摘要：

120℃下将废弃酵母与尿素混合，半干法制备了氨化酵母吸附剂，SEM分析表明氨化酵母产品呈椭球状，分散性好，粒径约为3 μm。FT-IR表明在3 300 cm^-1左右出现氨基峰。以盐酸四环素模拟废水为处理对象，考察了各因素对吸附过程的影响，研究了吸附动力学和吸附等温模型。实验表明最佳吸附pH为7；3.0 h后吸附量达到平衡；吸附过程遵循准二级动力学方程，受颗粒内扩散控制。饱和吸附后的氨化酵母吸附剂在强酸条件下可实现再生。

关键词: 尿素, 酵母, 盐酸四环素, 吸附, 再生

Abstract:

Ammoniated yeast adsorbent has been prepared by semi-dry process,mixing waste yeast with urea at 120℃. SEM analysis show that ammoniated yeast is distributed uniformly,and they are in ellipsoidal shape with particle size of about 3 μm,and FT-IR shows that the amino peak appears at around 3 300 cm^-1. Taking simulated tetracycline hydrochloride as research target,the influences of the factors on adsorption process are investigated,and adsorption kinetics and adsorption isothermal model are studied. The experiments show that the optimal pH of adsorption is about 7. The adsorption capacity reaches equilibrium after 3.0 h. The adsorption process follows the pseudo-second-order kinetics equation,being controlled by intraparticle distribution. The ammoniated yeast adsorbent after saturated adsorption,can be regenerated under strong acidic condition.

Key words: urea, yeast, tetracycline hydrochloride, adsorption, regeneration

中图分类号: 

• X703.3