کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6366863 | 1623112 | 2014 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Estimating organic micro-pollutant removal potential of activated carbons using UV absorption and carbon characteristics Estimating organic micro-pollutant removal potential of activated carbons using UV absorption and carbon characteristics](/preview/png/6366863.png)
- B.E.T., iodine, and nitrobenzene cannot predict OMP removal from WWTP effluent.
- UVA254 reduction predicts average OMP removal independent of PAC product.
- UVA254 removal predicts removal of some OMP precisely, independent of PAC product.
- UVA254 reduction appears to be a feasible parameter for PAC dosage optimization.
Eight commercially available powdered activated carbons (PAC) were examined regarding organic micro-pollutant (OMP) removal efficiencies in wastewater treatment plant (WWTP) effluent. PAC characteristic numbers such as B.E.T. surface, iodine number and nitrobenzene number were checked for their potential to predict the OMP removal of the PAC products. Furthermore, the PAC-induced removal of UV254Â nm absorption (UVA254) in WWTP effluent was determined and also correlated with OMP removal. None of the PAC characteristic numbers can satisfactorily describe OMP removal and accordingly, these characteristics have little informative value on the reduction of OMP concentrations in WWTP effluent. In contrast, UVA254 removal and OMP removal correlate well for carbamazepine, diclofenac, and several iodinated x-ray contrast media. Also, UVA254 removal can roughly describe the average OMP removal of all measured OMP, and can accordingly predict PAC performance in OMP removal. We therefore suggest UVA254 as a handy indicator for the approximation of OMP removal in practical applications where direct OMP concentration quantification is not always available. In continuous operation of large-scale plants, this approach allows for the efficient adjustment of PAC dosing to UVA254, in order to ensure reliable OMP removal whilst minimizing PAC consumption.
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Journal: Water Research - Volume 56, 1 June 2014, Pages 48-55