利用苹果木果壳废弃物制备工程生物炭，用于高效去除废水中有毒酚类化合物。

Engineered biochar from wood apple shell waste for high-efficient removal of toxic phenolic compounds in wastewater.

机构信息

Department of Chemical Engineering, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia.

Department of Chemical Engineering, SABIC Polymer Research Centre, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia.

出版信息

Sci Rep. 2021 Jan 28;11(1):2586. doi: 10.1038/s41598-021-82277-2.

This study investigated a novel agricultural low-cost bio-waste biochar derived from wood apple fruit shell waste via the pyrolysis method, which is modified by ball milling and utilized to remove toxic phenol and chlorophenols (4-CPh and 2,4-DCPh) from contaminated aqueous media. The ball-milled wood apple fruit shell waste biochar (WAS-BC) sorbent was systematically analyzed by BET, CHN, and FTIR as well as particle size, SEM-EDS, XPS and TGA studies. The sorption equilibrium and kinetic studies exhibit that the sorption capacity was greater than 75% within the first 45 min of agitation at pH 6.0. The uptake capacity of 2,4-DCPh onto WAS-BC was greater than those of 4-CPh and phenol. Equilibrium results were consistent with the Langmuir isotherm model, while the kinetic data were best represented by the Elovich and pseudo-second-order model. The maximum uptake of phenol, 4-CPh, and 2,4-DCPh was 102.71, 172.24, and 226.55 mg/g, respectively, at 30 ± 1 °C. Thus, this study demonstrates that WAS-BC is an efficient, low-cost sorbent that can be used for the elimination of phenol and chlorophenol compounds from polluted wastewater.

本研究探索了一种新型农业低成本生物炭，它是通过热解方法从木苹果果壳废物中得到的，然后经过球磨改性，用于从受污染的水介质中去除有毒的苯酚和氯苯酚（4-CPh 和 2,4-DCPh）。通过 BET、CHN 和 FTIR 以及粒度、SEM-EDS、XPS 和 TGA 研究对球磨木苹果果壳废物生物炭（WAS-BC）吸附剂进行了系统分析。吸附平衡和动力学研究表明，在 pH 值为 6.0 的搅拌最初 45 分钟内，吸附容量大于 75%。WAS-BC 对 2,4-DCPh 的吸附容量大于对 4-CPh 和苯酚的吸附容量。平衡结果与 Langmuir 等温线模型一致，而动力学数据则最好由 Elovich 和准二级模型来表示。在 30±1°C 时，苯酚、4-CPh 和 2,4-DCPh 的最大吸附量分别为 102.71、172.24 和 226.55mg/g。因此，本研究表明，WAS-BC 是一种高效、低成本的吸附剂，可用于从污染废水中去除苯酚和氯苯酚化合物。