| Literature DB >> 28453987 |
Lichun Dai1, Furong Tan2, Hong Li3, Nengmin Zhu4, Mingxiong He2, Qili Zhu2, Guoquan Hu2, Li Wang5, Jie Zhao5.
Abstract
Calcium-rich biochars (CRB) prepared through pyrolysis of crab shell at various temperatures were characterized for physicochemical properties and P removal potential. Elemental analysis showed that CRB was rich in calcium (22.91%-36.14%), while poor in carbon (25.21%-9.08%). FTIR, XRD and TG analyses showed that calcite-based CRB was prepared at temperature ≤600 °C, while lime-based CRB was prepared at temperature ≥700 °C. Phosphorus removal experiment showed that P removal efficiencies in 80 mg P/L phosphate solution and biogas effluent ranged from 26% to 11%, respectively, to about 100% and 63%, respectively, depending on the pyrolysis temperature of the resulting biochar. Specifically, compared to common used CaCO3 and Ca(OH)2, P removal potential of calcite-based CRB was much higher than that of CaCO3; while that of lime-based CRB was close to that of Ca(OH)2. These results suggested that CRB was competent for P removal/recovery from wastewater.Entities:
Keywords: Calcite; Calcium-rich biochar; Crab shell; Lime; Phosphorus removal; Pyrolysis
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Year: 2017 PMID： 28453987 DOI： 10.1016/j.jenvman.2017.04.057
Source DB: PubMed Journal: J Environ Manage ISSN： 0301-4797 Impact factor: 6.789