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首页> 外文期刊>RSC Advances >Effect of different pyrolysis temperatures on physico-chemical characteristics and lead(ii) removal of biochar derived from chicken manure
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Effect of different pyrolysis temperatures on physico-chemical characteristics and lead(ii) removal of biochar derived from chicken manure

机译：不同热解温度对鸡肉粪肥生物炭的铅（II）源的影响

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摘要

Biochar derived from chicken manure, as an effective metal adsorbent, was prepared through a pyrolysis method at different pyrolytic temperatures (200, 400, 600, and 800 degrees C). The physicochemical characteristics of chicken manure biochar (CMB) and its lead (Pb2+) adsorption mechanisms were studied by batch adsorption experiments, DTA/TGA, XRD, SEM-EDS, FTIR and an analysis of the composition of their mineral ash. Results showed that the best-fit for the Pb2+ adsorption data was achieved using a Langmuir isotherm and a pseudo-second-order model. The maximum adsorption capacities of Pb2+ increased with increasing of pyrolytic temperatures of the CMB, being 180.21, 200.80, 239.59, and 242.57 mg g(-1), respectively, for CMB-200, CMB-400, CMB-600 and CMB-200. Although Pb2+ adsorption on CMB revealed that adsorption was controlled by multiple mechanisms, (e.g. surface complexation, ion exchange, surface precipitation, electrostatic attraction, physical adsorption, and co-precipitation), the ion exchange and surface precipitation played a dominant role in Pb2+ sorption. Using CMB for the removal of Pb from water is proposed as an effective, environmentally protective, novel approach.
机译：生物炭从鸡粪衍生，作为一种有效的金属吸附剂，在不同的热解温度下通过热解方法制备的（200，400，600和800摄氏度）。通过分批吸附实验，DTA / TGA，XRD，SEM-EDS，FTIR和它们的矿物灰的组成的分析进行了研究鸡粪生物炭（CMB）和它的铅（铅离子）吸附机理的物理化学特性。结果表明，最佳拟合的铅离子的吸附数据是使用Langmuir等温和伪二阶模型来实现的。铅离子的最大吸附容量与CMB的热解温度的增加而增加，作为180.21，200.80，239.59，和242.57毫克克（-1），分别用于CMB-200，CMB-400，CMB-600和CMB-200 。虽然CMB铅离子的吸附表明，吸附物通过多种机制来控制，（例如表面络合，离子交换，表面沉淀，静电吸引，物理吸附，和共沉淀），离子交换和表面沉淀起到对Pb2 +吸附主导作用。用于从水中去除铅的使用CMB提出作为一种有效的，环境的保护，新颖的方法。

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  • 来源
    《RSC Advances》 |2020年第7期|共8页
  • 作者

    Yan Cuixia; Xu Yingming; Wang Lin; Liang Xuefeng; Sun Yuebing; Jia Hongtao;

  • 作者单位

    Minist Agr &

    Rural Affairs Key Lab Original Environm Pollut Prevent &

    Contro Tianjin Key Lab Agroenvironm &

    Agroprod Agroenvironm Protect Inst Tianjin 300191 Peoples R China;

    Minist Agr &

    Rural Affairs Key Lab Original Environm Pollut Prevent &

    Contro Tianjin Key Lab Agroenvironm &

    Agroprod Agroenvironm Protect Inst Tianjin 300191 Peoples R China;

    Minist Agr &

    Rural Affairs Key Lab Original Environm Pollut Prevent &

    Contro Tianjin Key Lab Agroenvironm &

    Agroprod Agroenvironm Protect Inst Tianjin 300191 Peoples R China;

    Minist Agr &

    Rural Affairs Key Lab Original Environm Pollut Prevent &

    Contro Tianjin Key Lab Agroenvironm &

    Agroprod Agroenvironm Protect Inst Tianjin 300191 Peoples R China;

    Minist Agr &

    Rural Affairs Key Lab Original Environm Pollut Prevent &

    Contro Tianjin Key Lab Agroenvironm &

    Agroprod Agroenvironm Protect Inst Tianjin 300191 Peoples R China;

    Xinjiang Agr Univ Xinjiang Key Lab Soil &

    Plant Ecol Proc Coll Grassland &

    Environm Sci Urumqi 830052 Peoples R China;

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