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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Evaluation of Biochar for Pollutant
Adsorption by Analytical M
1
School of Chemical and Materials Engineering, Hainan Vocational University of Science and Technology,
No. 18 Qiongshan Road, Meilan District, Haikou 571126, China
2
College of Resources and Environment, Northeast Agricultural University, No. 600 Changjiang Road,
Xiangfang District, Harbin 150030, China
Submission date: 2025-07-02
Final revision date: 2025-09-30
Acceptance date: 2025-11-24
Online publication date: 2026-06-30
Corresponding author
Yingjie Dai
College of Resources and Environment, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin 150030, China
College of Resources and Environment, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin 150030, China
KEYWORDS
TOPICS
ABSTRACT
The aim of this study is to objectively evaluate the adsorption performance of biochar.
The performances of various biochars in adsorbing pollutants were thoroughly evaluated and compared
using a combination of Analytical Hierarchy Process (AHP) and Grey Relational Analysis (GRA).
The importance rankings of adsorption amount, adsorption time, and specific surface area in adsorption
performance were determined through AHP, and the weights of each index were calculated to ensure
consistency. Utilizing GRA, the degree of correlation between specific surface area, adsorption time,
and adsorption performance was assessed, with adsorption amount as the reference value, which further
validated the AHP results. The results show that adsorption capacity holds the highest weight at 64.83%,
followed by adsorption time at 22.97%, and specific surface area at 12.20%, based on the AHP analysis.
The GRA further confirms a stronger correlation between adsorption time and adsorption capacity,
highlighting the greater influence of adsorption time on adsorption performance compared to specific
surface area. These findings offer crucial guidance for applying biochar in environmental management,
enhancing pollutant removal processes, optimizing material choices, and supporting environmental
protection and sustainable development initiatives.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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