We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Insight into Naphthalene Degradation by Nano-calcium Peroxide in Fe(II)-Citric Acid Catalytic Environment.
- Authors
Liu, Yulong; Sheng, Xianxian; Zhou, Zhikang; Wang, Peng; Lu, Zhanpeng; Dong, Jiaqi; Lyu, Shuguang
- Abstract
In this study, nano-calcium peroxide (nCP) was synthesized successfully and characterized by SEM, TEM, XRD, EDS, and BET techniques. The nCP was confirmed in nano-size with good dispersion, large specific surface area, high purity, and performed better than commercial calcium peroxide (CP) in naphthalene (NAP) removal when catalyzed by Fe(II). At the nCP/Fe(II)/NAP molar ratio of 15/20/1, 81.6% of NAP was degraded within 180 min, and this value was increased to 95.4% at the nCP/Fe(II)/citric acid (CA)/NAP molar ratio of 15/20/4/1 under the same conditions, suggesting that CA could effectively improve NAP removal. Further experiments were conducted to investigate the effects of reagents (nCP, Fe(II), and CA) dosage on NAP degradation. The results of probe experiments, electro-spin resonance spectrometer (EPR) detection and scavenging tests confirmed the presence of HO•, O2−•, and 1O2 in the nCP/Fe(II)/CA system, and HO• was the dominant radical for NAP degradation. According to the intermediates detected by GC–MS, three possible NAP degradation pathways were postulated. Finally, the NAP degradation under different water matrixes (pH, Cl−, and HCO3−) were explored, and the achievement of 97.7% removal of NAP in actual groundwater demonstrated that the nCP/Fe(II)/CA system has great potential for the remediation of NAP-contaminated groundwater.
- Subjects
NAPHTHALENE; GROUNDWATER remediation; PEROXIDES; SURFACE area; GAS chromatography/Mass spectrometry (GC-MS); GROUNDWATER purification; LEAD removal (Water purification)
- Publication
Water, Air & Soil Pollution, 2021, Vol 232, Issue 12, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-021-05457-w