CAJ | 학술논문

采用沼泽红假单胞菌为生物吸附剂,研究了锌离子初始浓度、pH值、吸附剂用量、菌龄、吸附时间等因素对沼泽红假单胞菌生物吸附模拟废水中锌的影响,探讨了吸附动力学特征。结果表明,沼泽红假单胞菌在Zn2＋初始质量浓度为200 mg/L、吸附剂用量0.5 g/L、菌龄32 h、pH=7、吸附时间80 min的条件下,对Zn2＋的吸附量为88.23 mg/g;其吸附行为可以用Langmuir和Freundlich吸附等温方程描述,但更符合Freundlich吸附等温方程。对Zn2＋的吸附过程符合二级动力学特征。
채용소택홍가단포균위생물흡부제,연구료자리자초시농도、pH치、흡부제용량、균령、흡부시간등인소대소택홍가단포균생물흡부모의폐수중자적영향,탐토료흡부동역학특정。결과표명,소택홍가단포균재Zn2＋초시질량농도위200 mg/L、흡부제용량0.5 g/L、균령32 h、pH=7、흡부시간80 min적조건하,대Zn2＋적흡부량위88.23 mg/g;기흡부행위가이용Langmuir화Freundlich흡부등온방정묘술,단경부합Freundlich흡부등온방정。대Zn2＋적흡부과정부합이급동역학특정。
This paper concerned about a renovated method of rhodopseudomonas palustrls cells as a biologic adsorbent used in an absorption test of Zn^2＋ in aqueous solution simulated wastewater. For the research purpose,we have done a series of experiments to deter- mine and define the influencing factors on the biosorption process, such as the initial concentration of Zn2＋ , pH value, the biomass concentration,the bacteria culturing time and the adsorbing time to Zn^2＋ along with our definition of their dynamic feature. The results showed that the maximum adsoption capacity for Zn^2＋ of R. palustris was 88.23 mg/g dry biomass under the following optimal conditions ： Zn^2＋ concentration 200 mg/L, the bacteria cultured 32 h later with the biomass of 0.5 g/L, as well as the pH = 7, absorption time 80 mins. Its adsorption behavior could be described by either the Langmuir adsorption isotherm equation or the Freundlich isotherm ad- sorption equation, the latter equation being the better. In addition, the adsorption of Zn^2＋ fit a pseudo-second order kinetics equation.