Efficient recovery of Cr(vi) from electroplating wastewater by iron-modified sludge-based hollow-structured porous carbon: coexistence effects and competition for adsorption.
Efficient recovery of Cr(vi) from electroplating wastewater by iron-modified sludge-based hollow-structured porous carbon: coexistence effects and competition for adsorption.
复制标题
铁改性污泥基中空结构多孔炭高效回收电镀废水中的Cr(vi)：共存效应和竞争吸附
DOI：
10.1039/d1ra06969a
复制
发表时间：
2021-11-17
期刊：
影响因子：
3.9
通讯作者：
Kang, Xiaorong
中科院分区：
文献类型：
--
作者：
Cheng, Han;Liu, Yali;Li, Xin;He, Haidong;Kang, Xiaorong
本工作以城市污水污泥和杂交鹅掌木树叶为原料制备多孔炭，并用铁离子(Fe@LS-BC)对水溶液中的单组分体系中的六价铬进行了改性，并与甲基橙(MO)进行了竞争吸附。铁离子修饰的多孔炭(Fe@LS-BC)对六价铬的去除效率高于污泥和杂交木树叶共热解制备的多孔炭。Fe元素的加入提高了材料氧化还原Cr(VI)的能力，同时赋予了多孔炭磁性，提高了多孔炭的可重复使用性。另一方面，Fe@LS-BC具有较好的孔容，有利于材料与六价铬离子的接触。最大吸附容量为0.33mmolg−1，单组分和二元体系对六价铬的吸附实验结果符合Langmuir-Freundlich模型。当MO的浓度分别为0.2和0.8mmolL−1时，二元体系对铬(VI)的最大吸附容量分别为0.35和0.46mmolg−1。MO分子上带正电荷的N-CH~(3+)促进了HCrO_4-−、CrO_4-−与Fe@LS-BC之间的静电吸附，提高了对六价铬的吸附电位。
In the present work, porous carbon was made from sewage sludge and hybrid liriodendron leaves, and modified with iron ions (Fe@LS-BC) carried out on Cr(vi) in aqueous solution from a single-component system and in competitive biosorption with methyl orange (MO) from a binary-component system. The iron ion-modified porous carbon (Fe@LS-BC) showed higher efficiency in the removal of Cr(vi) compared to porous carbon prepared by the co-pyrolysis of sludge and hybrid liriodendron leaves. The incorporation of the Fe element improved the ability of the material to redox Cr(vi), while imparting magnetic characteristics to the porous carbon and improving the reusability of the porous carbon. On the other hand, Fe@LS-BC exhibited a better pore volume, facilitating the contact of the material with Cr(vi) ions. The highest adsorption capacity was 0.33 mmol g−1, and the adsorption experimental results for the single-component and binary-component systems of Cr(vi) matched well with the Langmuir–Freundlich models. When the concentration of MO was 0.2 and 0.8 mmol L−1, respectively, the highest adsorption capacity of Cr(vi) was 0.35 and 0.46 mmol g−1 in the binary system. The positively charged N–CH3+ on the MO molecule promoted the electrostatic adsorption between HCrO4−, CrO42−, and Fe@LS-BC, and increased the adsorption potential of Cr(vi).
登录
查看更多内容
影响因子：
10.9
作者：
Dastgheib, SA;Rockstraw, DA
通讯作者：
Rockstraw, DA
影响因子：
20.1
作者：
Gu, Hongbo;Gao, Chong;Guo, Zhanhu
通讯作者：
Guo, Zhanhu
DOI：
10.1016/j.colsurfa.2018.04.054
发表时间：
2018-08-20
影响因子：
5.2
作者：
Feng, Zhengyuan;Chen, Nan;Gao, Yu
通讯作者：
Gao, Yu
影响因子：
9.9
作者：
Basaldella, Elena I.;Vazquez, Patricia G.;Caputo, Domenico
通讯作者：
Caputo, Domenico
影响因子：
20.1
作者：
Gorgun, Neslihan;Ozer, Caglar;Polat, Kinyas
通讯作者：
Polat, Kinyas