Mesopore-rich badam-shell biochar for efficient adsorption of Cr(VI) from aqueous solution
Mesopore-rich badam-shell biochar for efficient adsorption of Cr(VI) from aqueous solution
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DOI：
10.1016/j.jece.2021.105634
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发表时间：
2021-05-15
影响因子：
7.7
通讯作者：
Hu, Guangzhi
中科院分区：
文献类型：
--
作者：
Jia, Xiuxiu;Zhang, Yunqiu;Hu, Guangzhi
铬(VI)是废水中常见的污染物，以往的研究多采用生物炭基材料作为吸附剂，具有良好的吸附性能。然而，一些生物炭的制备工艺复杂、不经济、可重复使用性差，限制了其实际应用。为了提高水溶液中铬(VI)的去除效果，通过热解浓磷酸(H3PO4)原位活化的BADAM壳来制备富中孔生物炭基铬(VI)吸附剂。用分配系数更全面地比较了几种吸附剂的性能，得到的最大分配系数为978.8 L g(-1)。最大吸附容量为276.6 mg g(-1)。ABSB对相对较低浓度的铬(VI)有较好的去除效果(
Cr(VI) is a common pollutant in wastewater and many previous studies using biochar-based materials as adsorbents for their well adsorption performance. However, the preparations of some biochars are complex, uneconomical, and with a poor reusability, which set limit on their practical application. Here, a mesoporous-rich biochar-based Cr(VI) adsorbent was easily prepared by pyrolyzing the badam-shell that in situ activated by concentrated phosphoric acid (H3PO4), with the aim of improving the removal effect of Cr(VI) in an aqueous solution. The partition coefficient (PC) was used to compare the performance of adsorbents more comprehensively, and the maximal PC value of the activated badam-shell biochar (ABSB) was 978.8 L g(-1). In addition, its maximum adsorption capacity was 276.6 mg g(-1). ABSB has a superior removal effect on the relatively low concentration of Cr(VI) (