黄孢原毛平革菌吸附Cd^(2+)和Zn^(2+)的研究

Study of Biosorption of Cd^(2+) and Zn^(2+) with Phanerochaete chrysosporium in Wastewater

利用黑曲霉常用液体培养基对黄孢原毛平革菌进行扩大培养,得到的菌丝球用于吸附废水中的Cd2+和Zn2+。本研究考察了初始pH、吸附时间以及共存离子对P.chrysosporium菌丝球吸附Cd2+和Zn2+的影响。在相同的实验条件下,研究重金属溶液初始浓度对吸附的影响发现其吸附曲线呈L2型,对重金属终浓度以及吸附量进行线性转换,发现Langmuir和Freundlich吸附模型能较好的描述P.chrysosporium菌丝球对Cd2+和Zn2+的吸附。将P.chrysosporium吸附Zn2+和Cd2+前后的红外光谱图作比较,发现P.chrysosporium吸附Zn2+和Cd2+后的主要成分和结构保持完整,3302 cm-1峰位分别移动61 cm-1和94 cm-1。

Phanerochaete chrysosporium mycelial peUet, which was cultured with the usual liquid culture medium of Aspergillus niger, was used to adsorb Cd^2＋ and Zn^2＋ in wastewater. The study reviewed the effects of the initial pH values, biosorption time and co-existing ions to the biosorption of Cd^2＋ and Zn^2＋ with Phanerochaete chrysosporium in wastewater. Under the same conditions, the effects of the initial concentration of heavy metals to biosorption were studied, and according to the linear conversion between final concentration of heavy metals and biosorption capacity, Langmuir and Freundlich isotherm models can perfectly describe the biosorption of Cd^2＋ and Zn^2＋ with Phanerochaete chrysosporium.Compared with Phanerochaete chrysosporium adsorbed by Cd^2＋ and Zn^2＋ by infrared spectroscopy, the major components and the structure of Phanerochaete chrysosporium remained intact. The peak at 3302 cm^-1 shifted to 3363 and 3396 cm^-1 respectively.