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Start Over Topic water pollutants, chemical Publisher taylor & francis group
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1. The effects of pulp and paper mill effluent on physiological and hematological endpoints in fingerling largemouth bass (Micropterus salmoides).

Author

Baer KN, Bankston CR, Mosadeghi S, and Schlenk D

Subjects
Animals, Hematocrit, Liver drug effects, Liver metabolism, Lymphocytes drug effects, Lymphocytes metabolism, Neutrophils drug effects, Neutrophils metabolism, Spleen drug effects, Spleen metabolism, Stress, Physiological drug effects, Bass, Industrial Waste adverse effects, Paper, Water Pollutants, Chemical toxicity
Abstract

The purpose of this study was to evaluate the effects of bleached kraft mill effluent on selected physiological and hematological endpoints in fingerling largemouth bass (Micropterus salmoides). Fish were exposed for 35 days to surface water collected at sites up- and downstream from a pulp and paper mill treatment-effluent discharge. The condition factor, spleen somatic index, and pronephros cellularity were statistically significantly decreased in fish exposed to the downstream site, compared to the upstream site. There was also a shift from lymphocytes to neutrophils in peripheral blood of fish exposed to the downstream site. Hematocrit values and the liver somatic index were statistically significantly increased in fish in the downstream exposure. These results indicate that in-stream exposure to elemental-chlorine-free pulp and paper mill effluents produce a generalized stress response, leading to potential immunosuppression in fish.

Published
2009
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2. Comparison of different wastewater treatments for removal of selected endocrine-disruptors from paper mill wastewaters

Author

Noemi Merayo, Damjan Balabanič, Angeles Blanco, Aleksandra Krivograd Klemenčič, and Daphne Hermosilla

Subjects
Paper, Environmental Engineering, Dibutyl phthalate, Ultrafiltration, 02 engineering and technology, 010501 environmental sciences, Endocrine Disruptors, Membrane bioreactor, Diethyl phthalate, 01 natural sciences, Waste Disposal, Fluid, Gas Chromatography-Mass Spectrometry, 12. Responsible consumption, Water Purification, Industrial wastewater treatment, chemistry.chemical_compound, Ozone, Benzyl butyl phthalate, 0105 earth and related environmental sciences, Biological Oxygen Demand Analysis, Titanium, Solid Phase Extraction, Ingeniería química, General Medicine, 021001 nanoscience & nanotechnology, 6. Clean water, Industria del papel, chemistry, Wastewater, 13. Climate action, Environmental chemistry, Medio ambiente, Sewage treatment, 0210 nano-technology, Oxidation-Reduction, Dimethyl phthalate, Water Pollutants, Chemical
Abstract

There is increasing concern about chemical pollutants that have the ability to mimic hormones, the so-called endocrine-disrupting compounds (EDCs). One of the main reasons for concern is the possible effect of EDCs on human health. EDCs may be released into the environment in different ways, and one of the most significant sources is industrial wastewater. The main objective of this research was to evaluate the treatment performance of different wastewater treatment procedures (biological treatment, filtration, advanced oxidation processes) for the reduction of chemical oxygen demand and seven selected EDCs (dimethyl phthalate, diethyl phthalate, dibutyl phthalate, benzyl butyl phthalate, bis(2-ethylhexyl) phthalate, bisphenol A and nonylphenol) from wastewaters from a mill producing 100 % recycled paper. Two pilot plants were running in parallel and the following treatments were compared: (i) anaerobic biological treatment followed by aerobic biological treatment, ultrafiltration and reverse osmosis (RO), and (ii) anaerobic biological treatment followed by membrane bioreactor and RO. Moreover, at lab-scale, four different advanced oxidation processes (Fenton reaction, photo-Fenton reaction, photocatalysis with TiO(2), and ozonation) were applied. The results indicated that the concentrations of selected EDCs from paper mill wastewaters were effectively reduced (100 %) by both combinations of pilot plants and photo-Fenton oxidation (98 %), while Fenton process, photocatalysis with TiO(2) and ozonation were less effective (70 % to 90 %, respectively).

Published
2012