Experimental investigation on adsorption properties of biochar derived from algae biomass residue of biodiesel production

被引：26

作者：

Nautiyal P. ^{[1
]}

Subramanian K.A. ^{[1
]}

Dastidar M.G. ^{[1
]}

机构：

[1] Centre for Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, Delhi

来源：

Environmental Processes | 2017年 / 4卷 / Suppl 1期

关键词：

Adsorption; Algae; Biochar; Biodiesel; Dye;

D O I：

10.1007/s40710-017-0230-2

中图分类号：

学科分类号：

摘要：

The adsorption of methylene blue (MB) dye was investigated by utilizing biochar (BC) generated from residue (DB) of Spirulina platensis algae biomass (AB) left after simultaneous oil extraction and transesterification for biodiesel production. The motivation of the study was to reduce the overall downstream processing costs of biodiesel which could help in strengthening its sustainability economically. The experiments for batch adsorption studies were performed to examine the adsorption rate of MB dye from aqueous solution using adsorbents such as BC, AC (commer-cially available activated carbon), DB and AB as a function of initial dye concentra-tion, adsorbent dosage and pH of the solution. The better adsorption was observed in the case of AC and BC, i.e., 95.6% and 92.6% of dye removal, respectively, compared to other two absorbents, AB (85.2%) and DB (86.4%). The maximum removal of dye (92.6%) was obtained by BC at alkaline pH with adsorbent dosage of 0.2 g/100 mL and initial concentration of dye of 90 mg/L. The adsorption capacity, qo, of biochar was found out to be 57.80 mg/g. Comparing the results of all three isotherms, namely Langmuir, Freundlich and Temkin, the coefficient of determination for Freundlich model was found to be the highest, and thus, it was selected as the most suitable isotherm to describe the equilibrium mechanics of dye adsorption. The production of BC from DB highlights that the waste residue of biodiesel industry can be alternatively used as adsorbent, enhancing the sustainability of algae biodiesel in an environmentally friendly manner. © Springer International Publishing Switzerland 2017.

引用

页码：S179 / S193

页数：14

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