High adsorption capacity and the key role of carbonate groups for heavy metal ion removal by basic aluminum carbonate porous nanospheres
High adsorption capacity and the key role of carbonate groups for heavy metal ion removal by basic aluminum carbonate porous nanospheres
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DOI：
10.1039/c2jm34138g
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发表时间：
2012-08
影响因子：
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通讯作者：
Changyan Cao;Ping-Xing Li;Jin Qu;Zhifeng Dou;Wen-sheng Yan;Junfa Zhu;Ziyu Wu;Weiguo Song
中科院分区：
文献类型：
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作者：
Changyan Cao;Ping-Xing Li;Jin Qu;Zhifeng Dou;Wen-sheng Yan;Junfa Zhu;Ziyu Wu;Weiguo Song
A fast, low-cost and scalable method was developed to prepare basic aluminum carbonate (Al(OH)CO3) porous nanospheres via a microwave-assisted solvothermal process in 5 min. All chemicals used were low-cost and environmentally benign. These Al(OH)CO3 nanospheres had an extremely large surface area (484 m2 g−1), abundant carbonate groups, and showed superb adsorption properties with maximum capacities of 170 mg g−1 and 60 mg g−1 for As(V) and Cr(VI) at pH 7, respectively. These values were obviously higher than that of many other nanomaterials. In addition, for practical applications, 5 mg Al(OH)CO3 nanospheres could purify 6 kg As(V) contaminated water, reducing the As(V) concentration from 100 ppb to less than 10 ppb. A new adsorption mechanism involving ion exchange between carbonate groups and As(V) or Cr(VI) species was proposed and confirmed.
