期刊
JOURNAL OF WATER PROCESS ENGINEERING
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jwpe.2020.101908
关键词
Tetracycline; Alkaline modified-biochar; Spent coffee ground; Adsorption
资金
- Taiwan MOST [109-2222-E-992-002]
The study investigated the feasibility of using alkaline modified-biochar prepared from pyrolysis of spent coffee grounds to eliminate tetracycline from different aqueous solutions. The results showed that the modified-biochar had a higher adsorption capacity for tetracycline compared to the non-modified biochar, making it a promising environmentally effective adsorbent. The study also examined the environmental factors that affect the interaction between biochar and tetracycline, such as pH and ions.
The feasibility of applying alkaline modified-biochar prepared through pyrolysis of spent coffee ground (NaOHSCG) in the elimination of tetracycline (TC) from different aqueous solutions was investigated through this study. The physico-chemical characterization of NaOH-SCG was scrutinized by distinct techniques. The PAHs concentration of NaOH-SCG (500 degrees C) was 693 mu g kg(-1) , which do not exceed the international acceptable threshold of PAHs in biochar as reported by International Biochar Initiative (6-20 mg kg(-1)) and European Biochar Certificate (4 mg kg(-1) for premium class, 6 mg kg(-1) for basic class). From the experimental results, the adsorption capacity (q(max)) of NaOH-SCG biochar (113.64 mg g(-1)) exhibited 2.9 times higher than that of the non-modified SCG (39.22 mg g(-1)). Furthermore, environmental factors, namely, pH and ions, affecting the interaction between biochar and TC was investigated. Alkaline modified-biochar exhibited high tetracycline adsorption capacity and therefore has a great prospect as an environmentally effective adsorbent in separation of hazardous chemicals from different aqueous solutions.
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