ISSN:
1573-5117
Keywords:
algae
;
lindane
;
accumulation
;
degradation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A study was made of accumulation, degradation and biological effects of lindane (r-BHC) on Scenedesmus obliquus (Turp.) Kütz. The work was conducted in a sewage reservoir in Han-Ku, Tianjin. Experimental results show that at 0.1–10 mgl−1 concentration of lindane, the growth, chlorophyll and carotene content in S. obliquus do not differ much from the control. At concentrations of 50–100 mgl−1, however, growth is inhibited, and chlorophyll and carotene content is low. From the beginning of the experiment until the fifth day, growth rate and pigment content increase constantly. On the seventh day, they start to decrease. Spectrographic analysis shows that pigment content decreases, but pigment structure is not changed even at high concentration of lindane. At 1–10 mgl−1 of lindane, amino acids remain unchanged, with the exception of aspartine, arginine, methionine and phenylalanine. Scenedesmus obliquus (Turp.) Kütz possesses a certain accumulating capacity for r-BHC, which is higher at 1 mgl−1 than at 10 mgl−1. Accumulation is enhanced with time and is better under turbulent conditions. Gas chromatograms show that after treatment for 24 h, there are two more peaks at retention time 1′32″ and 1′53″, respectively, suggesting that a certain degree of lindane degradation occurs. The nature of these degradation products awaits further study. As a conclusion S. obliquus (Turp.) Kütz holds promise in the treatment of lindane-containing wastewaters in the range of 1–10 mgl−1.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00007211
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