摘要
为了开发新型生物吸附剂,研究了啤酒废酵母对Pb2+的生物吸附能力。初步确定了啤酒废酵母对Pb2+的最佳吸附条件,起始pH为5,Pb2+的起始质量浓度为50 mg/L,酵母的质量浓度为1 g/L,吸附温度为30℃,吸附时间为60 min,在此条件下啤酒废酵母对Pb2+的吸附率可达93.50%。对吸附了Pb2+的啤酒废酵母进行解吸实验,表明浓度为1 mol/L的HCl为较好的解吸剂,其解吸率可达54.59%。通过计算分析表明,啤酒废酵母对Pb2+的吸附符合Langmuir吸附模型和Freundlich吸附模型,且符合Langmuir吸附模型的程度更优。最后对未吸附Pb2+的空白酵母和吸附Pb2+的酵母进行了红外光谱分析,比较了啤酒废酵母吸附Pb2+前后的变化。
The biosorption action of lead（Ⅱ ） by beer discarded brewer＇s yeast was studied for exploiting new types of biosorbent. The optimal adsorption conditions of lead（ Ⅱ ） by discarded brewer＇s yeast were determined at first. Initial pH value is 5, initial mars concentration of lead（ Ⅱ） is 50 mg/L, the mass concentration of yeast is 1 g/L, adsorption temperature is 30 ℃ , and adsorption time is 60 minutes. Under the above conditions, the adsorption rate of lead（ Ⅱ ） by discarded brewer＇s yeast can reach to 93, 50%. The desorptive experiment of discarded brewer＇s yeast adsorbed lead（Ⅱ） was performed. It shows that the preferable desorbent is HCI （concentration is 1 mol/L）, the, desorption rate of which reaches to 54, 59%. According to calculation, it is demonstrated the adsorption lead（ Ⅱ ） process of discarded brewer＇ s yeast is in accordance with both Langmuir and Freundlich adsorption model, and better complied with Langmuir adsorption model. The blank and lead （Ⅱ） - biosorption yeast were studied by infrared spectra analysis, and the difference of which was compared.
出处
《辽宁石油化工大学学报》
CAS
2006年第1期26-29,共4页
Journal of Liaoning Petrochemical University
关键词
啤酒废酵母
生物吸附
PB^2+
红外光谱
Discarded brewer＇s yeast
Biosorption
Lead （ Ⅱ ）
Infrared spectra
