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首页> 外文会议>International Conference on Application of Materials Science and Environmental Materials >Comparative study on the adsorption of copper and cadmium by corn-straw-derived biochar pyrolyzed at different temperatures
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Comparative study on the adsorption of copper and cadmium by corn-straw-derived biochar pyrolyzed at different temperatures

机译：玉米秸秆衍生的生物施吸附铜和镉的比较研究在不同温度下热解

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摘要

Biochar (BC) has been widely studied for its ability to remove heavy metals from aqueous solutions. In this study, biochars derived from corn straw were prepared by pyrolysis at 300, 400, 500 and 700 °C. The biochar prepared at a higher pyrolytic temperature, particularly those at 700 °C, had a higher aqeuous Cu~(2+) and Cd~(2+) adsorption capacity (BC700, 117.63 mg/g for Cu~(2+) and 110.76 mg/g for Cd~(2+)). Langmuir isotherm and both pseudo-first-order and pseudo-second-order kinetic models fit well with Cu~(2+) adsorption on biochars. Freundlich model and pseudo-second-order kinetic model are a better fit for the Cd~(2+) adsorption.
机译：BioChar（BC）已被广泛研究其从水溶液中除去重金属的能力。在该研究中，通过在300,400,500和700℃下热解制备源自玉米秸秆的生物脉。在较高的热解温中制备的生物炭，特别是在700℃下的热解温，具有较高的浓度Cu〜（2+）和Cd〜（2+）吸附能力（BC700,117.63mg / g，用于Cu〜（2+）和CD〜（2+）的110.76 mg / g）。 Langmuir等温线和伪一阶和伪二阶动力学模型适合Biochars的Cu〜（2+）吸附。 Freundlich模型和伪二阶动力学模型对CD〜（2+）吸附更好。

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