生物技术通报2017，Vol.33Issue(10)：191-198,8.DOI:10.13560/j.cnki.biotech.bull.1985.2017-0196
黑曲霉发酵菌渣对臧红T的吸附研究
Adsorption of Safranine T by Aspergilus niger Biomass Waste
摘要
Abstract
The present work aims to investigate the adsorption of dye safranine T by Aspergillus niger biomass waste from amylase production as novel composite adsorbent. The biomass waste was first characterized concerning its physico-chemical properties and then evaluated for its potential of adsorbing safranine T under different conditions,namely contact time,temperature,sorbent dosage,initial dye concentration and metal ion. The isotherms,dynamics,and thermodynamics were fitted with the above data,which showed that pseudo second order dynamics equation better described the adsorption with equilibrium achieved within 2 h,suggesting it was chemosorption,and film diffusion model was more suitable to explain the adsorption than internal diffusion model. Higher temperatures significantly promoted dye removal,and adsorption was both spontaneous(ΔG ° < 0)and endothermic(ΔH ° > 0). The maximal monolayer adsorption capacity was calculated to be around 166.67 mg/g through Langmuir equation while Freundlich was more suitable to explain the adsorption,indicating that there were multiple absorptive sites on the surface of biomass waste. In addition,sorbent dosage and sodium ion concentration both impacted adsorption with the highest removal rate of 91%.关键词
黑曲霉菌渣/吸附/臧红T/动力学/等温吸附Key words
Aspergilus niger biomass waste/adsorption/safranine T/dynamic model/isotherm equation引用本文复制引用
魏姜勉,鲁雷震,焦国宝,刘家扬,陆隽鹤..黑曲霉发酵菌渣对臧红T的吸附研究[J].生物技术通报,2017,33(10):191-198,8.基金项目
国家自然科学基金项目(51503074) （51503074）
