Adsorption of dyestuff from aqueous solutions through oxalic acid-modified swede rape straw: Adsorption process and disposal methodology of depleted bioadsorbents
文献类型： 外文期刊
作者： Feng, Yanfang 1 ; Dionysiou, Dionysios D. 4 ; Wu, Yonghong 2 ; Zhou, Hui 3 ; Xue, Lihong 1 ; He, Shiying 1 ; Yang, Lin 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China
2.State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China
4.Univ Cincinnati, Environm Engn & Sci Program, Cincinnati, OH 45221 USA
关键词： Bioadsorbent;Depleted bioadsorbents;Disposal;Oxalic acid;Swede rape straw (Brassica napus L.)
期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Swede rape straw (Brassica napus L.) was modified by oxalic acid under mild conditions producing an efficient dye adsorbent (SRSOA). This low-cost and environmental friendly bioadsorbent was characterized by various techniques and then applied to purify dye-contaminated aqueous solutions. Equilibrium study showed that the Langmuir model demonstrated the best fit to the equilibrium data and the methylene blue (MB) adsorption capacity calculated by this model was 432mgg~(-1). The adsorption process and mechanism is also discussed. To properly deal with the dye-loaded bioadsorbents, the disposal methodology is discussed and a biochar based on depleted bioadsorbents was for the first time produced and examined. This method both solved the disposal problem of contaminant-loaded bioadsorbents and produced an useful adsorbent thereafter. The study indicates that SRSOA is a promising substitute for ACs in purifying dye-contaminated wastewater and that producing biochars from contaminant-loaded bioadsorbents maybe a feasible disposal method.
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