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生物炭对水溶液中肉桂酸的吸附机制研究

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李广坡, 林伟鑫, 杨美玉, 陈卫锋, 魏然, 杨柳明, 钱伟, 倪进治. 生物炭对水溶液中肉桂酸的吸附机制研究[J]. 环境化学, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
引用本文: 李广坡, 林伟鑫, 杨美玉, 陈卫锋, 魏然, 杨柳明, 钱伟, 倪进治. 生物炭对水溶液中肉桂酸的吸附机制研究[J]. 环境化学, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
shu
LI Guangpo, LIN Weixin, YANG Meiyu, CHEN Weifeng, WEI Ran, YANG Liuming, QIAN Wei, NI Jinzhi. Sorption mechanism of cinnamic acid to biochars in aqueous solution[J]. Environmental Chemistry, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
Citation: LI Guangpo, LIN Weixin, YANG Meiyu, CHEN Weifeng, WEI Ran, YANG Liuming, QIAN Wei, NI Jinzhi. Sorption mechanism of cinnamic acid to biochars in aqueous solution[J]. Environmental Chemistry, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
shu

生物炭对水溶液中肉桂酸的吸附机制研究

  • 1.

    福建师范大学地理科学学院, 福州, 350007;

  • 2.

    福建师范大学湿润亚热带生态地理过程教育部重点实验室, 福州, 350007;

  • 3.

    福建师范大学地理研究所, 福州, 350007

  • 基金项目:

    国家自然科学基金青年项目（21607025），福建省公益类研究项目（2016R1032-4，2015R1034-3），福建省自然科学基金项目（2016J05094）和福建省教育厅项目（JAT160116）资助.

Sorption mechanism of cinnamic acid to biochars in aqueous solution

  • 1.

    School of Geographical Science, Fujian Normal University, Fuzhou, 350007, China;

  • 2.

    Key Laboratory of Humid Subtropical Eco-geographical Process of the Ministry of Education, Fuzhou, 350007, China;

  • 3.

    Institute of Geography, Fujian Normal University, Fuzhou, 350007, China

  • Fund Project: Supported by the National Natural Science Foundation, China (21607025), the Fujian Province Non-profit Scientific Research Program for(2016R1032-4,2015R1034-3), the Natural Science Foundation of Fujian Province, China (2016J05094) and the Program of the Education Department of Fujian Province(JAT160116).

  • 摘要: 研究了不同温度（300—900℃）制备的杉木生物炭对水相中肉桂酸的吸附.所有温度下，生物炭对肉桂酸的吸附等温线都呈非线性关系，并以表面吸附为主.高比表面积是800—900℃生物炭吸附量较大的主要因素.为探明生物炭的化学组成对肉桂酸吸附的影响，将吸附量进行了比表面积标化分析，结果表明，300℃生物炭的高含量异质性原子和800—900℃生物炭表面高含量灰分占用了生物炭的吸附点位，导致它们对肉桂酸的标化吸附量明显小于400—700℃生物炭.此外，低pH抑制了600℃生物炭-水溶液中肉桂酸的解离，减少了生物炭表面—OH与解离肉桂酸之间以氢键结合的吸附量，导致400—700℃生物炭中600℃生物炭的标化吸附量最低.研究明确了生物炭的不同性质对肉桂酸吸附的影响及机制，为选择合适的生物炭作为土壤添加剂来降低肉桂酸化感作用提供了科学依据.
    Abstract: Sorption of cinnamic acid in aqueous solution to fir wood-derived biochars produced at different temperatures (300-900℃) was investigated in this study. The sorption isotherms of cinnamic acid to biochars were all nonlinear, and the sorption mechanism was dominated by the surface adsorption. Higher specific surface area (SA) is the main reason of the maximum sorption capacity for the biochars produced at high temperature of 800℃ and 900℃. In order to clarify the effect of chemical compositions of biochars on the sorption capacity for cinnamic acid, the SA normalized sorption capacity was analyzed. The results showed that biochars produced at 300℃ and 800-900℃ contained the highest content of surface heterogeneous atoms and surface ash, respectively, which occupied the adsorption sites of biochars and resulted in lower surface area normalized adsorption capacity of biochars produced at 300℃ and 800-900℃ in comparison with the biochars produced at 400℃-700℃. Low pH suppressed the dissociation of cinnamic acid from 600℃ biochar, which inhibited the formation of hydrogen-bond between the phenolic hydroxyl of biochar and the dissociated cinnamic acid, and reduced the sorption amount of cinnamic acid. Thus the normalized adsorption capacity was lowest for the biochar produced at 600℃ among the biochars produced at 400℃-700℃. This study has clarified the sorption mechanisms of cinnamic acid to biochars with different properties, providing a theoretical basis for choosing suitable biochar as a soil additive to decrease the allelopathic effect of cinnamic acid.
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  • 收稿日期:  2017-09-14
  • 刊出日期:  2018-06-15
李广坡, 林伟鑫, 杨美玉, 陈卫锋, 魏然, 杨柳明, 钱伟, 倪进治. 生物炭对水溶液中肉桂酸的吸附机制研究[J]. 环境化学, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
引用本文: 李广坡, 林伟鑫, 杨美玉, 陈卫锋, 魏然, 杨柳明, 钱伟, 倪进治. 生物炭对水溶液中肉桂酸的吸附机制研究[J]. 环境化学, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
shu
LI Guangpo, LIN Weixin, YANG Meiyu, CHEN Weifeng, WEI Ran, YANG Liuming, QIAN Wei, NI Jinzhi. Sorption mechanism of cinnamic acid to biochars in aqueous solution[J]. Environmental Chemistry, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
Citation: LI Guangpo, LIN Weixin, YANG Meiyu, CHEN Weifeng, WEI Ran, YANG Liuming, QIAN Wei, NI Jinzhi. Sorption mechanism of cinnamic acid to biochars in aqueous solution[J]. Environmental Chemistry, 2018, 37(6): 1245-1252. doi: 10.7524/j.issn.0254-6108.2017091406
shu

生物炭对水溶液中肉桂酸的吸附机制研究

  • 1.  福建师范大学地理科学学院, 福州, 350007;
  • 2.  福建师范大学湿润亚热带生态地理过程教育部重点实验室, 福州, 350007;
  • 3.  福建师范大学地理研究所, 福州, 350007
  • 收稿日期:  2017-09-14
基金项目:

国家自然科学基金青年项目（21607025），福建省公益类研究项目（2016R1032-4，2015R1034-3），福建省自然科学基金项目（2016J05094）和福建省教育厅项目（JAT160116）资助.

摘要: 研究了不同温度（300—900℃）制备的杉木生物炭对水相中肉桂酸的吸附.所有温度下，生物炭对肉桂酸的吸附等温线都呈非线性关系，并以表面吸附为主.高比表面积是800—900℃生物炭吸附量较大的主要因素.为探明生物炭的化学组成对肉桂酸吸附的影响，将吸附量进行了比表面积标化分析，结果表明，300℃生物炭的高含量异质性原子和800—900℃生物炭表面高含量灰分占用了生物炭的吸附点位，导致它们对肉桂酸的标化吸附量明显小于400—700℃生物炭.此外，低pH抑制了600℃生物炭-水溶液中肉桂酸的解离，减少了生物炭表面—OH与解离肉桂酸之间以氢键结合的吸附量，导致400—700℃生物炭中600℃生物炭的标化吸附量最低.研究明确了生物炭的不同性质对肉桂酸吸附的影响及机制，为选择合适的生物炭作为土壤添加剂来降低肉桂酸化感作用提供了科学依据.

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