Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars

Corn straw- and municipal sludge-derived biochars (CS-BC and MS-BC, respectively) were used to remove Pb(II) from aqueous solutions. Despite being pyrolysed at the same temperature (723 K), MS-BC showed higher porosity and hydrophobicity than CS-BC. The optimum biochar loading and pH values allowing...

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Main Authors: Shujuan Wang, Wei Guo, Fan Gao, Rui Yang
Format: Article
Language:English
Published: The Royal Society 2017-01-01
Series:Royal Society Open Science
Subjects:
Online Access:https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170402
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spelling doaj-17365776493f42da89ab8f029eb40a392020-11-25T03:59:24ZengThe Royal SocietyRoyal Society Open Science2054-57032017-01-014910.1098/rsos.170402170402Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biocharsShujuan WangWei GuoFan GaoRui YangCorn straw- and municipal sludge-derived biochars (CS-BC and MS-BC, respectively) were used to remove Pb(II) from aqueous solutions. Despite being pyrolysed at the same temperature (723 K), MS-BC showed higher porosity and hydrophobicity than CS-BC. The optimum biochar loading and pH values allowing efficient Pb(II) removal (greater than 80%) were 0.2 g l−1 and 7.0, respectively. The presence of PO43− (greater than 0.01 mol l−1) significantly affected the adsorptive performance of Pb(II) on the biochar samples. The adsorption data fitted well to a pseudo-second-order kinetic model and a Langmuir model, and the maximum Pb(II) adsorption capacities were 352 and 387 mg g−1 for CS-BC and MS-BC, respectively. The main mechanisms involved in the adsorption of Pb(II) on biochar were electrostatic attraction and surface complexation. When comparing both biochars, CS-BC showed better cost-effectiveness for the removal of Pb(II) from aqueous solutions.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170402adsorptionleadbiocharsewage sludgepyrolysis
collection DOAJ
language English
format Article
sources DOAJ
author Shujuan Wang
Wei Guo
Fan Gao
Rui Yang
spellingShingle Shujuan Wang
Wei Guo
Fan Gao
Rui Yang
Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
Royal Society Open Science
adsorption
lead
biochar
sewage sludge
pyrolysis
author_facet Shujuan Wang
Wei Guo
Fan Gao
Rui Yang
author_sort Shujuan Wang
title Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
title_short Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
title_full Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
title_fullStr Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
title_full_unstemmed Characterization and Pb(II) removal potential of corn straw- and municipal sludge-derived biochars
title_sort characterization and pb(ii) removal potential of corn straw- and municipal sludge-derived biochars
publisher The Royal Society
series Royal Society Open Science
issn 2054-5703
publishDate 2017-01-01
description Corn straw- and municipal sludge-derived biochars (CS-BC and MS-BC, respectively) were used to remove Pb(II) from aqueous solutions. Despite being pyrolysed at the same temperature (723 K), MS-BC showed higher porosity and hydrophobicity than CS-BC. The optimum biochar loading and pH values allowing efficient Pb(II) removal (greater than 80%) were 0.2 g l−1 and 7.0, respectively. The presence of PO43− (greater than 0.01 mol l−1) significantly affected the adsorptive performance of Pb(II) on the biochar samples. The adsorption data fitted well to a pseudo-second-order kinetic model and a Langmuir model, and the maximum Pb(II) adsorption capacities were 352 and 387 mg g−1 for CS-BC and MS-BC, respectively. The main mechanisms involved in the adsorption of Pb(II) on biochar were electrostatic attraction and surface complexation. When comparing both biochars, CS-BC showed better cost-effectiveness for the removal of Pb(II) from aqueous solutions.
topic adsorption
lead
biochar
sewage sludge
pyrolysis
url https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170402
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