In this study, the water-soluble inorganic ions (WSIIs) composition of fine particulate matter (PM2.5) was measured in northern Nanjing city from 2015 to 2021. NH4+, NO3− and SO42− concentrations dominated total WSIIs (Na+, K+, Mg2+, Ca2+, Cl−, SO42−), accounting for 87.8%. The nitrate with highest average concentration among all 11.0 μg·m−3. Total were higher winter lower summer, levels Decemb...

Solid acid catalysts of MgO–Al2O3 mixed oxides containing B4O72−, HPO42−, Mo7O246−, MoO42−, WO42−, and SO42− were synthesized by anion exchange with Cl− located in the space between anionic layers hydrotalcite, followed heat treatment at 773 K. The distance hydroxide was expanded intercalation oxyanions larger than Cl−. interlayer confirmed IR spectroscopy. Acid sites generated on obtained elec...

Anaerobic digestion is considered unsuitable for the bioremediation of tannery effluent due to process inhibition, mainly high concentrations sulfur species, and accumulation H2S and/or NH3. This study using standardized biochemical methane potential protocol showed that efficient processing possible with slaughterhouse wastewater, provided sufficient functional biomass present at start SO42? c...

Rainwater (RW) over the Calabar metropolis was analyzed to establish its chemistry, influences, and agricultural suitability. Sampling done in rainy dry seasonal cycles for three years (2018–2020). pH, electrical conductivity (EC), major ions (Ca2+, Na+, Mg2+, K+, HCO3-, Cl-, SO42-) were registered principal component analysis (PCA) ionic ratios used relationships between species project their ...

water quality is a worldwide problem which affects human beings lives fundamentally. water scarcity is intensified in result of quality deterioration. different factors such as population increase, economic development and water pollution could be considered as the origins of the problem. the study and forecasting of water quality is necessary to prevent serious water quality deteriorations in ...

Submicron aerosols (PM1) have more serious effect on the visibility, air quality, human health and climate change compared to coarse particles (particle size between 2.5 10 ?m). There is practical significance in understanding formation mechanisms sources of these particles. In this study, we conducted real-time measurements composition non-refractory submicron (NR-PM1) Guangzhou from 20 Octobe...