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不同环境因素下太湖中四环素的自然消减
摘要点击 2578  全文点击 1557  投稿时间:2013-08-11  修订日期:2013-09-25
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中文关键词  四环素  消减  光照  底泥  硝酸铅  硝酸镉
英文关键词  tetracycline  attenuation  sunlight  sediment  Pb(NO3)2  Cd(NO3)2
作者单位E-mail
段伦超 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
duanlunchao@126.com 
王风贺 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
wangfenghe@njnu.edu.cn 
纪营雪 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
 
张帆 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
 
赵斌 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
 
王国祥 南京师范大学环境科学与工程系,南京 210023
江苏省水土环境生态修复工程实验室,南京 210023
南京师范大学水环境生态修复研究所,南京 210023 
 
中文摘要
      四环素已经广泛应用于兽药生产和疾病治疗中,并通过禽畜粪便等途径进入环境中,基于四环素残留物的危害性,采用了模拟自然环境状态的实验方法,研究了四环素在不同环境状态(光照、底泥、重金属)下的自然消减过程. 结果表明,四环素在自然光照下的消减不明显;未杀菌底泥水体中,四环素的消减速率大于杀菌底泥水体;实验初期,含硝酸铅水体中四环素消减缓慢,随着时间延长,消减速率加快,而在硝酸镉水体中四环素短时间内消减趋势已经十分明显,且消减速率大于硝酸铅水体;以0.08 mmol·L-1四环素为例,四环素在光照下各环境因素中的消减速率依次为:未杀菌底泥(87.2%)>杀菌底泥(70.37%)>硝酸镉水体(64.2%)>硝酸铅水体(32.3%)>空白组(6.6%),各环境因素均促进了四环素的消减.避光时,各环境因素中四环素的消减趋势与光照组相同,但消减速率较光照组小,表明光照对四环素的自然消减具有一定的促进作用.
英文摘要
      Tetracycline (TC) has been widely used in veterinary medicines and disease treatments, and has been discharged into nature system due to manure application. To know the harmfulness of TC residues, and to investigate the natural attenuation of TC under different environmental conditions, simulated attenuation experiments in the presence of light, sediment, Cd(NO3)2 and Pb(NO3)2 were performed. Results showed that the natural attenuation of TC was not obvious under the sunlight, and the natural attenuation rate of TC in water with unsterilized sediment was greater than that with sterilized sediment. The natural attenuation of TC in water with Pb(NO3)2 was slow at the first stage of the experiment, and progressively speeded up as time went on. However, the natural attenuation of TC in water with Cd(NO3)2 was more rapid at the beginning, and significantly faster than that of Pb(NO3)2. The natural attenuation rates of 0.08 mmol·L-1 TC under different conditions follow the sequence: unsterilized sediment (87.2%)>sterilized sediment (70.37%)>Cd(NO3)2(64.2%)>Pb(NO3)2(32.3%)>blank (6.6%), suggesting that all these factors can promote the natural attenuation of TC. Though the natural attenuation trend under different conditions in the dark is similar to that under the sunlight, the natural attenuation rate is less than that under the sunlight, which implicates that sunlight may promote the natural attenuation of TC.

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