1. 毕业设计(论文)主要目标:
本论文拟通过对活性污泥吸附水体重金属的特征研究,明确不同条件下活性污泥对重金属的吸附性能。主要研究目标有:1.明确pH值对活性污泥吸附性能的影响,确定最佳pH值;
2.明确污泥生物量对吸附性能的影响,确定最佳活性污泥投加量;
2. 毕业设计(论文)主要内容:
本论文主要研究活性污泥对重金属(Cu、Cd、Ni、Zn和Pb)的吸附特征,主要研究内容包括:1、通过对照试验,保持污泥量和温度等条件不变,只改变pH值,研究吸附量的变化;
2、通过对照试验,保持pH和温度等条件不变,只改变污泥投加量,研究吸附量的变化;
3、通过以上结果建立吸附等温线,分别拟合Langmuir模型和Freundlinch模型,选取适合模型,观察各种金属的吸附特性;
3. 主要参考文献
[1] A.,Hammaini, F.,Gonzales. A.,Ballester., M.L.,Blazquez, J.a.,Munoz, 2007. Biosorption of heavy metal by activated sludge and their desorption characteristics. Journal of Environmental Management 84, 419-426.
[2] Ahuja, P., Gupta, R., Saxena, R.X., 1999. Sorption and desorption ofcobaltby O.scilatoriaanguistissima.CurrentMicrobiology39, 49-52.[3] Atdor, L, Fourest, E., Volesky, B., 1995. Desorption of cadmium from algalbiosorbent. CanadianJournalof ChemicalEngineering73,516-522.[4] Bux, F., Kasan, H.C., 1994. Comparison of selected methods for relative assessment of sulfate charge on waste sludge biomass. Water SA 20, 73-76.[5] Bux, F., Naidoo, P., Kasan, H.C., 1996. Laboratory-scale biosorption and desorption of metal ions using waste sludges and selected acids. South African Journal of Science 91, 527-529.[6] Fourest, E., Roux, J.C., 1992. Heavy metal bisorption by fungal mycelial by-products mechanisms and influence of pH. Applied microbiology and Biotechnology 67, 215-226.
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