Universidade do Estado do Rio de Janeiro, Programa de Pós-graduação em Engenharia Química, Rua São Francisco Xavier, Brazil.
Divisão de Catálise e Processos Químicos, Instituto Nacional de Tecnologia, Rio de Janeiro, Brazil.
Environ Technol. 2022 Feb;43(6):861-875. doi: 10.1080/09593330.2020.1807611. Epub 2020 Aug 20.
This work evaluates the performance of activated carbon obtained from sugarcane straw () as an adsorbent for polyaromatic hydrocarbons (PAHs) present in model wastewater. Two commercial samples of activated carbons with different textural properties were also studied for comparison. The activated carbon prepared from sugarcane straw presents a well-developed porosity with a high surface area, which was comparable to that of one of the commercial samples studied. For all the studied carbons, adsorption followed pseudo-second-order kinetics, and the higher rate constants were found for the sample for the four PAHs. Sips and Hill isotherms best fitted the adsorption equilibrium data of the PAHs on all activated carbons investigated. The activated carbon obtained from sugarcane straw () presented a higher adsorption capacity (2.08 mmol g for naphthalene, 1.26 mmol g for fluorene, 1.14 mmol g for phenanthrene, and 0.98 mmol g for fluoranthene) when compared to the commercial carbon samples studied in this work as well as for those related in the literature. It confirms that its use of as an adsorbent for PAHs is a promising application for the valorization of this biomass waste.
本工作评价了由甘蔗秸秆（）制备的活性炭作为模型废水中多环芳烃（PAHs）吸附剂的性能。还研究了两种具有不同织构性质的商业活性炭样品进行比较。由甘蔗秸秆制备的活性炭具有发达的孔隙结构和高表面积，与所研究的商业样品之一相当。对于所有研究的碳，吸附遵循伪二级动力学，对于四种 PAHs， 样品的速率常数更高。Sips 和 Hill 等温线最适合于所有研究的活性炭上 PAHs 的吸附平衡数据。与本工作研究的商业碳样品以及文献中相关的碳样品相比，由甘蔗秸秆（）获得的活性炭对萘（2.08 mmol g）、芴（1.26 mmol g）、菲（1.14 mmol g）和荧蒽（0.98 mmol g）的吸附容量更高。这证实了将其用于 PAHs 的吸附是对这种生物质废物进行增值利用的有前途的应用。
