改性海藻酸钠气凝胶的制备及其在去除废水中铅离子和镉离子方面的应用。
Preparation of modified sodium alginate aerogel and its application in removing lead and cadmium ions in wastewater.
作者信息
Wang Zhuqing, Wu Shasha, Zhang Yuenan, Miao Lijing, Zhang Yujie, Wu Aiguo
机构信息
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.
出版信息
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。
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