ノリの硫酸吸収におよぼす産業廃水の影響

概要

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The laver, Porphyra tenera, is very often apt to suffer damage from industrial wastes as it is usually cultured in shallow waters neighboring the mouth of river. Because the cell wall of laver contains a lot of polygalactose-sulfate ester as a main component of it. The author made an attempt to evaluate the effect of wastes on the growth of laver through depression of the rate of sulfuric acid assimilation in polysaccharide fraction of laver from the environ-mental water. The rate of sulfuric acid assimilation was calculated from the specific rodioactivities of sulfuric acids in the environmental water and the polysaccharide fraction. Water temperture, chlorinity, pH and various wastes and chemicals exerted evident influences on the rate, even when no observable symtom was found on the laver.It is conceivable that the effect on the growth is expressed in the change of assimilation rate. Fall of chlorinity to a certain degree and a slight rise in pH promoted the assimilation. Black liquor from kraft pulp mill, waste from alcohol distillery, resin and copper exhibited considerable hindrance to assimilation at the concentration of about 0.25%, 2.5%, 10ppm and 1ppm, respectively.
公益社団法人日本水産学会の論文