Download or read book Effect of Kraft Mill Effluent on Structure and Function of Periphyton Communities written by Harvey Dean Williams and published by . This book was released on 1969 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Raw and biologically stabilized Kraft mill effluents were introduced into laboratory artificial streams at a ratio of 15 ml per liter of water over a two year period. Effluent from the stabilization pond of a second mill was introduced at concentrations of from 5 to 40 ml per liter of water for a period of three months. Trays bearing portions of intact periphyton communities growing on rock rubble were removed from the streams and placed in a photosynthesis-respiration chamber where rates of oxygen production and consumption were measured. Comparisons were made between experimental and control streams on the basis of rates of oxygen production and consumption, P/R ratios, organic matter per unit area, concentration of chlorophyll a, mg of oxygen produced per hour per mg of chlorophyll a, relative frequency of occurrence of filamentous algae and densities of populations of diatoms. Communities from streams receiving raw effluent tended to be more heterotrophic than control communities while communities from streams receiving stabilized effluent tended to be more autotrophic than controls. Stabilized effluent produced a greater number of significant differences in community function and structure than did raw effluent. Nitrates and phosphates added in the stabilization process may have contributed to the greater observed effect. The diatoms Navicula sp., Cocconeis placentula var. euglypta, and Synedra ulna were significantly more abundant in streams receiving raw effluent than in controls. Rhoicosphenia curvata, Fragilaria brevistriata, C. placentula and Achnanthes minutissima were significantly less abundant. Melosira varians, R. curvata and C. placentula were significantly more abundant and S. ulna was less abundant in streams receiving stabilized effluent from mill A than in controls. R. curvata increased in abundance with increasing concentrations of effluent from mill B.M. varians, F. brevistriata and S. ulna decreased with increasing concentrations of effluent from mill B. Total diatom population was significantly reduced by raw and stabilized effluent. Oedogonium sp. was more abundant in streams receiving stabilized effluent. Organic matter and chlorophyll a per unit area decreased with increasing concentrations of effluent from mill B.
Download or read book The Effects of Bleached Kraft Pulp mill Effluent on Periphyton Tissue written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this experiment was to use an artificial stream system to quantify the effect of PME on periphyton biomass and community structure and to compare contaminant concentrations measured in periphyton tissue exposed to a variety of PME concentrations. [...] To assess PME contaminant concentrations in periphyton tissue, periphyton growing on the sides of the streams were sampled at the end of the experiment. [...] The results of PCA are given in Figures 3 and 4 and indicate that PME effects, not only the amount of periphyton present, but also the nature of the community itself. [...] Concentrations of 2,3,7,8-T4 CDD fell below the detection limit in all ten samples while concentrations of 2,3,7,8-T4 CDF exceeded the detection limit only in the four 3% streams and in one of the 1% streams. [...] The results of the artificial stream experiments clearly indicate that the most pronounced impact of PME on the periphyton community was that of nutrient enrichment and subsequent increases in primary production.
Download or read book Effects of Biologically Stabilized Bleached Kraft Mill Effluent on the Periphyton Community in Southern Experimental Streams for 1979 to 1981 written by and published by . This book was released on 1984 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Fate and Effects of Pulp and Paper written by Mark R. Servos and published by CRC Press. This book was released on 2020-02-03 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there have been emerging concerns regarding the fate and effects of pulp and paper mill effluents on the environment. Countries throughout the world are focusing attention on the implementation of regulatory and monitoring programs. In response, industry has begun to implement a variety of process and treatment technologies designed to minimize or eliminate the potential impacts. Environmental Fate and Effects of Pulp and Paper Mill Effluents explores the most active and critical current research and experimentation from around the world. This comprehensive overview examines the identity and origin of chemicals in pulp mill effluents, environmental fate of chemicals from pulp and paper mills, bioaccumulation of substances from pulp mills to fish and wildlife, field and laboratory studies of biochemical and whole organism responses associated with pulp and paper effluents, integrated monitoring and future research, and policy directions of this rapidly evolving field. Written by prominent scientists from around the world with contributions from industry, government, and academia, this important new book provides a balanced global perspective of the recent scientific findings and the challenges being faced in the immediate future.
Download or read book Effects of Bleached Kraft Pulp mill Effluent on Periphyton Tissue written by Kevin J. Cash and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EFFECTS OF BIOLOGICALLY TREATED BLEACHED KRAFT MILL EFFLUENT ON THE PERIPHYTON COMMUNITY IN SOUTHERN EXPERIMENTAL STREAMS FOR 1979 TO 1981 written by Richard E. Rupp and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Biologically Treated Bleached Kraft Mill Effluent on the Periphyton Community in Southern Experimental Streams for 1976 and 1977 written by Dennis L. Borton and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Literature Review of the Effects of Persistent Toxic Substances on Great Lakes Biota written by Yaroslaw Fitchko and published by Windsor, Ont. : International Joint Commission, Great Lakes Regional Office. This book was released on 1986 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Research Summary written by and published by . This book was released on 1962 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of the Effects of Persistent Toxic Substances on Great Lakes Aquatic Populations written by Yaroslaw Fitchko and published by . This book was released on 1984 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Ecotoxicology written by Alain Boudou and published by CRC Press. This book was released on 2018-01-18 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research into ecotoxicology can be classified into three fundamental concerns: abiotic factors, which characterize the physicochemistry of environments; biotic factors, relating to biological structures and functions; and contamination factors, which define the modes of pollution of ecosystems. The most significant research methodologies currently being developed in aquatic ecotoxicology are presented, specifically experimental approaches in the laboratory
Download or read book The Impact of the Forest and Forest Industry on the Environment written by David K. Oyler and published by . This book was released on 1975 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wood and Fiber written by and published by . This book was released on 1970 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstract Bulletin written by Institute of Paper Chemistry (Appleton, Wis.) and published by . This book was released on 1971 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microcosms in Ecological Research written by John P. Giesy and published by . This book was released on 1980 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theses and Dissertations 1966 1970 Oregon State University written by Margaret Basilia Guss and published by . This book was released on 1973 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
