, International Journal of Chemical Reactor Engineering 19 (1) 1-29 (I.F. 1.51)
6. Alok Garg, Gaganpreet Kaur, Vikas K Sangal, Pramod K Bajpai, Sushant Upadhyay (2020) Optimization methodology based on neural networks and box-behnken design applied to photocatalysis of acid red 114 dye, Environmental Engineering Research, 25 (5) 753-762 (I.F. 2.507)
7. Alok Garg, Tejasvi Singhania, Ashutosh Singh, Shilpa Sharma, Sonam Rani, Shri Ra