LAPSE:2023.36212
Published Article
LAPSE:2023.36212
Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH
July 4, 2023
The objective of this study was to investigate the feasibility of using modified biochars to enhance removal of ammonium from aqueous solution. The pristine, NaOH-modified, ball-milled, and NaOH-modified ball-milled biochars were prepared from wheat straw at 500 °C. The surface morphology and characteristics of biochar were obviously changed after modification. The NaOH-modification elevated the pH value and ash content of biochar, and the ball-milling treatment promoted the formation of oxygen-containing functional groups. The specific surface area of biochar (20.9 m2/g) increased to 51.4 m2/g and 145.6 m2/g after NaOH-modification and ball-milling treatment, respectively. The modified biochars showed considerable ammonium sorption capacity in a wide pH range (3−7), and the optimal pH of ammonium sorption was around 6. Both NaOH-modification and ball-milling treatment improved ammonium sorption on the biochars. Ammonium sorption of the biochars could be well fitted by the Langmuir and pseudo-second-order model, and the NaOH-modified ball-milled biochar showed the highest ammonium sorption capacity of 8.93 mg g−1. The surface complexation with oxygen-containing functional groups and cation exchange were the dominant mechanisms of ammonium sorption on the biochars. These results indicate that NaOH-modified/ball-milled biochar has a good potential to be used for the ammonium removal from polluted water.
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Keywords
ammonium, ball milling, biochar, modification, sorption
Subject
Suggested Citation
Yang H, Li X, Wang Y, Wang J, Yang L, Ma Z, Luo J, Cui X, Yan B, Chen G. Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH. (2023). LAPSE:2023.36212
Author Affiliations
Yang H: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; CECEP DADI Environmental Remediation Co., Ltd., Beijing 100082, China
Li X: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Wang Y: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Wang J: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Yang L: CECEP DADI Environmental Remediation Co., Ltd., Beijing 100082, China; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Ma Z: CECEP DADI Environmental Remediation Co., Ltd., Beijing 100082, China
Luo J: Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Cui X: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Yan B: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Chen G: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Li X: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Wang Y: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Wang J: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Yang L: CECEP DADI Environmental Remediation Co., Ltd., Beijing 100082, China; School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Ma Z: CECEP DADI Environmental Remediation Co., Ltd., Beijing 100082, China
Luo J: Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
Cui X: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Yan B: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
Chen G: Tianjin Key Lab of Biomass Waste Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Journal Name
Processes
Volume
11
Issue
6
First Page
1671
Year
2023
Publication Date
2023-05-31
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr11061671, Publication Type: Journal Article
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LAPSE:2023.36212
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doi:10.3390/pr11061671
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[v1] (Original Submission)
Jul 4, 2023
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Jul 4, 2023
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https://psecommunity.org/LAPSE:2023.36212
Original Submitter
Calvin Tsay
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