| 土壤沉积物吸附对2, 4－D生物降解速率的影响 |
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| 引用本文： | 范成新,邹惠仙,许鸥泳.土壤沉积物吸附对2, 4－D生物降解速率的影响[J].环境科学学报,1994,14(1):87-97. |
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| 作者姓名： | 范成新 邹惠仙 许鸥泳 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所, 210008,南京大学环境科学系,南京大学环境科学系 |
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| 摘 要： | 提出一个吸附对有机物生物降解影响的数学模型。模型中考虑了有吸附剂存在下体系可能出现的四种降解类型。用从土壤中分离出的２，４－Ｄ降解菌株，在有土壤或沉积物存在下与２，４－Ｄ进行生物降解实验。在菌体浓度不变的情况下，估算和比较了３０℃时四种降解作用的速率常数。结果表明，吸附的２，４－Ｄ不被水中和吸附的细菌所利用；而水中的２，４－Ｄ则可被水中和吸附的细菌所降解。进一步分析认为，并非所有生物降解都受到吸附
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| 关 键 词： | 生物降解 吸附 土壤 2 4－D 沉积物 |
| 收稿时间： | 1992/6/10 0:00:00 |
EFFECTS OF SOIL(SEDIMENT)ADSORPTION ON BIODEGRADATION RATES OF 2, 4-D |
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| Fan Chengxin,Zou Huixian and Xu Ouyong.EFFECTS OF SOIL(SEDIMENT)ADSORPTION ON BIODEGRADATION RATES OF 2, 4-D[J].Acta Scientiae Circumstantiae,1994,14(1):87-97. |
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| Authors: | Fan Chengxin Zou Huixian and Xu Ouyong |
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| Institution: | Nanjing Institute of Geography &, Limnology, Chinese Academy of Sciences, 210008,Environmental Sciences Department, Nanjing University and Environmental Sciences Department, Nanjing University |
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| Abstract: | A mathematics model was proposed to describe the effects of adsorptionof soil(sediment)on organic biodegradation rates of 2, 4-D.Four kinds ofchemical-bacteria interactions have been considered:(1)bacteria in waterreacting with chemicals in water;(2)bacteria in water reacting withadsorbed chemicals;(3)adsorbed bacteria reacting with chemicals in waterand(4)adsorbed bacteria reacting with adsorbed chemicals. The degradingbacteria strain(pseudomonas sp.)was isolated from soil and adapted with2, 4-D.Bacteria sorption on soil(sediment)was determined with the bacterialabeled P32.The results showed that 2, 4-D adsorbed on soil(sediment)wasavailable neither to the bacteria in water nor to the bacteria on soil(sedi-ment).It could be drawn from the model that biodegradation is not bound tobe inhibited in the presence of adsorbent and it can be stimulated under cer-tain conditions. |
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| Keywords: | biological degradation adsorption soil 2 4-D |
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