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首页> 外文期刊>The Science of the Total Environment >Removal of copper ions from aqueous solution using low temperature biochar derived from the pyrolysis of municipal solid waste
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Removal of copper ions from aqueous solution using low temperature biochar derived from the pyrolysis of municipal solid waste

机译：使用低温生物炭从水溶液中除去从城市固体废物的热解的水溶液中除去铜离子

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摘要

Sustainable methods to produce filter materials are needed to remove a variety of pollutants found in water including organic compounds, heavy metals, and other harmful inorganic and biological contaminants. This study focuses on the removal of Cu(II) from copper aqueous solutions using non-activated char derived fromthe pyrolysis of mixed municipal discarded materials (MMDM) using a new heat pipe-based pyrolysis reactor. Adsorption experiments were conducted by adding the char to copper solutions of varying concentration (50-250 mg/L) at a constant temperature of 30 degrees C. The effect of pH on copper adsorption onto the char was also investigated in the range of pH 3 to 6. Copper removal using the char was found to be heavily dependent on pH, adsorption was observed to decrease below a pH of 4.5. However, the initial copper concentration had a little effect on the sorption of copper at high concentration solutions (above 100 mg/L). Overall, the biochar showed an effective copper adsorption capacity (4-5 mg/g) when using copper solutions with a concentration below100 mg/L and pH 4.5. Copper removal using the char tended to follow the pseudo second order kinetic model. Langmuir isothermal model was shown to be the closest fitting isothermusing the linearized Langmuir equation. However, the variety of feedstock used to produce the char led to a variation in results compared to other studies of more specific feedstocks. (c) 2019 The Author(s). Published by Elsevier B.V.
机译：需要生产过滤材料的可持续方法来除去水中发现的各种污染物，包括有机化合物，重金属和其他有害无机和生物污染物。该研究侧重于使用新的热管基热解反应器使用从混合的城市废弃物（MMDM）热解的非活化炭，从铜水溶液中除去Cu（II）。通过在恒定温度为30℃的恒定温度下加入铜溶液来进行吸附实验。在pH 3的范围内还研究了pH对铜吸附的铜吸附的影响对于6，发现使用铜的铜除去依赖于pH，观察到吸附以降低4.5的pH值。然而，初始铜浓度对高浓度溶液（高于100mg / L）的铜的吸附有点效果。总的来说，在使用浓度低于100mg / L和pH> 4.5的铜溶液时，Biochar显示出有效的铜吸附容量（4-5mg / g）。使用CHAR倾向于遵循伪二阶动力学模型的铜。 Langmuir等温模型被证明是最接近的线性化Langmuir方程的安装等温。然而，与其他更具特定原料的其他研究相比，用于产生CHAR的原料的各种原料导致了结果的变化。 （c）2019年作者。由elsevier b.v出版。

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