期刊
BIORESOURCE TECHNOLOGY
卷 343, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.126046
关键词
Hydrochar; Adsorption; CaCO3; Pb(II); Tetracycline
资金
- National Natural Science Fund for Distinguished Young Scholars [41625002]
- National Natural Science Foundation of China [42007113]
- International Cooperation and Exchange Programme [41961144030]
- China Postdoctoral Science Foundation [2020 M670875]
- Heilongjiang Postdoctoral Science Foundation [LBH-Z19004]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2020114]
Ca-based magnetic bamboo-derived hydrochar, known as Ca-MBHC, synthesized by one-pot pyrolysis, exhibited magnetism and efficient adsorption of lead and tetracycline. Adsorption kinetic and isotherm experiments demonstrated the excellent adsorption capacity of Ca-MBHC for both pollutants.
Ca-based magnetic bamboo-derived hydrochar described as Ca-MBHC was synthesized by one-pot pyrolysis, and was applied to remediation of lead (Pb) and tetracycline (TC) polluted water. Characterizations not only attested the loading of CaCO3 and Fe-0 onto the hydrochar, but also demonstrated the magnetism of Ca-MBHC. Adsorption kinetic experiments showed that the Ca-MBHC could eliminate Pb(II) and TC during a wide range of pH, and appeared rapid uptake equilibrium within 240 and 60 min for Pb(II) and TC, severally. Adsorption isotherm experiments showed that the Ca-MBHC possessed highest adsorption of 475.58 mg/g concerning Pb(II), and heterogeneous uptake of 142.44 mg/g for TC. Furthermore, the Ca-MBHC could achieve Pb(II) binding owing to complexation, reduction, ion exchange and electrostatic attraction, whereas the TC uptake might be related to pi-pi stacking reciprocities, pore filling and hydrogen bonding. Overall, the Ca-MBHC could be viewed as an excellent adsorbent for scavenging Pb(II) and tetracycline from water.
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