title: Chlorinated solvents in a petrochemical wastewater treatment plant: an assessment of their removal using self-organising maps.
abstract: The self-organising map approach was used to assess the efficiency of chlorinated solvent removal from petrochemical wastewater in a refinery wastewater treatment plant. Chlorinated solvents and inorganic anions (11 variables) were determined in 72 wastewater samples, collected from three different purification streams. The classification of variables identified technical solvents, brine from oil desalting and runoff sulphates as pollution sources in the refinery, affecting the quality of wastewater treatment plant influent. The classification of samples revealed the formation of five clusters: the first three clusters contained samples collected from the drainage water, process water and oiled rainwater treatment streams. The fourth cluster consisted mainly of samples collected after biological treatment, and the fifth one of samples collected after an unusual event. SOM analysis showed that the biological treatment step significantly reduced concentrations of chlorinated solvents in wastewater.
authors.affiliation: Department of Analytical Chemistry, Gdańsk University of Technology, 11/12 G. Narutowicza St., 80-233 Gdańsk, Poland. marektobiszewski@wp.pl
authors.forename: Marek
authors.initials: M
authors.lastname: Tobiszewski
authors.forename: Stefan
authors.initials: S
authors.lastname: Tsakovski
authors.forename: Vasil
authors.initials: V
authors.lastname: Simeonov
authors.forename: Jacek
authors.initials: J
authors.lastname: Namieśnik
mesh_terms: D016000:Cluster Analysis; D054879:Halogenation; D016571:Neural Networks, Computer; D010578:Petroleum; D012997:Solvents / Q000737:chemistry* / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D010578:Petroleum; D012997:Solvents; D014874:Water Pollutants, Chemical