Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH

Yang, Hefeng1,2; Li, Xiangming1; Wang, Yuting1; Wang, Junxia1; Yang, Lihong2,3; Ma, Zhiqiang2; Luo, Jipeng4; Cui, Xiaoqiang1; Yan, Beibei1; Chen, Guanyi1,5

2023-06-01

10.3390/pr11061671

PROCESSES   影响因子和分区

2227-9717

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 & DEG;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 m(2)/g) increased to 51.4 m(2)/g and 145.6 m(2)/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.

ammonium biochar sorption modification ball milling

SCI

英语

其他

Ministry of Science and Technology of the People's Republic of China[2021YFE0102500] ; CECEP DADI Environmental Remediation Co., Ltd.[2021GKF-0474]

Engineering

Engineering, Chemical

WOS:001017965900001

MDPI

Web of Science

1.Tianjin Univ, Sch Environm Sci & Engn, Tianjin Key Lab Biomass Waste Utilizat, Tianjin 300072, Peoples R China
2.CECEP DADI Environm Remediat Co Ltd, Beijing 100082, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
4.Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecol Hlth, Minist Educ, Hangzhou 310058, Peoples R China
5.Tianjin Univ Commerce, Sch Mech Engn, Tianjin 300134, Peoples R China

Yang, Hefeng,Li, Xiangming,Wang, Yuting,et al. Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH[J]. PROCESSES,2023,11(6).

Yang, Hefeng.,Li, Xiangming.,Wang, Yuting.,Wang, Junxia.,Yang, Lihong.,...&Chen, Guanyi.(2023).Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH.PROCESSES,11(6).

Yang, Hefeng,et al."Effective Removal of Ammonium from Aqueous Solution by Ball-Milled Biochar Modified with NaOH".PROCESSES 11.6(2023).