Causes and Effects. River Pollution by Louis Klein
By Louis Klein
River pollutants 2: explanations and results bargains customarily with the motives of river toxins and the character of some of the forms of toxins and their results upon rivers. This e-book is an up to date model of the 1st 8 chapters of features of River pollutants (first released early in 1957). because of the quick improvement of the topic and the ever-increasing volume of literature dedicated to it, a few sections were nearly rewritten, a lot new topic has been further, and minor adjustments made during the textual content.
This ebook starts off with a evaluate of the lengthy background of river pollutants, that are traced again to historic civilizations. Separate chapters take care of felony features of river pollutants; the character and results of river toxins; the reasons of river pollutants; and makes use of of river water. next chapters hide the biochemical and physicochemical facets of river toxins; the effect of river pollutants on fishes; and organic elements of river pollutants.
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One example of this is the reaction between mine water and the natural bicarbon ate alkalinity of a river to give an unsightly reddish-brown opal escence and eventually a deposit of ferric hydroxide, Fe(OH) 3 ; if the stream is devoid of dissolved oxygen the water may turn black * See, however, footnote on p. 14. 46 RIVER POLLUTION owing to formation of ferrous sulphide. , present in gas liquor. RED LICH 68 has pointed out that wastes from tanneries using the vege table tan process may cause deep green or inky-blue colorations or precipitates if discharged to iron-containing streams owing to interaction of tannins with iron.
M. in the river) completely exterminated all animal life for a distance of over 10 miles, and even sewage fungus was absent or very rare, while algae were extremely rare (see Chapter 8). Zinc is another heavy metal that is very toxic to fish. m. which proved fatal to the fish. The author has experience of a number of cases of mortality amongst fish caused by the presence of traces of zinc in solution. ) passed into solution to cause the death of many coarse fish in the lodge. g. viscose rayon wastes, wastes from rubber factories, wastes from the manufacture of zinc compounds) contain consider able quantities of zinc.
M. m. in soft water). The values obtained in hard water were very much greater. Metallic contamination in a stream, especially arsenic and lead, may constitute a danger to public health if the water is to be used subsequently for drinking purposes. S. Public Health Service has fixed maximum desirable limits for these and other common toxic metals in drinking water (cf. Chapter 5, page 151). It is only within comparatively recent years that fluorides have been recognized as toxic substances. In view of the increasing NATURE AND EFFECTS OF POLLUTION 41 commercial manufacture and use of chemicals, refrigerants, plastics, insecticides, and other materials containing fluorine, many more industrial effluents will contain fluorides.