Transforming goat manure into surface-loaded cobalt/biochar as PMS activator for highly efficient ciprofloxacin degradation
Transforming goat manure into surface-loaded cobalt/biochar as PMS activator for highly efficient ciprofloxacin degradation
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DOI：
10.1016/j.cej.2020.125063
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发表时间：
2020-09-01
影响因子：
15.1
通讯作者：
Zhai, Shangru
中科院分区：
文献类型：
--
作者：
Luo, Junmei;Bo, Shufeng;Zhai, Shangru
羊粪的过量排放对环境造成了严重的负担，因此如何将这类废物转化为功能材料具有现实意义，但仍然具有挑战性。本文首次以浸渍钴的羊粪废弃物为原料，通过碳化制备了表面负载钴/生物炭（Co-GMC-900）。Co-GMC-900在活化过一硫酸盐（PMS）降解环丙沙星（CIP）方面表现出优异的性能，在30 min内可去除96.5%的CIP。此外，在循环实验中，Co-GMC-900表现出稳定的稳定性，这是由于其优异的磁性、羊粪固有的椭球体以及钴纳米颗粒与石墨化生物炭网络之间的相互作用的协同作用。在一系列的表征分析，碳化温度在剪裁的物理化学性能（晶体结构，石墨化度，C=O基团的比例和比表面积）的复合材料中起着至关重要的作用。结果表明，CIP的降解过程是自由基过程（SO 4中心点-、中心点OH和O-2（中心点-））与非自由基过程（O-1（2）和电荷转移）共同作用的结果，其中自由基过程对CIP的降解起主要作用，Co-0在自由基过程中起主导作用。有利的是，这项工作可能会提供很大的希望，利用山羊粪便废物在一个有价值的方式，同时实现环境修复。
The excessive discharge of goat manure has placed a serious burden on the environment and accordingly how to transform this type of waste into functional materials is of practical significance yet remains challenging. Herein, surface-loaded cobalt/biochar (Co-GMC-900) was successfully prepared for the first time by carbonizing Co-impregnated goat manure waste. The Co-GMC-900 exhibited excellent performance in activating peroxymonosulfate (PMS) to degrade ciprofloxacin (CIP), which could remove 96.5% of CIP within 30 min. Additionally, in the cycle experiments, the Co-GMC-900 presented robust stability due to the synergy of excellent magnetism, inherent ellipsoid of goat manure and strengthened interactions between cobalt nanoparticles and graphitized biochar network. In the light of a series of characterization analyses, carbonization temperature played a crucial role in tailoring the physicochemical properties (crystal structure, graphitized degree, the ratio of C=O groups and specific surface area) of composites. Based on detected active species, radical process (SO4 center dot-, center dot OH and O-2(center dot-)) in conjunction with the non-radical process (O-1(2) and charge transfer) resulted in the CIP degradation, in which the radical process mainly contributed to the degradation process, and Co-0 played a leading role in the radical process. Favorably, this work might provide great promise for utilizing goat manure waste in a valuable manner and simultaneously achieving environmental remediation.