Assessment of some bottled natural mineral waters and spring waters in Algeria using multivariate statistical analysis, hydrogeochemical approaches and water quality index (WQI)

Abstract

The as-fabricated g-SnS2 and SnS2 nanoparticles were characterized for crystal structure through X-ray diffraction analyses performed through a Philips X'PERT powder X-ray diffractometer with Cu Kα radiation. The surface morphology, size of the particles and diffraction rings of the prepared g-SnS2 were analyzed through TEM, HRTEM and SAED via JOEL JEM 2100 instrument. X-ray photoelectron spectroscopy of g-SnS2 was performed using PHI 5000 VersaProbe III spectrometer. SEM and EDAX were performed to evaluate elements' structure and elemental composition using FEI Quanta FEG 200-High Resolution Scanning Electron Microscope. Photoluminescence spectra were recorded from the Varian Cary eclipse fluorescence spectrophotometer. Bruker Hyperion 3000 FTIR

Impacts of seasonal variations and wastewater discharge on river quality and associated human health risks: A case of northwest Dhaka, Bangladesh

“…The primary goal of any water quality monitoring study is to assess the water quality status for special uses. Water quality indices have been developed around the world, such as Entropy Water Quality Index (EWQI) and the Canadian Council of Ministers of the Environment Water Quality Index (CCMEWQI) [ 42 , 43 ]. However, much attention has been given in recent years to the evaluation of water quality indices in ground and surface water, with the development of the entropy-based water quality index (EWQI) [ [44] , [45] , [46] , [47] ].…”