PUBLICATIONS

I. Journal (published/communicated)

1. Verma, A.; Murugan, PA; Hariharan, VC; Singh, A., “Identification and Genome Analysis of an Arsenic-Resistant Strain of Citrobacter youngae IITK SM2 in Middle Indo-Gangetic Plain Groundwater ” (Biomed Res. Inter., 2022).

2. Verma, A.; Sharma, L.M.; Pahuja; Nilling, J.J.; G.; Kumar, A.; Singh, A.; “Modified Biosand Filter for Provisioning of Potable Water to Rural Households Affected by Chronic Arsenic Pollution in Groundwater” (Env. Engg. Sci. 38(11), pp-1036-1051, 2021) 

3. Nilling, J.J.; Verma, A.; Singh, A., “Potential solubility controls on arsenic speciation in groundwater: evidence from field study and geochemical analysis” (Accepted, Geochimic. Cosmochim. Acta)

II. Conference Proceedings (International)

1. Verma, A.*; Matheshwaran, S; Singh, A.; “Potential Role of Indigenous Bacteria in Controlling Arsenic Concentration in Mixed‑Oxic State Groundwater”, Goldschmidt International Geochemistry Conference, Lyon, France, 1(11cP1): 13854, (2023; Poster Presentation)

2. Verma, A.*; Mohapatra, A.K..; Matheshwaran, S; Singh, A.; “Biogeochemical Processes Governing Arsenic Release in Shallow Mixed-Oxic Groundwater”, Goldschmidt International Geochemistry Conference, Virtual meeting, 1(13gT1): 12801, (2022; Oral presentation) 

3. Verma, A.; Hariharan, V.C.; Matheshwaran, S; Singh, A.; “Arsenate Reduction and Mobilization from Inorganic Arsenic Source by a Novel Bacterial Strain Isolated from Arsenic Polluted Groundwater”, Association of Environmental Engineering and Science Professors, Washington University in St. Louis, 863, (2022, Abstract accepted)

4. Verma, A.; Murugan, P; Matheshwaran, S; Singh, A.; “Potential Role of a Novel Strain of Citrobacter sp. in Controlling Arsenic Speciation in Groundwater ”, Goldschmidt International Geochemistry Conference, Virtual meeting, 1(11d):3214, (2021; Oral presentation)

5. Verma, A.; Murugan, P; Matheshwaran, S; Singh, A.; “Role of Arsenic-Resistant Bacteria in Controlling Arsenic Concentrations in groundwater”, ACS, https://doi.org/10.1021 /scimeetings.0c00437, Virtual (Fall Aug, 2020; Oral presentation)

6. Verma, A.; Pahuja, G; Kumar, A; Nilling, J.J.; Matheshwaran, S; Singh, A.; “Understanding the (Bio)geochemistry of an Arsenic-Contaminated Aquifer for Sustainable Remediation”, Geoenvironment, 1(1), 142-147, New Delhi, India (Feb 2020; Oral presentation).

7. Verma, A.;Nilling, J.J.; Singh, A.; “As(V) Reduction to As(III) in the Presence of Chloride in Ambient Conditions”, Goldschmidt International Geochemistry Conference, 1 (12e), 484, Barcelona, Spain (Aug 2019; oral and poster presentation).

8. Nilling, J.J.; Verma, A.; Singh, A.; “Potential Solubility and Sorption Controls on Arsenic in the Presence of Elevated Dissolved Iron”, Goldschmidt International Geochemistry Conference, 1 (12e), 485, Barcelona, Spain (Aug 2019; Oral presentation)

9. Nilling, J.J.; Verma, A.; Singh, A.; “Geochemical Analysis of Arsenic Speciation in Groundwaters”, International Groundwater Conference, New Delhi, India (Dec, 2017; Poster presentation). 

III. Conference Proceedings (National)

1. Verma, A.*; Nilling, J.J.; Hariharan, V.C.; Matheshwaran, S; Singh, A.; “Potential Role of Chloride in Controlling Arsenic Speciation under Ambient Conditions”, Science for Society Environment and Sustainability, CSIR-NEIST, Jorhat, India, 1 (OP11):35, (2022; Oral presentation).

2. Nilling, J.J.*; Verma, A.; Singh, A.; “Assessment of Precipitation as Arsenic Immobilization Technique in a Typical Oxidizing Groundwater”, Science for Society Environment and Sustainability, CSIR-NEIST, Jorhat, India, 1 (OP04):24, (2022; Oral presentation).

3. Verma, A.*; Nilling, J.J.; Singh, A.; “Kinetics of precipitation of thermodynamically dominant arsenate Solid pharmacolite”, National Environmental Conference, IIT Bombay, India (Feb 2019; Poster presentation).

4. Nilling, J.J.*; Verma, A.; Singh, A.; “Geochemical analysis of arsenic contaminated groundwater of Baikunthpur (Uttar Pradesh), India”, National Environmental Conference, IIT Bombay, India (Feb, 2019; Oral presentation).

5. Nilling, J.J.*; Verma, A.; Singh, A.; “Geochemical analysis of arsenic speciation in groundwater”, In-house Symposium, IIT Kanpur, (Jan 2018; Poster Presentation).

IV. Other Technical Presentations

1. Verma, A*; “Role of indigenous bacteria in controlling arsenic concentrations in mixed‑oxic state groundwater”, Short talk on microbial research assessment, Virtual meeting, (2023, Oral presentation).

2. Verma, A; “Investigation of the biogeochemical processes governing arsenic release in groundwater”, PMRF symposium, Virtual meeting, (2021, Poster presentation).

3. Verma, A.; Pahuja, G; Kumar, A; Pahuja, G; Nilling, J.J.; Mohapatra, A*; Singh, A.; “A Study on Jalkalp filter for Arsenic removal”, Workshop on sharing experiences and technologies on household water treatment and storage Hyderabad, India (Mar 2020; Oral presentation).

RESEARCH EXPERIENCE

I. Ph.D. Dissertation (ongoing)

A. Ph.D. seminar II (Dec 2021) 

Investigation of the (Bio)geochemical Processes Governing Arsenic Release in Groundwaters

• Identification and Genome Analysis of an Arsenic-Metabolizing Strain of Citrobacter youngae IITK SM2 (CyIITKSM2) in Middle Indo-Gangetic Plain Groundwater. Potential role of arsenate-reducing bacteria CyIITKSM2 in controlling arsenic speciation: Extent and kinetics. Comparison of arsenate reduction mediated through different types of ArsC proteins present in the genome of CyIITKSM2 : A mechanistic understanding

B. Ph.D. seminar I (Dec 2020)

Role of Arsenic-Resistant Bacteria in Controlling Arsenic Concentrations in Groundwaters

• Identification and characterization of indigenous As-resistant bacteria from previously identified polluted groundwaters. Investigation of the type and extent of arsenic redox transformation of the strains under laboratory settings. Investigation of the biofilm-forming capacity of these isolates and its role in controlling arsenic speciation in groundwaters

C. State of the art seminar (March 2020)

Investigation of the (Bio)geochemical Processes Governing Arsenic Release in Groundwaters 

• Geochemical analysis from published literatures to identify the possible As-bearing solids from different As-polluted regions in world.

• Different type of As-resistant bacteria, and its mechanism to encounter arsenic toxicity

D. Comprehensive Examination

• Passed on Sep 2019.

• Examiners—Dr. Abhas Singh (CE), Dr. Purnendu Bose (CE), Dr. Abhishek Chaudhary (CE), and Dr. Sarvanan Matheshwaran (BSBE)

II. M.Tech Thesis

A Study on the Precipitation Extent and Kinetics of Select Arsenic-containing Solids 

• Thesis supervisor: Dr. Abhas Singh. https://www.iitk.ac.in/new/abhas-singh 

• Geochemical analysis for selection of possible arsenic solids from data collected from published literatures in As‑affected aquifers, worldwide with special focus on Indian groundwaters

• Performed batch experiments to study kinetics of precipitation of most dominant Ca-As solid, pharmacolite (CaHAsO4·2H2O) as predicted from thermodynamic predictions

III. Relevant Term Papers

• A comparative study on As(V) and As(III) removal using Al- and Fe-oxides (Feb – Apr 2019).

• Use of Physico-chemical Properties of River Water to Study Corrosion in Pipes (Aug – Nov 2016).

• Water Quality Modeling for Soluble Nitrogen and Phosphate in Lake Naivasha, Kenya: An Eutrophication Study (Jan ‑Feb 2017)

IV. B.Tech Projects

• Project Supervisor: Dr. S.V. Deo. http://www.nitrr.ac.in/viewdetails.php?q=ce.svdeo 

• Effect of packing density (PD) and water film thickness (WFT) on workability & Strength of concrete (July 2015- May 2016; Supervisor: Dr. S.V. Deo)

• Seismic Evaluation of the institute building- NIT Raipur, India. (May - June 2014)