DPF soot as an adsorbent for Cu(II), Cd(II), and Cr(VI) compared with commercial activated carbon
DPF soot as an adsorbent for Cu(II), Cd(II), and Cr(VI) compared with commercial activated carbon
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DOI：
10.1007/s11356-017-1122-8
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发表时间：
2018-03-01
影响因子：
5.8
通讯作者：
Fox, John
中科院分区：
文献类型：
--
作者：
Yang, Kun;Fox, John
利用柴油微粒过滤器（DPF）回收的碳烟作为废水中镉、铬、铜等重金属的潜在吸附剂进行了研究。结果与粉末活性炭（PAC）的吸附性能进行了比较。煤烟对重金属的吸收能力高于聚丙烯腈，对煤烟和聚丙烯腈的热力学研究结果表明，两者的吸附过程都是放热的。对单体系和二元体系进行了吸附研究。单系统的数据最好采用单层模型和Langmuir等温线模型。二元体系的吸附机理更为复杂。动力学研究表明，吸附过程在前1 h内发生迅速，用拟二阶模型可以很好地描述吸附过程。SEM-EDS分析表明，烟尘具有较高的孔隙率和比表面积。FTIR和IEP值显示，羧基和羟基官能团是烟灰和PAC的主要表面官能团。吸附可以用范德华力和静电力来解释。
The use of carbon soot recovered from diesel particulate filters (DPF) has been investigated as a potential adsorbent for heavy metals including cadmium, chromium, and copper from wastewater. Results were compared with the adsorption performance of powder activated carbon (PAC). The uptake capacity of heavy metals for soot was found to be higher than PAC. And the thermodynamic study result for both soot and PAC indicated the adsorption procedures are exothermic. The adsorption studies were carried out for both single and binary systems. The data are best modeled by the monolayer model and Langmuir isotherm model for single systems. The adsorption mechanisms are more complex for binary systems. The kinetic studies indicated the adsorption happens rapidly within the first 1 h, and the results can be best modeled by pseudo-second-order model. The SEM-EDS analysis revealed the soot possesses higher porosity and surface area. Carboxylic and hydroxyl functional groups are the predominant surface functional group on both soot and PAC as revealed by FTIR and IEP values. The adsorption can be explained by both Van Der Waals force and electrostatic force.