Seven-year study of monsoonal rainwater chemistry over the mid-Brahmaputra plain, India: assessment of trends and source regions of soluble ions

• Published in: Environmental science and pollution research international 2022-04, Vol.29 (17), p.25276-25295
• Main Authors: Ahmed, Md. Sahbaz, Bhuyan, Pranamika, Sarkar, Sayantan, Hoque, Raza R.
• Format: Article
• Language: English
• Subjects: Air Pollutants - analysis; Annual variations; Anthropogenic factors; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Biomass; Biomass burning; Burning; Calcium ions; Chemical analysis; Chemistry; Coal - analysis; Constituents; Dust; Dust - analysis; Earth and Environmental Science; Ecotoxicology; Electrical conductivity; Electrical resistivity; Emissions; Environment; Environmental Chemistry; Environmental Health; Environmental Monitoring; Environmental science; Fossil fuels; Fuel combustion; Human influences; Ions; Ions - analysis; Magnesium; Monsoons; pH effects; Principal components analysis; Rain; Rain water; Research Article; Seasons; Seawater; Statistical analysis; Statistical methods; Statistical tests; Trends; Waste Water Technology; Water analysis; Water Management; Water Pollution Control
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-021-17385-7

This work is a 7-year study of monsoonal rainwater chemistry ( n  = 302), over mid-Brahmaputra plain during 2012 to 2018. The samples were analyzed for major chemical parameters viz. pH, electrical conductivity (EC), and ions (SO 4 2− , NO 3 − , Br − , Cl − , F − , Mg 2+ , Ca 2+ , K + , NH 4 + , Na + , and Li + ) to assess the chemistry. The mean pH of rainwater varied among the years, which was maximum in 2018 (6.18 ± 0.72) and minimum in the year 2014 (5.39 ± 0.54), and the variations were significant at p