Urban Sludges Utilization in Agriculture: Possible Limitations Due to Their Contamination with Polycyclic Aromatic Hydrocarbons

ProEnvironment Promediu

Livia ALHAFEZ¹  Dumitru RISTOIU¹  Nicoleta MUNTEAN²  Edward MUNTEAN²  Marcel DUDA² 

[1] BabeÅŸ-Bolyai University, Faculty of Environmental Sciences, 30 Fantanele Street, 400294 Cluj-Napoca, Romania;University of Agricultural Science and Veterinary Medicine Cluj-Napoca, Mănăştur Street, no. 3 - 5400372 Cluj-Napoca, Romania

关键词: soil;    sludge;    polycyclic aromatic hydrocarbons;    PAH;    pollution.;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Bioflux SRL

【 摘 要 】

The objective of the present study was to assess the polycyclic aromatic hydrocarbons’ (PAH) contamination of urban sewage sludge - a potential agricultural fertilizer, as a result of the increasing environmental concern regarding the fate of biodegradable solid wastes generated by wastewater treatment processes. PAHs were determined by an Agilent 1100 high performance liquid chromatograph with fluorescence and diode-array detection, separations being accomplished using an Envirosep PP column with a mixture of acetonitrile: water as mobile phase. This study revealed a low contamination of sewage sludge originating from Cluj Napoca wastewater treatment plant with PAHs (15.61 μg/kg dry weight for overall PAHs concentration) during a four-month monitoring period, with individual concentrations ranging from 0.06 to 11.50 μg/kg dry weight, the highest recorded values being for naphthalene (11.50 μg/kg dry weight), phenantrene (1.39 μg/kg dry weight) and benzo (g, h, i) perylene (0.63 μg/kg dry weight). As the recorded values during the study period were low, we can conclude that the environmental risks related with PAHs contamination is quite low; due to their hydrophobic character, groundwater pollution by levigation can be also excluded. However, seasonal variations of PAHs contamination are possible and for this reason this study will be extended for a full-year period.  

【 授权许可】

CC BY