Front Matter -- Fluoride in Groundwater / Bedour Al Sabti, Dhanu Radha Samayamanthula, Fatemah M Dashti, Chidambaram Sabarathinam -- Geochemical Sources, Aqueous Geochemistry, Human Health Risk of Fluoride-Enriched Groundwater, and Its Remedial Measures / Paulami Sahu, Chitrangada Debsarma -- Spatial Distribution of Arsenic Contamination in India / Abhra Singh, Risha Singh, Binod Kumar Nath, Mohammad Hashim, Masood Ahsan Siddiqui, Hasan Raja Naqvi, Lubna Siddiqui -- Arsenic Contamination of Groundwater in Indo-Gangetic Plain / Samikshya Panda, Vinod Kumar Tripathi, DJ Shrinivasa, Reema Sharma -- Soil-Water Interactions and Arsenic Enrichment in Groundwater / Sonam Taneja, Shivani Yadav, Harsh Pipil, Oznur Karaca, A K Haritash -- Arsenic Contamination in Groundwater and Its Removal Strategies with Special Emphasis on Nano Zerovalent Iron / Shivani Thakur, Harminder Singh, Umakant Chaudhari, Sunil Mittal, Prafulla Kumar Sahoo -- Chemical Speciation of Chromium and Arsenic and Biogeochemical Cycle in the Aquatic System / Nitin Verma, Neha Kanojia, Sourav Kalra, Kamal Dua -- Occurrences and Mobility of Uranium in Soil Profile Due to Groundwater-Soil Interaction / Somenath Ganguly, Uday Bhan -- Study of the Rate of CO 2 Consumption with Silicate and Carbonate Weathering in Aquatic System / Uday Bhan, Vamsi Krishna Kudapa, Ranjit Kumar -- Carbonate Chemistry, Carbon Cycle, and Its Sequestration in Aquatic System / Mallika Vashist, Harshit Chawla, S K Singh -- Recent Trends in Fate, Transport, and Transformation of Inorganic and Organic Carbon in Freshwater Reservoirs / Sanchit Kumar, Anshumali -- Role of Microbes in Controlling the Geochemical Composition of Aquatic Ecosystems / Shilky (ORCID: 0000-0001-8292-0385), Subhashree Patra (ORCID: 0000-0002-4624-6968), Anamika Harshvardhan (ORCID: 0000-0002-0540-1220), Amit Kumar (ORCID: 0000-0002-4582-5677), Purabi Saikia (ORCID: 0000-0001-5481-282X) -- Impacts of Pollution on the Hydrogeochemical and Microbial Community of Aquatic Ecosystems in Bayelsa State, Southern Nigeria / Sylvester Chibueze Izah, Adams Ovie Iyiola, Glory Richard -- Aquatic Eco-systems Under Influence of Climate Change and Anthropogenic Activities / Suryadipta Mukherjee, Syed Shams Rizvi, George Biswas, Abhilash Kumar Paswan, Suantak Paolalsiam Vaiphei, Taufique Warsi, Tarik Mitran -- Role of Stable Isotopes in Groundwater Resource Management / Syed Shams Rizvi, M A Mohammed-Aslam, Zameer Ahmad Shah, Taufique Warsi, Mohammad Muqtada Ali Khan, Tarik Mitran, Shyam Kanhaiya -- Assessment of Causes and Impacts of Sand Mining on River Ecosystem / Soumya Pandey, Gaurav Kumar, Neeta Kumari, Richa Pandey -- Nutrient Dynamics in the Polar Ice Sheets and Mountain Glaciers / Monica Sharma Shamurailatpam, AL Ramanathan, N Janardhana Raju -- Index