{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,6]],"date-time":"2025-12-06T21:44:58Z","timestamp":1765057498671,"version":"3.38.0"},"reference-count":28,"publisher":"SAGE Publications","issue":"9","license":[{"start":{"date-parts":[[2010,9,1]],"date-time":"2010-09-01T00:00:00Z","timestamp":1283299200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Appl Spectrosc"],"published-print":{"date-parts":[[2010,9]]},"abstract":"<jats:p> The present work assesses the possibility of using spectrophotometry in the near-mid-ultraviolet and visible wavelength ranges (282\u2013790 nm) for the direct monitoring of treatment performance in municipal wastewater treatment plants (WWTPs). Principal component analysis (PCA) was used to analyze spectral data from samples collected along three WWTP process lines with different primary and secondary treatment units. The clustering observed in PCA score plots was mainly attributed to the suspended solids fraction present in the wastewater and highlighted differences in solids quality between plants and along the treatment lines. Thus, satisfactory partial least squares (PLS) calibration models to estimate total suspended solids (TSS) values from the acquired spectra could only be established per plant. The PLS models were established using 1\u20132 factors, with root mean error of cross-validation and coefficient of determination values in the 50\u201386 mg TSS L<jats:sup>\u22121<\/jats:sup> and 82\u201395% ranges, respectively. <\/jats:p>","DOI":"10.1366\/000370210792434332","type":"journal-article","created":{"date-parts":[[2010,10,6]],"date-time":"2010-10-06T04:01:59Z","timestamp":1286337719000},"page":"1061-1067","source":"Crossref","is-referenced-by-count":18,"title":["Use of Spectra in the Visible and Near-Mid-Ultraviolet Range with Principal Component Analysis and Partial Least Squares Processing for Monitoring of Suspended Solids in Municipal Wastewater Treatment Plants"],"prefix":"10.1177","volume":"64","author":[{"given":"N\u00eddia D.","family":"Louren\u00e7o","sequence":"first","affiliation":[{"name":"IBB\u2014Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T\u00e9cnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal (N.D.L., F.P., H.M.P.); and SMAS de Almada, Praceta Ricardo Jorge, 2-2A Pragal, 2800-585 Almada, Portugal (A.S.)"}]},{"given":"F\u00e1tima","family":"Paix\u00e3o","sequence":"additional","affiliation":[{"name":"IBB\u2014Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T\u00e9cnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal (N.D.L., F.P., H.M.P.); and SMAS de Almada, Praceta Ricardo Jorge, 2-2A Pragal, 2800-585 Almada, Portugal (A.S.)"}]},{"given":"Helena M.","family":"Pinheiro","sequence":"additional","affiliation":[{"name":"IBB\u2014Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T\u00e9cnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal (N.D.L., F.P., H.M.P.); and SMAS de Almada, Praceta Ricardo Jorge, 2-2A Pragal, 2800-585 Almada, Portugal (A.S.)"}]},{"given":"Alexandra","family":"Sousa","sequence":"additional","affiliation":[{"name":"IBB\u2014Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Instituto Superior T\u00e9cnico, Technical University of Lisbon, Av. Rovisco Pais 1049-001 Lisbon, Portugal (N.D.L., F.P., H.M.P.); and SMAS de Almada, Praceta Ricardo Jorge, 2-2A Pragal, 2800-585 Almada, Portugal (A.S.)"}]}],"member":"179","published-online":{"date-parts":[[2010,9,1]]},"reference":[{"key":"bibr1-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/j.trac.2006.11.009"},{"key":"bibr2-000370210792434332","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2003.0074"},{"key":"bibr3-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/j.trac.2004.09.008"},{"key":"bibr4-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/j.watres.2005.09.040"},{"key":"bibr5-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1080\/05704920802031382"},{"key":"bibr6-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/B978-044452701-1.00012-0"},{"key":"bibr7-000370210792434332","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2008.147"},{"key":"bibr8-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2008.08.031"},{"key":"bibr9-000370210792434332","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2004.0004"},{"key":"bibr10-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1007\/s00216-009-3042-z"},{"key":"bibr11-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/S1462-0758(02)00019-5"},{"key":"bibr12-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1080\/09593331708616383"},{"key":"bibr13-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/S0167-9244(07)80004-7"},{"key":"bibr14-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemosphere.2006.03.041"},{"key":"bibr15-000370210792434332","doi-asserted-by":"publisher","DOI":"10.2166\/wst.2003.0086"},{"key":"bibr16-000370210792434332","doi-asserted-by":"publisher","DOI":"10.1080\/09593330802015581"},{"key":"bibr17-000370210792434332","unstructured":"APHA, American Public Health Association, Standard Methods for the Examination of Water and Wastewater, Eaton A. 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