Novel Magnetic Pomelo Peel Biochar for Enhancing Pb(II) And Cu(II) Adsorption: Performance and Mechanism
- PDF / 2,531,904 Bytes
- 15 Pages / 547.087 x 737.008 pts Page_size
- 36 Downloads / 182 Views
Novel Magnetic Pomelo Peel Biochar for Enhancing Pb(II) And Cu(II) Adsorption: Performance and Mechanism Yaoning Chen & Yihuan Liu & Yuanping Li & Yanrong Chen & Yanxin Wu & Hui Li & Sha Wang & Zhen Peng & Ran Xu & Ziping Zeng
Received: 20 May 2020 / Accepted: 15 July 2020 # Springer Nature Switzerland AG 2020
Abstract A novel magnetic pomelo peel biochar (MPPB) was prepared by hydrothermal pretreatment coupled with pyrolysis at 550 °C. Batch experiments were employed to investigate adsorption properties on biochar for Pb(II) and Cu(II). FTIR, SEM, XRD, XPS, and zeta potential were applied to characterize the biochar. The surface morphology of MPPB was rough, loose, and negatively charged and contained carboxyl and hydroxyl functional groups, which were favorable for adsorption. The MPPB showed excellent adsorption performances for Pb(II) with maximum capacity (205.391 mg/g), and the maximum amount on MPPB
for Cu(II) was 81.909 mg/g. Pseudo-second-order kinetic and Langmuir isotherm depicted well with adsorption behavior on biochar. It could be concluded that chemical complexation occurs during metal adsorption from change of the spectra of XPS and XRD. The competitive relation of coexisting cations with target metal inferred that ion exchange is not a key mechanism. Chemical complexation with functional groups and electrostatic attraction between MPPB and metals are the main adsorption mechanisms. The MPPB developed from pomelo peel was testified to be a potential adsorbent for water purification.
Yaoning Chen, Yihuan Liu and Yuanping Li contributed equally to this work.
Keywords Magnetic biochar . Pomelo peel . Adsorption . Heavy metal . Adsorption mechanism
Y. Chen (*) : Y. Liu : Y. Chen : Y. Wu : S. Wang : Z. Peng : R. Xu : Z. Zeng College of Environmental Science and Engineering, Hunan University, Changsha 410082, China e-mail: [email protected] Y. Chen : Y. Liu : Y. Chen : Y. Wu : S. Wang : Z. Peng : R. Xu : Z. Zeng Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China Y. Li (*) College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000 Hunan, China e-mail: [email protected] H. Li Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, China
1 Introduction The discharged water pollutant has turned into a growing widespread concern due to the rapid development of industrialization (Chen et al. 2019b, Chen et al.2020a). The unfavorable environmental effects of heavy metal pollution cannot be ignored on account their extreme toxicity, extensive sources, and non-biodegradability (Chen et al. 2020b). Industries’ effluents, streaming from electroplating, batteries, jewelry, chemical, metallurgical, and tanning, are the main source of heavy metals (Ho et al. 2017). In particular, Pb(II) and Cu(II) are generally consequently on extensive exploitation in industries (Lee et al. 2019; Sudha et al. 2015). The accumulation and concentration of heavy metal in living
404
Page 2
Data Loading...
