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- Title
Cu<sub>2</sub>O/CuO/BC复合材料活化PMS降解TC.
- Authors
吴德勇; 苏积珊
- Abstract
Herein,biochar (BC) was prepared through high temperature pyrolysis of citrus peels under anoxic conditions,and Cu2O/CuO/BC composite materials were formed by a two-step method.Firstly,Cu-included sediments were loaded on the surface of BC by precipitation method,and then calcination method under anoxic conditions was used to form Cu2O/CuO/BC composite materials.The prepared materials were characterized by X-ray powder diffraction (XRD) and scanning electron microscope (SEM).Cu2O/CuO/BC composite materials were employed to activate peroxymonosulfate (PMS) for degrading tetracycline hydrochloride (TC) in wastewater.Results show that the catalytic activity of Cu2O/CuO/BC composite materials was much better than that of BC or Cu2O/CuO,the TC degradation rate over Cu2O/CuO/BC (0.118 8 min-1) was greater than the sum of that over BC(0.016 4 min-1) and Cu2O/CuO (0.073 3 min-1),which proved the existence of the synergistic effects of BC and Cu2O/CuO on the PMS activation.Meanwhile,the effects of the composite ratio of Cu2O/CuO/BC,Cu2O/CuO/BC dosages,PMS concentration,pH value on the degradation of TC were investigated through static experiments.And the existence of inorganic anions (Cl-,CO32-,NO3-) and humic acid had a negative impact on the removal of TC.Among them,CO32-had the strongest inhibition,the TC degradation rate decreased to 0.036 min-1.In addition,Cu2O/CuO/BC composite materials were used to activate PMS for degrading other organic pollutants,such as methyl orange(MO),methylene blue (MB).And MO can be thoroughly degraded in 5 min,most all of MB (91.04%) can be degraded in40 min.Radical trapping tests suggested that hydroxyl radical (·OH) and singlet oxygen (~1O2) play the main role in the degradation of TC.
- Subjects
X-ray powder diffraction; SCANNING electron microscopes; COMPOSITE materials; CATALYTIC activity; PEROXYMONOSULFATE; METHYLENE blue
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 3, p188
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2580.21.338