Author
Listed:
- Ronghai Zhang
(College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China
National Technology Center, Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530004, China)
- Yudao Chen
(College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541006, China)
- Shudi Li
(National Technology Center, Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530004, China)
- Zhuangmian Wei
(National Technology Center, Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530004, China)
- He Huang
(National Technology Center, Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530004, China)
- Tian Xie
(National Technology Center, Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530004, China)
Abstract
In this study, biochar (BC) was prepared from bagasse and then successfully loaded with nanoscale zerovalent iron (nZVI) to produce BC-supported nZVI, termed nZVI@BC. Satisfactory results were obtained using a nZVI@BC-activated persulfate (PS), termed nZVI@BC/PS, to remediate total petroleum hydrocarbons (TPH)-contaminated water. The effects of three influencing factors—the dosage of nZVI@BC, D nZVI@BC , the concentration of PS, C PS , and the initial pH, pH i —on TPH removal were examined through single-factor and batch tests. The results show the following. Each factor considerably influenced the performance of the prepared nZVI@BC/PS reaction system in removing TPH. The TPH degradation process conformed to a first-order kinetic model. The response surface method (RSM) was used in tandem with a Box–Behnken design to optimise the variables involved in TPH degradation. The three influencing variables (i.e., D nZVI@BC , C PS , and pH i ) were set in the range of 0.4–1.0 g/L, 20–160 g/L, and 2.21–9.42, respectively, during the experiment. An optimised quadratic model used to fit the experimental data displayed a high level of significance ( p < 0.0001) with a very high regression value (R 2 = 0.9906; adjusted R 2 = 0.9786). Analyses of regression and variance revealed that the quadratic model sufficiently explains the TPH degradation rate. An electron paramagnetic resonance (EPR) spectroscopic analysis of the nZVI@BC/PS system revealed that SO 4 − ·, ·OH, O 2 − ·, and 1 O 2 participated in the activation and degradation processes. The results of this study show that nZVI@BC-activated PS systems possess great potential for applications in TPH-contaminated wastewater treatment and environmentally sustainable development.
Suggested Citation
Ronghai Zhang & Yudao Chen & Shudi Li & Zhuangmian Wei & He Huang & Tian Xie, 2022.
"Remediation and Optimisation of Petroleum Hydrocarbon Degradation in Contaminated Water by Persulfate Activated with Bagasse Biochar-Supported Nanoscale Zerovalent Iron,"
Sustainability, MDPI, vol. 14(15), pages 1-17, July.
Handle:
RePEc:gam:jsusta:v:14:y:2022:i:15:p:9324-:d:875408
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