... towards excellence in science

An Autonomous Institution, Under the Ministry of Education, Government of India

Gopala Krishna Darbha

Associate Professor
Dept: Earth Sciences (DES)
E-mail: gkdarbha [at]
Personal homepage: Click Here

Research Interest:

Our work is focused on both the fundamental and as well as applied aspects of environmental science. Our main goal is to address the safety concerns of anthropogenic contaminants under varying hydrogeochemical environments and finding nano-eco-friendly solutions to combat potential contaminants in the environment. 1) To understand the fate and transport of contaminants in the subsurface environment. More specifically, to interpret the mechanisms responsible for retention of colloids/nanoparticles in the porous (soil) environment and at rock and mineral surfaces. As part of the work, we also investigate the role of colloids/nanoparticles to transport the contaminants in the riverine and soil environments. Here, the impact of factors such as flow velocity, geochemistry, surface topography, etc. on transport/deposition will be elucidated. We consider the nanoparticles such as nanopesticides, nanoplastics, nano metal oxides for the study. 2)Application of eco-friendly nanoparticles for the remediation of metal contaminants in the environment. Modified nanocomposites such as bio-char, hydroxyapatite, clay-based products are synthesized and applied for the remediation purpose. 3)Factors contributing to accumulation of contaminants (metals, dyes, persistent organic pollutants, PAHs, PCBs) in the riverbed and sediments4)Impact of pollution on groundwater hydrogeochemistry5)Finding the human exposure pathways to contaminants (metals, plastics, pesticides, perfluoroalkyl compounds etc) through food, water and air.Interested candidates to work in our lab may write to my email address along with their CV.

Academic Background:

  1. Ph.D. (Environmental Nanoscience), USA (Jackson State University), 2008


  1. Associate Professor, IISER Kolkata (current)
  2. Assistant Professor, IISER Kolkata (2017 - 2021)
  3. Senior postdoc, Karlsruhe Institute of Technology, Germany (2011 - 2016)
  4. Postdoc, University of Gottingen, Germany (2008 - 2011)
  5. Postdoc, Lehigh University, Pennsylvania, U.S.A. (2008 - 2008)

Awards and Honors:

  1. NSSWM-2019 Excellent paper presentation award from National symposium on sustainable waste management (2019)
  2. Early Career Research Award from Science and Engineering Research Board (2017)
  3. Ramanujan Fellowship from SERB, Department of Science and Technology (2016)
  4. Best graduate student Ph.D. from Jackson State University, U.S.A. (2008)
  5. 2nd prize in graduate student presentation from 8th SSCCM Conference (2008)
  6. 2nd prize in graduate student presentation from 7th SSCCM Conference (2007)
  7. Qualified Graduate Aptitude Test in Engineering with 98.6 percentile from AICTE (2003)
  8. Sri N.Sri Ramabhadra Raju memorial prize (Gold medal) for standing top among all B.S. students from D.N.R. College, Andhra University (2000)
  9. Sri N.Bangar Raju memorial prize for standing first among all the B.S. Physics students from D.N.R. College, Andhra University (2000)
  10. Sri A.B.R.B.Kasi Viswanadha Raju memorial prize for standing first among all the B.S. Chemistry from D.N.R. College, Andhra University (2000)

Selected Publications:

  1. Singh, Nisha; Khandelwal, Nitin; Ganie, Zahid; Tiwari, Ekta and Darbha, Gopala Krishna. 2021."Eco-friendly magnetic biochar: an effective trap for nanoplastics of varying surface functionality and size in the aqueous environment." Chemical Engineering Journal, 418, 129405
  2. Khandelwal, Nitin; Tiwari, Ekta; Singh, Nisha and Darbha, Gopala Krishna. 2021."Heterogeneously porous multi-adsorbent Clay (C)-Biochar (BC) surface to support redox-sensitive nanoparticles: applications of novel C-BC-nZVI nanotrident in continuous water filtration." Environmental Science and Technology Water, 1, 641-652
  3. Monikh, Fazel Abdolahpur; Chupani, Latifeh; Lao, Daniel Arenas; Guo, Zhiling; Zhang, Peng; Darbha, Gopala Krishna; Valsami-Jones, Eugenia; Lynch, Iseult; Vijver, Martina G.; Bodegom, Peter M.van and Peijnenburg, Willie J.G.M.. 2021." Particle number-based trophic transfer of gold nanomaterials in an aquatic food chain." Nature Communications, 12, 899
  4. Singh, Nisha; Khandelwal, Nitin; Tiwari, Ekta; Sarkar, Nabnita; Lahiri, Susanta; Luetzenkirchen, Johannes and Darbha, Gopala Krishna. 2021."Interaction of metal oxide nanoparticles with microplastics: impact of weathering under riverine conditions." Water Research , 189, 116622
  5. Singh, Nisha; Mondal, Arijit; Bagri, Amerjeet; Tiwari, Ekta; Khandelwal, Nitin; Monikh, Fazel Abdolahpur and Darbha, Gopala Krishna. 2021."Characteristics and spatial distribution of microplastics in the lower Ganga River water and sediment." Marine Pollution Bulletin, 163, 111960

All Publications: Click Here