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Calcium-rich biochar from the pyrolysis of crab shell for phosphorus removal
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 [less than or equal to]600 [degrees]C, while lime-based CRB was prepared at temperature [greater than or equal to]700 [degrees]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 CaCO.sub.3 and Ca(OH).sub.2, P removal potential of calcite-based CRB was much higher than that of CaCO.sub.3; while that of lime-based CRB was close to that of Ca(OH).sub.2. These results suggested that CRB was competent for P removal/recovery from wastewater.
Calcium-rich biochar from the pyrolysis of crab shell for phosphorus removal
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 [less than or equal to]600 [degrees]C, while lime-based CRB was prepared at temperature [greater than or equal to]700 [degrees]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 CaCO.sub.3 and Ca(OH).sub.2, P removal potential of calcite-based CRB was much higher than that of CaCO.sub.3; while that of lime-based CRB was close to that of Ca(OH).sub.2. These results suggested that CRB was competent for P removal/recovery from wastewater.
Calcium-rich biochar from the pyrolysis of crab shell for phosphorus removal
Dai, Lichun (Autor:in) / Tan, Furong / Li, Hong / Zhu, Nengmin / He, Mingxiong / Zhu, Qili / Hu, Guoquan / Wang, Li / Zhao, Jie
2017
Aufsatz (Zeitschrift)
Englisch
BKL:
43.00
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