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Human health and sustainable socio-economic growth are closely linked to water quality. Due to increasingly intense human activity, pollutants, and in particular trace elements, are entering the aquatic system and harming humans. The main objective of this study is to analyse and compare the impact of the trace elements on the water quality of natural springs. The concentrations of ten trace elements in 12 spring water samples collected in 2022 were analyzed using ICP-MS to determine the spatial variability of natural water quality in the Ouislane watershed. Nine major trace elements (boron, cobalt, chromium, copper, manganese, nickel, lead, zinc, and vanadium) were measured using the inductively coupled plasma mass spectrometry (ICP-MS) technique. The average values of these elements followed the descending trend: B > Ni > Cr > Co > Zn > Mn > V > Cu > Pb in spring water samples. Some trace elements measured in certain water samples exceed the upper limits set by Moroccan drinking water quality standards (NM) and the World Health Organization (WHO). From the principal components analysis (PCA), 83% of the variation is explained by the first three main components. B, Co, Cr and Ni have a strongly impact on water quality explain by their strong correlation with CP1 (R2 > 0.70). The calculated water quality index (WQI) values ranged from 61.18 to 95.11, with an average of 78.47. Approximately 17% of the water samples were categorized as excellent quality water (WQI < 50), with the remaining 83% classified as good quality water (50 < WQI < 100). According to the WQI index, all the natural spring waters investigated are deemed suitable for human consumption.

Researchers from Rutgers University, NJ, measured the adsorption of polycyclic aromatic hydrocarbons by soot carbon and aerosol organic matter using soot/air and octanol air partition coefficients as an evaluation tools.

Researchers from Rutgers University measured the concentration of polycyclic aromatic hydrocarbons such as phenanthrene and benzopyrene in the atmosphere of the New Jersey coast.

A report provides proof of dynamic air-water exchange of polychlorinated dibenzo-p-dioxins and furans in the Hudson River Estuary.

Researchers from Rutgers University, New Jersey evaluated the atmospheric seasonal trends of alkylphenols, nonylphenol and tert-octylphenol, in the atmosphere of the lower Hudson River Estuary region during the period of June to December of 1998.

Results of a study indicate that air-water exchange dynamics are influenced by phytoplankton biomass, physical parameters, and growth rate.

Researchers from Rutgers University, NJ, documented for the first the presence of nonylphenols in the atmosphere arising from the biodegradation of nonylphenol polyethoxylates, a popular household surfactant, in water. The byproduct is an estrogenic nonylphenol, evaporating from the estuarine waters to the coastal atmosphere and is found in high concentrations from New York to New Jersey.

The concentration of polychlorinated biphenyls (PCB) and polycylic aromatic hydrocarbons (PAH) in both snow and rain water samples were correlated with PCB and PAH readings in air samples to study atmospheric scavenging of both pollutants. PCB and PAH concentrations were shown to highest in the snow samples, which shows atmospheric scavenging to be dependent on the particle phase of the pollutant. Air scavenging of the pollutants were shown to be effective only on pollutants with low molecular weight.

Results from the gas-particle partitioning of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons in the urban Chicago and the adjacent southern Lake Michigan atmosphere reveal that the PAHs and PCBs in the areas are at equilibrium. The slopes of the regressions of log Kp against the subcooled liquid vapor pressure from samples continental background origin are among the smallest measured, -0.70 to -0.53 and -0.16 to -0.56 for PAHs and PCBs, respectively. The figures indicate sufficient atmospheric residence times to reach equilibrium.

Higher surface concentrations of the pesticide toxaphene was found in the northern part of Lake Michigan than in the southern part of the lake. Findings from some of the sediment cores examined at the Great Lakes indicate that toxaphene has slow degradation rate. The similar concentrations among all the Great Lakes suggest that the main bulk of toxaphene at the Great Lakes had come from the atmosphere.

The fate and sources of atrazine in the Great Lakes can be determined using a dynamic mass balance model. The effectivity of the model depends upon the use of given inputs and losses and the manipulation of independent variables to match model results with measured concentrations. The model has effectively shown that the internal transformation of atrazine is a constant occurrence in the Great Lakes, with Lake Michigan, Huron and Ontario yielding similar transformation rates that ranges from 0.05 to 0.075 yr-1.