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首页> 外文期刊>RSC Advances >Physical modification of biochar to expose the inner pores and their functional groups to enhance lead adsorption
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Physical modification of biochar to expose the inner pores and their functional groups to enhance lead adsorption

机译：对生物炭进行物理修饰以暴露内部孔及其官能团，以增强铅的吸附

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Biochars have been successfully used to treat wastewater and contaminated soils. The efficiency of biochar as a biosorbent of heavy metals can be increased by reducing the particle size, exposing the inner pores and their functional groups. In this study, the empty fruit bunch biochar (EFBB) of oil palm was separated into three particle sizes, fine (F-EFBB < 50 μm), medium (M-EFBB 250–500 μm) and coarse (C-EFBB > 2000 μm) to compare their physical and chemical characteristics and their adsorption capacity for lead. Results revealed that the F-EFBB had greater surface area and exposed more micropores compared to the other particle sizes. Similarly, the F-EFBB had the most oxygen containing functional groups, CEC, and negative charges as measured by the zeta potential. The F-EFBB had the highest adsorption capacity for Pb, followed by M-EFBB and C-EFBB with the lowest. Therefore, the F-EFBB are able to adsorb more heavy metals as compared to M-EFBB and C-EFBB, as suggested by the more favourable physical and chemical characteristics.
机译：生物炭已成功用于处理废水和受污染的土壤。可通过减小粒径，暴露内孔及其官能团来提高生物炭作为重金属生物吸附剂的效率。在这项研究中，将油棕的空果串生物炭（EFBB）分为三种粒径：细颗粒（F-EFBB <50μm），中颗粒（M-EFBB 250–500μm）和粗颗粒（C-EFBB> 2000） （μm），以比较其理化特性和对铅的吸附能力。结果显示，与其他粒径相比，F-EFBB具有更大的表面积并暴露出更多的微孔。同样，F-EFBB具有最多的含氧官能团，CEC和负电荷（通过Zeta电势测量）。 F-EFBB对Pb的吸附量最高，其次是M-EFBB和C-EFBB。因此，与更有利的物理和化学特性表明，与M-EFBB和C-EFBB相比，F-EFBB能够吸附更多的重金属。

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