| 陈 淼1，2，唐文浩3，葛成军3，彭黎旭1，2.生物炭对诺氟沙星在土壤中吸附行为的影响[J].广东农业科学,2015,42(20):52-58 |
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生物炭对诺氟沙星在土壤中吸附行为的影响 |
| Effects of biochar on adsorption ofnofloxacin in tropical soils |
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| DOI： |
| 中文关键词: 生物炭 诺氟沙星 砖红壤 吸附 |
| 英文关键词: biochar nofloxacin Latosols adsorption |
| 基金项目:中国热带农业科学院院本级基本科研
业务费专项（1 6 3 0 0 4 2 0 1 4 0 0 4）；国家自然科学基金
（21367011）；海南省自然科学基金（413123） |
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| 中文摘要: |
| 以甘蔗渣为前驱材料，在3 种温度（350、450、550℃）下制备不同碳化度的生物炭（分别记为
BC350、BC450、BC550），研究其对诺氟沙星在砖红壤中吸附行为的影响。结果表明，诺氟沙星在砖红壤和生
物炭土壤上（W/W，1.0%）的吸附动力学过程包括快速和缓慢两个阶段，伪二级动力学模型能较好地拟合砖
红壤和生物炭土壤吸附诺氟沙星的动力学过程（r ≥ 0.963，P ＜ 0.01）；添加质量浓度分别为0.1%、0.2%、
0.5%、0.8%、1.0% 的3 种生物炭提高了砖红壤对诺氟沙星的吸附量，且随着生物炭添加量的增加，吸附量逐
渐增加，添加生物炭后砖红壤对诺氟沙星的单点吸附值是砖红壤的1.04~2.34 倍。诺氟沙星在生物炭土壤中的
吸附过程能够采用Freundlich 模型、Langmuir 模型和Tekmin 模型进行较好的拟合（r ≥ 0.910，P ＜ 0.05）；生
物炭土壤对诺氟沙星的非线性吸附过程主要受到表面吸附作用、分配作用和其他微弱作用力共同影响。生物
炭的施入可以提高土壤对有机污染物的吸附能力，从而降低有机污染物的生态环境风险。 |
| 英文摘要: |
| A series of biochar were prepared by pyrolyzing sugarcane bagasses，a typical tropical
agricultural wastes，at three different pyrolysis temperatures（350，450，550℃），which were referred as
BC350，BC450 and BC550. The effects of biochar on adsorption of nofloxacin on Latosols and the dominant
mechanism of nofloxacin environmental behavior in biochar soils were studied. Results showed that adsorption on
Latosols and biochar-amended soils（W/W，1.0%）included two steps，the fast reaction and the slow reaction.
The adsorption kinetics of nofloxacin on Latosols and biochar-amended soils（W/W，1.0%）accorded with the
pseudo-second-order kinetics equation（r ≥ 0.963，P ＜ 0.01）. When biochar amendment rates were set as
0.1%，0.2%，0.5%，0.8% and 1.0%（W/W）of soils， it could significantly increase the adsorption of nofloxacin
on Latosols，and the adsorption quantity increased with the increasing quantity of biochar. The single-point
adsorption values of nofloxacin on biochar-amended soils were 1.04-2.34 times higher than the on Latosols. The
adsorption and desorption data over the entire range of antibiotics concentrations were well described by the
Freundlich equation，Langmuir equation and Tekmin
equation with r ≥ 0.910 and P ＜ 0.05. Mechanism
of adsorption of nofloxacin on biochar-amended soils
included surface adsorption，partition and other weak
forces. Application of biochar in soil could increase
the adsorption of organic pollutant in soil to decrease
the ecology risk. |
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