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首页> 外文期刊>International Journal of Environmental Science and Technology >High efficacy on diclofenac removal by activated carbon produced from potato peel waste
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High efficacy on diclofenac removal by activated carbon produced from potato peel waste

机译：马铃薯皮屑产生的活性炭对双氯芬酸的去除效率高

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摘要

In the present study, a novel porous carbon obtained by K2CO3 activation of potato peel waste under optimized conditions was applied for the first time as liquid-phase adsorbent of sodium diclofenac in parallel with a commercial activated carbon. The biomass-activated carbon presented an apparent surface area of 866 m(2) g(-1) and well-developed microporous structure with a large amount of ultramicropores. The obtained carbon presented leaching and ecotoxicological properties compatible with its safe application to aqueous medium. Kinetic data of laboratory-made and commercial sample were best fitted by the pseudo-second-order model. The commercial carbon presented higher uptake of diclofenac, but the biomass carbon presented the higher adsorption rate which was associated with its higher hydrophilic nature which favoured external mass transfer. Both adsorbents presented adsorption isotherms that were best fitted by Langmuir model. The biomass carbon and the commercial carbon presented adsorption monolayer capacities of 69 and 146 mg g(-1), and Langmuir constants of 0.38 and 1.02 L mg(-1), respectively. The better performance of the commercial sample was related to its slightly higher micropore volume, but the most remarkable effect was the competition of water molecules in the biomass carbon.
机译：在本研究中，首次将通过在最佳条件下用K2CO3活化马铃薯皮废料获得的新型多孔碳作为双氯芬酸钠的液相吸附剂，与市售活性炭并行使用。生物量活化的碳表现出866 m（2）g（-1）的表观表面积和发达的微孔结构，具有大量的超微孔。所获得的碳具有浸出和生态毒理学特性，与其在水性介质中的安全应用兼容。伪二级模型可以很好地拟合实验室和商业样品的动力学数据。商业碳表现出较高的双氯芬酸吸收，而生物质碳表现出较高的吸附速率，这与其较高的亲水性有关，这有利于外部传质。两种吸附剂均表现出吸附等温线，这是Langmuir模型最适合的。生物量碳和商业碳的吸附单层容量分别为69和146 mg g（-1），Langmuir常数分别为0.38和1.02 L mg（-1）。商业样品的更好性能与其稍高的微孔体积有关，但最显着的影响是生物分子碳中水分子的竞争。

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