Seasonal monıtorıng of nonylphenol compounds ın sewage sludge

Kara Murdoch, Fadime
Sanin, Faika Dilek
Nonylphenol compounds (NPnEO) enter wastewater treatment systems from a number of different sources, including domestic and industrial. These compounds start losing their ethoxy groups during treatment processes and eventually form nonylphenol diethoxylate (NP2EO), nonylphenol monoethoxylate (NP1EO) and nonylphenol (NP) as final products with higher toxic properties. Even though they are removed during wastewater treatment to a certain extent, an important fraction heavily concentrate on solids due to their hydrophobic nature. Due to their toxicity and endocrine disrupting ability, these compounds create concern about land application of sludge. Many countries in Europe including Turkey set the limit value for NPE (NP+NP1EO+NP2EO) as 50 mg/kg dm. Although Turkey set a limit value for these chemicals, no method was suggested for their quantification in related regulations. The determination and monitoring of NP, NP1EO and NP2EO compounds in sewage sludge prior to use for agricultural purposes is critical. Therefore, the aim of the study was to determine the concentrations of NP, NP1EO and NP2EO and monitor the seasonal changes in their concentrations in dewatered sewage sludge samples obtained monthly from Central Wastewater Treatment Plant, Ankara for a year. In order to identify and quantify NP compounds in sludge samples a GC/MS was used. Results showed that the compounds of interest were detected in sludge samples, however, all values measured were lower than the limit required by the regulation.
SEASONAL MONITORING OF NONYLPHENOL COMPOUNDS IN SEWAGE SLUDGE, 14. International Conference on Environmental Science and Technology, 3 - 05 Eylül 2015


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Citation Formats
F. Kara Murdoch and F. D. Sanin, “Seasonal monıtorıng of nonylphenol compounds ın sewage sludge,” presented at the SEASONAL MONITORING OF NONYLPHENOL COMPOUNDS IN SEWAGE SLUDGE, 14. International Conference on Environmental Science and Technology, 3 - 05 Eylül 2015, Rhodes, Greece, 2015, Accessed: 00, 2021. [Online]. Available: