Sorption of Cr(VI) from dilute solutions and wastewater by live and pretreated biomass of Aspergillus flavus

被引:93
作者
Deepa, KK
Sathishkumar, M
Binupriya, AR
Murugesan, GS
Swaminathan, K
Yun, SE
机构
[1] Regent Ecotech Private Ltd, R&D Div, Coimbatore 641018, Tamil Nadu, India
[2] Bharathiar Univ, Dept Biotechnol, Microbial Biotechnol Div, Coimbatore 641046, Tamil Nadu, India
[3] Chonbuk Natl Univ, Inst Agr Sci & Technol, Dept Food Sci & Technol, Chonju 561756, South Korea
关键词
Aspergillus flavus; chromium; biomass pretreatment; adsorption; phytotoxicity;
D O I
10.1016/j.chemosphere.2005.04.087
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Sorption of Cr(VI) was carried out from dilute solutions using live and pretreated biomass in a batch mode. Effects of agitation time, adsorbent dosage and pH were examined. The autoclaved biomass that showed maximum adsorption capacity (Q(0) = 0.335 mg g(-1)) was used as an adsorbent in column studies. The optimized flow rate of 2.5 ml min(-1) and bed height 10 cm were used to determine the effect of metal ion concentration on removal of Cr(VI). Applying the BDST model to calculate the adsorption capacity (NO) of column, which showed 4.56 x 10(-5), 7.28 x 10(-5), 6.89 x 10(-5), 3.07 x 10(-5), 2.80 x 10(-5) Mg g(-1) for 4, 8, 12, 16 and 20 mg dm(-3) of Cr(VI), respectively. Batch sorption proved to be more efficient than the column sorption and hence batch sorption was used to remove Cr(VI) from a textile dyeing industry wastewater. The phytotoxic effect of treated and untreated wastewater was studied against Zea mays. Toxicity was reduced by 50% in the treated effluent. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:833 / 840
页数:8
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