State Key Laboratory of Pulp and Paper Engineering, Plant Fiber Material Science Research Center, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China.
State Key Laboratory of Pulp and Paper Engineering, Plant Fiber Material Science Research Center, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China; Qingyuan Huayuan Institute of Science and Technology Collaborative Innovation Co., Ltd, Qingyuan 511500, China.
J Colloid Interface Sci. 2022 Nov;625:158-168. doi: 10.1016/j.jcis.2022.06.019. Epub 2022 Jun 7.
Coating manufacturing, textile processing, and plastic industry have led to dramatical release levels of hazardous organic dye pollutants threatening public health and the environment. To solve this problem, porous carbon materials are being developed following with the United Nations initiative on water purification. However, conventional porous carbon materials face many challenges, such as limited removal rates, low adsorption capacity, and high chemicals consumption, hampering their large-scale utilization in dye wastewater treatment. Herein, we demonstrate a high-performance lignin-derived hierarchical porous carbon (LHPC) material directly prepared from renewable lignin through a low-cost activation procedure. The large specific surface area (1824 m/g) enables the rapid and effective adsorption of organic dyes. Therefore, the LHPC exhibits an ultrahigh adsorption ability (1980.63 mg/g) and removal rate (99.03% in 10 min) for Azure B, superior to that of other adsorbents. Additionally, the LHPC adsorbent, organic dyes, eluting agent, and water all can be recycled and reused in a designed close-looped system. Its high removal ability and rate, strong retrievability, low-cost and scalable production combined with high dyes adsorption universality, positions our LHPC as a promising commercial adsorbent candidate for the purification of harmful organic dye wastewater, especially for heavily polluted area with an insistent demand for clear water.
涂层制造、纺织品加工和塑料工业导致了危险有机染料污染物的大量释放，威胁着公众健康和环境。为了解决这个问题，联合国启动了净水倡议，正在开发多孔碳材料。然而，传统的多孔碳材料面临着许多挑战，如去除率有限、吸附容量低和高化学品消耗，这阻碍了它们在染料废水处理中的大规模应用。在此，我们通过一种低成本的活化程序，直接从可再生木质素制备出高性能的木质素衍生分级多孔碳（LHPC）材料。大的比表面积（1824 m/g）使有机染料能够快速有效地被吸附。因此，LHPC 对 Azure B 表现出超高的吸附能力（1980.63 mg/g）和去除率（10 分钟内 99.03%），优于其他吸附剂。此外，LHPC 吸附剂、有机染料、洗脱剂和水都可以在设计的闭环系统中回收和再利用。其高去除能力和速率、强可回收性、低成本和可扩展性生产，结合高染料吸附通用性，使我们的 LHPC 成为一种有前途的商业吸附剂候选物，可用于净化有害有机染料废水，特别是对水污染严重且迫切需要清水的地区。
