由稻壳废弃物制备的海藻酸钠改性生物炭用于提高废水中铅的去除性能。
Alginate-modified biochar derived from rice husk waste for improvement uptake performance of lead in wastewater.
机构信息
Faculty of Environment, School of Engineering and Technology, Van Lang University, 69/68 Dang Thuy Tram Street, Ward 13, Binh Thanh District, Ho Chi Minh City, Vietnam.
Department of Chemistry, Faculty of Building Materials, Ha Noi University of Civil Engineering (HUCE), Giai Phong, Hai Ba Trung, Hanoi, 10000, Vietnam.
出版信息
Chemosphere. 2022 Nov;307(Pt 3):135956. doi: 10.1016/j.chemosphere.2022.135956. Epub 2022 Aug 11.
In this work, alginate-modified biochar derived from rice husk waste was synthesized using a simple process. The modified biochar (MBC) and rice husk biochar (RhBC) were investigated for removing Pb (II) ions in wastewater. The BET result displayed significantly improved specific surface area of MBC up to 120 m/g along with a total pore volume of 0.653 cm/g. FTIR spectrums presented the higher oxygen-contained functional groups of MBC as compared to RhBC, resulting in increasing adsorption capacity of Pb (II). MBC had higher adsorption capacity (112.3 mg/g) and faster removal rate (0.0081 g mg min) than those of RhBC (41.2 mg/g and 0.00025 g mg min). Modified RhBC can remove more than 99% of Pb (II) from wastewater and it could be utilized for three cycles with a removal performance of over 90%. In addition, the Pb adsorption mechanism by using MBC was proposed and the practical application of MBC for the treatment of wastewater in Vietnam was discussed.
在这项工作中，使用简单的方法合成了一种由稻壳废物制备的海藻酸钠改性生物炭。研究了改性生物炭（MBC）和稻壳生物炭（RhBC）对废水中 Pb（II）离子的去除效果。BET 结果显示，MBC 的比表面积显著提高至 120 m/g，总孔体积为 0.653 cm/g。FTIR 谱图显示，MBC 含氧官能团的含量高于 RhBC，这导致了其对 Pb（II）的吸附容量增加。MBC 的吸附容量（112.3 mg/g）和去除速率（0.0081 g mg min）均高于 RhBC（41.2 mg/g 和 0.00025 g mg min）。改性后的 RhBC 可以去除废水中超过 99%的 Pb（II），并且可以重复使用三次，去除率仍超过 90%。此外，还提出了 MBC 吸附 Pb 的机制，并讨论了 MBC 在越南废水处理中的实际应用。
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