Wang Zhuqing, Wu Shasha, Zhang Yuenan, Miao Lijing, Zhang Yujie, Wu Aiguo
Anhui Key Laboratory of Photoelectric-Magnetic Functional Materials, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246133, China.
Anhui Key Laboratory of Photoelectric-Magnetic Functional Materials, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246133, China; Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
Int J Biol Macromol. 2020 Aug 15;157:687-694. doi: 10.1016/j.ijbiomac.2019.11.228. Epub 2019 Nov 30.
A low-cost, environment-friendly sodium alginate-meso-2,3-dimercaptosuccinic acid hybrid aerogel (SA-DMSA) was synthesized by simple chemical grafting and vacuum freeze-drying method and used to remove heavy metal ions in wastewater. The as-prepared SA-DMSA showed high affinity for heavy metal ions, such as Pb, Cd, Cu, Cr, and Co, and can remove >90% of the metal ions from the corresponding solution. SA-DMSA also exhibited high selectivity to Pb and Cd, and the maximum adsorption capacities for Pb and Cd reached 116.4 and 91.2 mg/g, respectively. The SA-DMSA adsorbent can be regenerated by a simple one-step acid washing, and the adsorption performance remained stable after repeated use. Given its low-cost and easy-to-obtain raw materials, simple preparation process, and simple regeneration process of the adsorbent, SA-DMSA has broad application prospects in the treatment of low-concentration heavy metal ions, especially for wastewater containing Pb and Cd.
通过简单的化学接枝和真空冷冻干燥法合成了一种低成本、环境友好的海藻酸钠-间-2,3-二巯基丁二酸杂化气凝胶（SA-DMSA），并用于去除废水中的重金属离子。所制备的SA-DMSA对Pb、Cd、Cu、Cr和Co等重金属离子具有高亲和力，能够从相应溶液中去除>90%的金属离子。SA-DMSA对Pb和Cd还表现出高选择性，对Pb和Cd的最大吸附容量分别达到116.4和91.2 mg/g。SA-DMSA吸附剂可通过简单的一步酸洗进行再生，重复使用后吸附性能保持稳定。鉴于其原材料成本低且易于获得、制备过程简单以及吸附剂再生过程简单，SA-DMSA在处理低浓度重金属离子，特别是含Pb和Cd的废水方面具有广阔的应用前景。
