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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Low cost earthworm manure-derived carbon material for the adsorption of Cu2+ from aqueous solution: Impact of pyrolysis temperature
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Low cost earthworm manure-derived carbon material for the adsorption of Cu2+ from aqueous solution: Impact of pyrolysis temperature

机译：低成本的蚯蚓粪便衍生的碳材料，用于吸附Cu2 +来自水溶液的Cu2 +：热解温的影响

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摘要

Earthworm manure, an emerging and abundant bio-waste from vermicomposting, was subjected to pyrolyze at 400-600 degrees C to prepare carbon material (EMBCs) for the removal of Cu2+ from aqueous solution. The adsorption capability and inherent mechanism were thoroughly investigated. All adsorption processes of Cu2+ by EMBCs were described through Langmuir isotherm model and pseudo-second-order model. The adsorption capacity of EMBCs was declined with the pyrolysis temperature, while the binding strength between EMBCs and Cu2+ was significantly enhanced accordingly. The adsorption process of Cu2+ by EMBCs was found to be dominated by precipitation, complexation, CTr-cations interactions. Precipitation was mainly stimulated by silicates and phosphates leading to 35.12%-40.72% adsorption of Cu2+. The contribution of complexation to Cu2+ adsorption were decreased from 46.61% to 17.12% as the pyrolysis temperature was increased form 400 to 600 C. Comparatively, the contribution of CTr-cations interaction were increased from 18.27% to 42.16% with the increased temperature due to the abundant aromatic C=C structure. (C) 2016 Elsevier B.V. All rights reserved.
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