Macro- and micro-algae-based carbon composite for pharmaceutical wastewater treatment: Batch adsorption and mechanism study
文献类型： 外文期刊
作者： Xu, Shannan 1 ; Yang, Jingwen 4 ; Marrakchi, Fatma 5 ; Wei, Manman 4 ; Liu, Yong 1 ; Xiao, Yayuan 1 ; Li, Chunhou 1 ; Wang, Shuang 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst,Key Lab Marine, Minist Agr & Rural Affairs, Guangdong Prov Key Lab Fishery Ecol & Environm, Guangzhou 510300, Peoples R China
2.Sci Observat & Res Stn Pearl River Estuary Ecosys, Guangzhou 510300, PR, Peoples R China
3.Sanya Trop Fisheries Res Inst, Key Lab Efficient Utilizat & Proc Marine Fishery, Sanya 572018, Hainan, Peoples R China
4.Sch Energy & Power Engn, Jiangsu 212013, Peoples R China
5.Aalborg Univ, AAU Energy, Pontoppidanstraede 111, DK-9220 Aalborg, Denmark
关键词： Tetracycline; Biochar; Algal biomass; Adsorption capacity; Surface area; Composite activated carbon
期刊名称：PROCESS SAFETY AND ENVIRONMENTAL PROTECTION （ 影响因子：7.8； 五年影响因子：7.5 ）
ISSN： 0957-5820
年卷期： 2023 年 176 卷
页码：
收录情况： SCI
摘要： Biochar synthesized from algal biomasses acts as an efficient adsorbent to remove tetracycline (TC) from aqueous solutions. In this study, a mixture of Enteromorpha (EN) and Chlorella vulgaris (CV) was pyrolyzed at 500 degrees C, then activated with NaOH at 800 degrees C to prepare composite biochar (ECA-B). The effects of TC concentration (50-500 mg.L-1), pH (3-11), temperature (30 degrees C-50 degrees C), and contact time (0-960 min) on TC absorption were investigated. Results revealed that in aqueous solutions, the biochar (EC4:1-0.5)prepared with CV and EN at the mass ratio of 4:1 and the impregnation ratio of 0.5 had the optimal TC adsorption capacity (Q(m) = 376.878 mg.g(-1)). The removal rate of EC4:1-0.5 remained above 80 % after five cycles. The surface area of EC4:1-0.5 (583.329 m(2).g(-1)) increased by three and four times that of EN and CV, respectively. Intraparticle diffusion was considered as the major limitation for the adsorption of TC onto EC4:1-0.5. This investigation provides a method for the synthesis and optimization of algal biomass-based activated carbon for the absorption of organic pollutants in wastewater.
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