Highly efficient and rapid purification of organic dye wastewater using lignin-derived hierarchical porous carbon

吸附 废水 化学工程 多孔性 木质素 材料科学 活性炭 水处理 废物管理 制浆造纸工业 化学 环境科学 有机化学 环境工程 工程类
作者
Shiyun Zhu,Jun Xu,Bin Wang,Jin Xie,Guangdong Ying,Jinpeng Li,Zheng Cheng,Jun Li,Kefu Chen
出处
期刊:Journal of Colloid and Interface Science [Elsevier]
卷期号:625: 158-168 被引量:33
标识
DOI:10.1016/j.jcis.2022.06.019
摘要

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 m2/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.
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