Spatial distribution and sources of BTEX and TPH contamination in freshwater sediments from Lake Iznik, NW Turkey

Authors : V. Selma ÜNLÜ, Bedri ALPAR

Pages : 304-313

Doi:10.30897/ijegeo.450811

View : 10 | Download : 5

Publication Date : 2018-12-02

Article Type : Research Paper

Abstract :Iznik Lake is an important water supply deteriorating gradually due to anthropogenic pollution. Concentration and distribution of monoaromatic hydrocarbons insert ignore into journalissuearticles values(benzene, toluene, ethylbenzene and three xylene isomers; BTEX); were detected in the lake sediments using a static headspace GC-MS. ∑BTEX concentrations varied between 10.6 and 272.3 µg kg -1 dry weight insert ignore into journalissuearticles values(dw);, with an average of 88.3 µg kg -1 dw. The light aromatic fraction of m-,p -Xylene was the most abundant compound insert ignore into journalissuearticles values(50.0% in average);, followed by toluene insert ignore into journalissuearticles values(31.2%);, o-xylene insert ignore into journalissuearticles values(12.2%);, ethylbenzene insert ignore into journalissuearticles values(5.3%); and benzene insert ignore into journalissuearticles values(1.3%);. Multivariate statistical analyses indicated that the BTEX levels and their distributions were controlled mainly by morphological and textural features of the sediment; anthropogenic inputs transported by the surrounding rivers, mainly influenced by agricultural facilities; absorbance of BTEX compounds in sediment; and biodegradation processes. Due to lack of any national sediment quality guideline regarding BTEX, the results will establish a significant baseline that will shed light on the administrative authorities for formulating their rational environmental strategies.
Keywords : Monoaromatic Hydrocarbons, , Contaminated Sediment, , Pollution Sources, Lake, , Multivariate Analysis