Highly Efficient, Stable, and Recyclable Hydrogen Manganese Oxide/Cellulose Film for the Extraction of Lithium from Seawater
Highly Efficient, Stable, and Recyclable Hydrogen Manganese Oxide/Cellulose Film for the Extraction of Lithium from Seawater
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DOI：
10.1021/acsami.9b21612
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发表时间：
2020-02-26
影响因子：
9.5
通讯作者：
Wang, Wei
中科院分区：
文献类型：
--
作者：
Tang, Lian;Huang, Shaodong;Wang, Wei
随着电动汽车和电子产品市场的迅速扩张，从海水中提取锂作为满足锂需求的一种手段引起了人们的广泛关注。本文研究了一种可再生、可回收的氧化锰氢改性纤维素膜，并对其从含锂水溶液中提取锂进行了研究。对多孔膜进行了表征，考察了其对水溶液（ppm水平）和海水（ppb水平）中锂的萃取效果和选择性。由于HMO/纤维素薄膜具有多维孔隙度和亲水性，其Li+吸附能力（21.6 mg g(-1) HMO）高于HMO/聚合物（例如聚氯乙烯或聚偏氟乙烯）薄膜，这些薄膜已在锂提取方面进行了文献研究。基于拟二阶模型的动力学分析表明，HMO/纤维素膜的Li+提取率是单独使用HMO颗粒的3倍(即0.075;cf. 0.023 g mg（-1) h(-1)）。此外，HMO/纤维素膜在海水中对Li+表现出很高的选择性，Li+的提取率达到99%，而海水中存在的其他离子（即Sr2+， K+和Ca2+）的提取率为99%
The extraction of lithium from seawater has attracted much interest as a means to meet increasing demand for lithium with the rapid expansion of the electric vehicle and electronics markets. Herein, a renewable and recyclable hydrogen manganese oxide (HMO)-modified cellulose film was developed and investigated toward the extraction of lithium from lithium containing aqueous solutions. The porous film was characterized, and its extraction efficacy and selectivity toward lithium from an aqueous solution (ppm level) and seawater (ppb level) were investigated. The HMO/cellulose film exhibited a higher Li+ adsorption capacity (21.6 mg g(-1) HMO) than HMO/polymer (e.g., poly(vinyl chloride) or poly(vinylidene fluoride)) films, which have been examined in the literature for lithium extraction, because of its multidimensional porosity and hydrophilicity. The kinetics analysis based on a pseudo-second-order model indicated that the Li+ extraction rate of the HMO/cellulose film was 3 times higher than that achieved by the HMO particle alone (i.e., 0.075; cf. 0.023 g mg(-1) h(-1)). Furthermore, the HMO/cellulose film displayed high selectivity for Li+ when exposed to seawater-the extraction of Li+ reached 99%, whereas that of the other ions present in seawater (i.e., Sr2+, K+, and Ca2+) was