Zhejiang Provincial Key Lab for Chemical and Biological Processing Technology of Farm Product, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China.
Zhejiang Provincial Key Lab for Chemical and Biological Processing Technology of Farm Product, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China; Department of Agroindustry, Faculty of Agriculture and Food Processing, Mean Chey University, Serei Saophoan 01252, Banteay Meanchey, Cambodia.
Bioresour Technol. 2018 Aug;261:257-264. doi: 10.1016/j.biortech.2018.03.108. Epub 2018 Mar 31.
A series of bamboo hydrochars were prepared through acid-assisted and two-stage hydrothermal carbonization, characterized and evaluated for the adsorption of Congo red and 2-naphthol in aqueous solutions. The hydrochars have rough surfaces with BET surface areas of 6.77-57.74 m/g and oxygen-rich functional groups. The additives in feed water revealed critical influences on the physical-chemical and adsorption properties of the hydrochars. The hydrochars can adsorb the two organics effectively, the highest adsorption capacities for Congo red and 2-naphthol are 90.51 and 72.93 mg/g, respectively, at 0.1 mg/mL and 298 K. The adsorption of the two organics on the selected hydrochars is a spontaneous and mainly physical adsorption process. 95% and 92% of the adsorption equilibrium could be accomplished in one hour for Congo red and 2-naphthol on the selected hydrochars, respectively. This study provides references for the production and application of hydrochars as efficient adsorbents in wastewater treatment.
一系列竹基水炭通过酸辅助和两段水热碳化制备而成，对其在水溶液中对刚果红和 2-萘酚的吸附进行了特征描述和评价。水炭具有粗糙的表面，BET 比表面积为 6.77-57.74 m/g，含有丰富的含氧官能团。进料水中的添加剂对水炭的物理化学和吸附性能有重要影响。水炭能有效吸附这两种有机物，在 0.1 mg/mL 和 298 K 时，对刚果红和 2-萘酚的最大吸附容量分别为 90.51 和 72.93 mg/g。这两种有机物在所选水炭上的吸附是自发的，主要是物理吸附过程。刚果红和 2-萘酚在所选水炭上的吸附平衡在 1 小时内即可达到 95%和 92%。本研究为水炭作为高效废水处理吸附剂的生产和应用提供了参考。
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