School of Life Sciences, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
School of Engineering, Anhui Agricultural University, 130 Changjiang West Road, Hefei 230036, PR China.
Bioresour Technol. 2015 Aug;190:13-20. doi: 10.1016/j.biortech.2015.04.048. Epub 2015 Apr 22.
Corncob, an agricultural waste, was successfully converted into a novel magnetic adsorbent by a low-temperature hydrothermal method (453K), including carbonization under saline conditions and magnetization using iron (III) salt. The resultant magnetic carbonaceous adsorbent (MCA) exhibited a porous structure with a higher specific surface area and more oxygen-containing functional groups than its carbonaceous precursor (CP), which can be attributed to the catalytic effect of Fe (III). The adsorption behaviors of both MCA and CP could be described well by Langmuir isotherm and pseudo-second-order model. The adsorption capacity for Methylene blue (MB) revealed by adsorption isotherms were 163.93mg/g on MCA and 103.09mg/g on CP, respectively. Moreover, MCA was demonstrated as a versatile adsorbent for removal of both anionic and cationic dyes, and it showed good reusability in regeneration studies. This work provides an alternative approach for effective conversion of biomass waste and application of them in pollutant removal.
玉米芯是一种农业废弃物，通过低温水热法（453K）成功转化为一种新型磁性吸附剂，包括在盐条件下碳化和用铁（III）盐进行磁化。所得的磁性碳质吸附剂（MCA）具有多孔结构，比其碳质前体（CP）具有更高的比表面积和更多的含氧官能团，这归因于 Fe（III）的催化作用。MCA 和 CP 的吸附行为都可以很好地用 Langmuir 等温线和准二级模型来描述。吸附等温线上的亚甲蓝（MB）吸附容量分别为 MCA 上的 163.93mg/g 和 CP 上的 103.09mg/g。此外，MCA 被证明是一种用于去除阴离子和阳离子染料的多功能吸附剂，并且在再生研究中表现出良好的可重复使用性。这项工作为有效转化生物质废物并将其应用于污染物去除提供了一种替代方法。
