文献类型： 外文期刊
作者： Lonappan, Linson 1 ; Rouissi, Tarek 1 ; Liu, Yuxue 1 ; Brar, Satinder Kaur 1 ; Surampalli, R. Y. 4 ;
作者机构： 1.Univ Quebec, INRS ETE, 490 Rue Couronne, Quebec City, PQ G1K 9A9, Canada
2.York Univ, Lassonde Sch Engn, Dept Civil Engn, Toronto, ON M3J 1P3, Canada
3.Zhejiang Acad Agr Sci, Inst Environm Resources Soil & Fertilizer, 198 Shiqiao Rd, Hangzhou 310021, Zhejiang, Peoples R China
4.Global Inst Energy Environm & Sustainabil, POB 14354, Lenexa, KS 66285 USA
关键词： Biochar; Diclofenac; Adsorption; Fixed-bed column; Biodegradation; Laccase
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：5.909； 五年影响因子：5.649 ）
ISSN： 2213-2929
年卷期： 2019 年 7 卷 1 期
页码：
收录情况： SCI
摘要： Laccase bound biochar as a fixed-bed column for the removal of emerging contaminant, diclofenac (DCF) provides novel insights into valorization of waste materials, application of environmentally benign sorbents and removal of DCF with possibilities of scaling up for larger applications. Micro-biochar prepared from pine wood (BC-PW) and pig manure (BC-PM) were evaluated for the removal of DCF at environmentally relevant concentrations under continuous fixed-fed column operating conditions. Biochars were characterized for particle size, total metals, elemental composition, surface area, porosity, surface texture, and functional groups. The ligninolytic enzyme laccase was immobilized on micro-biochars and tested for removal/biodegradation of DCF under optimized conditions obtained from adsorption column experiments At an environmentally relevant concentration (500 mu g L-1), BC-PM exhibited an adsorption capacity of 4.10 mg g(-1) with bed mass: 2 g, flow rate: 2 mL min(-1) and at pH: 6.5. For all biochars, uptake of DCF through a fixed-bed column was dependent on the mass of adsorbent (bed height) and DCF concentration. Adsorption capacity decreased with increasing bed height whereas increased with increasing DCF concentration. The Thomas and Yoon-Nelson models were successfully applied to predict the breakthrough curves, indicating that these models were used for designing and scaling-up fixed-bed biochar columns.
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