Chemical Characterization of Wet Depositions in Urban and Rural Area

Abstract

The aim of this study was to determine the chemical composition of wet depositions in two locations from urban and rural area near Bucharest from January to May 2017. For all the samples, pH, conductivity, anions, cations and heavy metals were determined. For anions (Cl -, NO3 -and SO4 2-) and cations (Ca 2+ , K + , Mg 2+ , Na 2+ ) determination an ion chromatographic method was used. Heavy metals (Co, Cr, Cu, Mn, Ni, Pb and Zn) were determined using AAS with flame and graphite chamber. Results showed the presence of the interested compounds in wet depositions samples with SO42-and Ca 2+ as the dominant anion and cation. Heavy metals concentration followed the trend: Zn > Mn > Cu > Pb > Ni > Cr > Co. Analysing the results obtained the potential sources of ambient air pollution were also suggested.

Physico–chemical Characteristics and Wastewater Quality Index for Evaluating the Efficiency of Treatment Process Effluent

“…The influent composition at the entrance of the wastewater treatment plant is due to the different types of contaminants present in the initial waters. For example, the wastewater can contain mainly organic compounds and various microorganisms (bacteria, viruses, parasites) while the rainwater can contain especially inorganic and mineral compounds (Petrescu et al 2017, Bucur et al 2010. In 1970s the concept of Water Quality Index (WQI) has been developed for easy understanding of water quality by representing it as numeric value between 0 (Poor) to 100 (Excellent) (Mudiya 2012, Vijayan et al 2016.…”

New Approaches Regarding Bat Conclusion Implementation

“…Activity domains for which they were adopted the BAT Conclusions In this paper approaches are discussed the novelties in the field of large combustion plants based on charcoal and the odour evaluation in the intensive pigs and chicken farming; Large combustion plants are plants with a total rated thermal input bigger or equal to 50 MW, irrespective of the type of fuel, solid, liquid or gaseous used for generating electricity and/or heat. One of the major environmental problems generated by the operation is the air emissions of SOx, NOx, CO, dust and also greenhouse gases such as N2O and CO2 (Barbu et al 2015, Danciulescu et al 2017 and small quantities of heavy metals (Petrescu et al 2017), halogenated compounds and dioxins, furans, depending on the chemical composition of the fuel used, the operating regime and applied emission reduction technologies (Nicolescu et al 2017. Taking into account the specific requirements of the BAT Conclusions, the first results obtained in the process of assessing the emission of HCl, HF and mercury in case of large combustion plants based on charcoal are also presented.…”

Microstructural and Chemical Characterization of Some Wastes for Phono Absorbent Materials Obtaining

“…The increase of the world population related with human activities from the last century, esspecially from industry and transports, have lead to an accentuate deterioration of the environmental air, with significant effects on climate, affecting the environment and also human health (Bucur & Danet 2016, Danciulescu et al 2015, Minghua et al 2009, Petrescu et al 2017. This paper have an great importance theme with economic and ecological impact regarding the different wastes use which by their storage can affect the quality of the environment, in order to obtain composite materials with sound absorbing properties.…”