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Study on the Distribution of Odourous Compounds in Eutrophic Water Body and the Products of Anaerobic Metabolizing of Algaes

Author: ShenLiJuan
Tutor: WangZhengPing
School: Nanjing University of Technology and Engineering
Course: Environmental Engineering
Keywords: Eutrophic water Taihu Lake Odor substances Distribution patterns Alga
CLC: X52
Type: Master's thesis
Year: 2010
Downloads: 118
Quote: 1
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Abstract


Headspace - solid phase microextraction - gas chromatography / mass spectrometry (HS-SPME-GC/MS) analysis method typical eutrophic water of dissolved and particulate odor compounds was measured to study the distribution of morphological variation . First select the five kinds of odor substances Determination of particulate substances made ??validation results showed that the relative standard deviation of the method is less than 6% of the recoveries in the range of 90% to 120% , the precision of the method and accuracy to meet the analysis requirements . Odor substances in the the 2009 the Taihu M waters at and X waterworks water sources in water samples filtered water and suspended solids were measured on this basis , and found that the distribution pattern of the different types of odor substances in the water phase and suspended solids differences and variation , distribution patterns and variation of the same substance in different locations of water bodies , there are similarities and differences . Summer Taihu Lake there are a large number of particles the state odor substances , nine kinds of odor substances particulate content peaked in July and August , the particulate the odor substance content of the algae content are positively correlated . 15 ℃, 30 ℃, 45 ℃ under the conditions of the algae anaerobic sealing culture experiments to study the variation of the metabolites produced algae decomposition process , and found that there are significant differences between the various substances variation , and some substances variation is closely related to the level of temperature . Fatty acids substances appear 2 times the peak period, as temperature increases, the peak period of the butyric acid and acetic acid in advance , yield increases , propionic peak period is delayed , the maximum yield at 30 ℃ ; hydrogen and carbon dioxide appears times the peak of the peak of the higher temperature advance methane appears three times in the peak period , the time and temperature appears no significant correspondence between the three gases are the highest yield at 30 ℃ ; algae decomposition process , dimethyl sulfur species , 2 - methyl iso Borneol , soil monosodium glutamate and p- ionone generated, these substances subsequently be degraded , while the p- cyclocitral and m-xylene in the whole process is directly degradation, and increase temperature to promote the formation and degradation of the odor substances .

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control
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