UV spectra analysis for water quality monitoring in a fuel park wastewater treatment plant

Evaluation of spatial and temporal variation in water quality by pattern recognition techniques: A case study on Jajrood River (Tehran, Iran)

“…Correlation of PCs and original variables is given by loadings, and individual transformed observations are called scores (Wunderlin et al, 2001). Other scientists (like Librando et al, 1995;Gotz et al, 1998;Berzas et al, 2000;Da silva and Sacomani, 2001;Simeonova et al, 2003;Singh et al, 2004;Parinet et al, 2004;Ougang, 2005;Lourenco et al, 2006;Sotelo et al, 2007;Zhou et al, 2007;Wu and Wang, 2007;Andrade et al, 2008;Nakano et al, 2008) also applied PCA to water quality assessment. Table 1 provides a summary of the mean value, standard deviation of 18 measured variables in the river water samples at 18 stations, and the recommended guide and maximum level allowed by the European Directive 80/778/EEC for water qualityintended for human consumption.…”

“…Cluster analysis is not a statistical technique; the results obtained are justified according to their value in interpreting data and indicating patterns (Adams, 1998;Johnson and Wichern, 1992). Many applications of CA for water quality assessments have been reported (see Chen, 1993;Graca and Coimbra, 1998;Vega et al, 1998;Day et al, 1998;Perona et al, 1999;Berzas et al, 2000;Vidal et al, 2001;Wunderlin et al, 2001;Razmkhah, 2002;Simeonova et al, 2003;Mendiguchia et al, 2004;Singh et al, 2004Singh et al, , 2005Lourenco et al, 2006;Astel et al, 2007;Zhou et al, 2007;Andrade et al, 2008;Mahbub et al, 2008).…”

Development of PLS Calibration Models From Uv‐vis Spectra for Toc Estimation at the Outlet of a Fuel Park Wastewater Treatment Plant

“…The latter is composed of liquid effluents with high hydrocarbon content due to occasional spills and of aqueous effluents with detergents and lubricants, mainly from the gas cylinder washing zone. All wastewaters are treated in a dedicated WWTP, described elsewhere [15]. The process effluents pass through a tilted plate interceptor (to remove excess oil) and are fed, with the domestic wastewater, to an activated sludge sequencing batch reactor running on a 12-or 24-hour cycle.…”

“…Thus, UV-Vis spectra of samples collected at the discharge line of a fuel park WWTP were acquired and used for the attempted development of partial least squares (PLS) calibration models for the estimation of TOC. In previous studies, this treated wastewater was found to exhibit spectral variability owing to changes in chemical inputs to the wastewater collection lines [15] but its COD levels could be satisfactorily predicted from UV-Vis spectra, using PLS models [18].…”

“…UV-Vis spectrophotometry is a fast and simple method that has been used for organic matrix composition identification in aqueous samples [12,13], since most organic compounds and some soluble minerals (such as nitrates) absorb in this spectral region. Recent studies have shown that UV-Vis spectra of wastewater samples contain information that can be extracted and used for wastewater quality monitoring [14,15] and also that UV-Vis optical sensors are becoming particularly suitable for in-line measurements owing to the availability of high-quality optical fibres and to the development of robust (no moving parts) submersible spectrometers with auto-cleaning systems [11,16].…”