期刊名称：Journal of the Asiatic Society of Bangladesh, Science
印刷版ISSN：2408-8676
出版年度：2013
卷号：38
期号：2
页码：155-161
语种：English
出版社：Asiatic Society of Bangladesh
摘要：Gulshan-Baridhara lake located in and around Gulshan, Banani and Baridhara, has always been Dhaka’s most exclusive residential area mainly because of the pristine lake. The lake is elongated in a north south direction and surrounded mainly by residential areas and some industrial units as well. To evaluate the pollution level of the sediment of the lake, samples were collected from 4 selected locations in 4 different seasons. Four different media were used to study the aerobic heterotrophic, enteric and related bacterial count. Aerobic heterotrophic bacterial count was in the range of 1.1 × 10 4 to 1.2 ×10 6 cfu/g in sediment sample, while enteric and related bacterial count in 3 different media (SS agar, MacConkey agar and Cetrimide agar) were 1×10 0 to 1.5×10 4 cfu/g, 1×10 0 to 6×10 4 , and 1×10 0 to 1.1×10 3 cfu/g in sediment, respectively. Out of 23 bacterial isolates 18 were Gram-positive and 5 were Gram-negative. Among the Gram-positive, all were rod shaped spore former and under the genus Bacillus. Out of 5 Gram-negative isolates 2 were the member of Pseudomonas , remaining 3 strains were Escherichia , Aeromonas and Enterobacter . Total nitrogen and phosphorus level along with the presence of different bacterial strains clearly indicated that Gulshan lake sediment was polluted with the chemical and bacterial pollutants. DOI: http://dx.doi.org/10.3329/jasbs.v38i2.15596 J. Asiat. Soc. Bangladesh, Sci. 38(2): 155-161, December 2012
关键词：Heterotrophic bacteria;Enteric bacteria;Physical and chemical pollution;Lake sediment
