Research Abstracts

Desalination of brines produced from oil and gas fields is a potential resource for potable water in the southwestern U.S. and other semi-arid areas. Oilfield brines typically contain high concentrations of Na+ and Cl!, as well as other multivalent cations and anions that can reduce efficacy of reve

The kinetic of precipitation of calcium sulfate dihydrate (gypsum) in sodium chloride solutions was investigated at various supersaturation from 1.05–2.49, pH = 8.50, 25°C and ionic strength 0.5 M. The rate of precipitation showed a quadratic dependence upon the relative supersaturation which sugges

The present work experimentally studied the clarification of wastewater using the electroflotation technique (EF) with aluminum electrodes. In the first part, we have studied the principal parameters (feed tension U, distance between electrodes D, period of treatment t, pH and conductivity κ) affect

Demineralisation of tap water, produced from surface water (lake), by a membrane distillation process has been investigated. The temperature caused the decomposition of bicarbonates presented in the feeding water and the formation of alkaline scaling on the membrane surface. In the present work the

The process of desalting of a proline modelling solution by electrodialysis in five- and six-chamber electrodialysis apparatus was investigated. It has been shown that the process effectively proceeded in the six-chamber device. Changes of dry substances and pH of the proline modeling solution and a

Sewage sludge has been used as fertilizer for agricultural land over a long time. This is part of a sustainable practice utilizing and recycling the macronutrients back to land. During the last decades, questions have been raised concerning the risks related to heavy metals and xenobiotic organic co

In this study fixed-bed sorption filters are filled with an iron based sorbent (ferrosorp plus, FP) and used to remove a range of heavy metals (i.e. As, Cd, Cr, Cu, Ni, and Zn) from polluted water. It is found that FP is very effective at simultaneous removal of the heavy metals, and the magnitude o

In this study, an ecotoxicological survey of complex mixture effluents collected from textile, leather and municipal influents and effluents, an unsanitary landfill leachate, and river waters and sediments of the Ergene River Basin is presented. Acute toxicity tests were applied by bacterial lumines

The study concerned surface water contamination of two perfluorinated compounds: perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA). Surveys were repeatedly conducted in the Yodo River basin in order to find out the contamination profiles and the sources of these compounds. Collected sam

The partitioning level of a catchment in storm water runoff modelling becomes an issue if the calculated results from the different number of subcatchments show the same performance. This study aims to identify the proper processing level of spatial resolution for the SWMM model application in an ur