Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China; State Key Laboratory of Biobased Material and Green Papermaking, Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
Int J Biol Macromol. 2019 Jul 1;132:478-486. doi: 10.1016/j.ijbiomac.2019.03.222. Epub 2019 Mar 31.
We report an ingenious technique to prepare magnetic alkaline lignin-dopamine nanoparticles (AL-DA/FeO NPs). Alkaline lignin, a kind of abundant waste from agriculture, pulping and bio-energy industry, was functionalized by the conjugation with DA molecules and nano-precipitation method. Benefiting from the three-dimensional network of lignin and mussel-inspired DA molecules, chromium(III) can be effectively removed by physisorption and chemisorption. The maximum Cr(III) adsorption capacity of AL-DA/FeO NPs was found to be 44.56 mg/g, which was among the highest of previously reported biomass-based Cr(III) adsorbents. Moreover, sensitive magnetic responsiveness (24.6 emu/g) of AL-DA/FeO NPs can be more helpful in recycling (over 90% recycled within 2 min) and multiple reusing. The preparation of this low-cost, high adsorptive capacity and good ecofriendly lignin-based nano-adsorbent is expected to become a sustainable technology to simultaneously achieve the wastewater reutilization from pulping and bio-energy industry and purification of other modern industries.
我们报告了一种巧妙的技术，用于制备磁性堿性木质素-多巴胺纳米粒子（AL-DA/FeO NPs）。堿性木质素是一种来自农业、制浆和生物能源产业的丰富废物，通过与 DA 分子的共轭和纳米沉淀方法进行了功能化。受益于木质素的三维网络和贻贝启发的 DA 分子，铬（III）可以通过物理吸附和化学吸附有效地去除。AL-DA/FeO NPs 的最大 Cr(III)吸附容量被发现为 44.56mg/g，这在以前报道的基于生物质的 Cr(III)吸附剂中属于最高水平之一。此外，AL-DA/FeO NPs 的敏感磁响应性（24.6 emu/g）更有助于回收（在 2 分钟内回收超过 90%）和多次重复使用。这种低成本、高吸附容量和良好环保性的木质素基纳米吸附剂的制备有望成为一种可持续技术，可同时实现制浆和生物能源产业的废水再利用和其他现代产业的净化。
