研究报告
雷志斌,胡勇有,于琪.复合生物絮凝剂CBF-1的制备及其絮凝特性[J].环境科学学报,2012,32(12):2905-2911
复合生物絮凝剂CBF-1的制备及其絮凝特性
- Study on the preparation of the compound bioflocculant CBF-1 and its flocculation properties
- 基金项目：国家高技术研究发展计划资助项目(No.SQ2009AA06XK1482412)
- 作者
- 单位
- 雷志斌
- 华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,广州 510006
- 胡勇有
- 华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,广州 510006
- 于琪
- 华南理工大学环境科学与工程学院,工业聚集区污染控制与生态修复教育部重点实验室,广州 510006
- 摘要：采用机械混合的方法,将微生物絮凝剂MBF8与植物胶粉羧甲基改性絮凝剂CG-A复合制备了新型高效复合生物絮凝剂CBF-1.采用FT-IR、zeta(ξ)电位、透射电镜分析,确定了CBF-1的特征官能团、电荷性及分子胶束形态等物化性质;采用烧杯絮凝实验,探究了CBF-1的絮凝特性.结果表明,制备CBF-1的最佳CG-A∶MBF8质量复合比为4∶6;CBF-1为含少量沉淀物的淡黄色液体(不溶物0.013%),有效成分为0.5%,pH 6.1,相对粘度 1.72;有效成分0.1%时等电点约pH 1.5;主要特征官能团有羟基、羧基、氨基、酰胺基及磷酸基.采用PAC(3 mg·L-1)+CBF-1(1.0~8.0 mg·L-1)复配絮凝,适用的pH为6.0~10.0,离子强度为0.5~5.0 mmol·L-1;对浊度100 NTU的高岭土悬浊液,在最佳条件PAC(3.0 mg·L-1)+CBF-1(1.0~2.0 mg·L-1),pH 8.0,离子强度3.0 mmol·L-1下,浊度去除率>92%,残余铝<75 μg·L-1;对浊度6~300 NTU的水,浊度去除率为61%~98%.
- Abstract：Compound bioflocculant (CBF-1) was prepared by mechanical mixing of microbial flocculant (MBF8) and biopolymeric flocculant (CG-A). The functional group, electrical and the framework characteristics of CBF-1 were determined by Fourier transform infrared (FTIR), Zeta(ξ) electric potential method and transmission electron microscope (TEM), respectively. Moreover, the flocculating properties of CBF-1 on treating kaolin suspension were also examined. The results showed that the optimum weight ratio of CG-A∶MBF8 was 4∶6. CBF-1 was pale yellow solution with 0.013% of undissolved substance. The pH value, relative viscosity (effective constituent 0.5%, 30 ℃) and isoionic point (effective constituent 0.1%) of such solution were 6.1, 1.72 and pH=1.5, respectively. The main specific functional groups were hydroxyl group, carboxyl group, amino group, amide group and phosphate group. With the PAC dosage of 3 mg·L-1 and the CBF-1 dosage range from 1.0 to 8.0 mg·L-1, the optimum pH value was 6.0~10.0 and the optimum ionic strength was 0.5~5.0 mmol·L-1 for the Jar tests. For the kaolin suspension with turbidity of 100 NTU, the removal rate of turbidity could achieve 92% and the residual aluminum was less than 75 μg·L-1 under a reaction pH of 8.0 and ionic strength of 3.0 mmol·L-1. For the kaolin suspension with turbidity of 6 to 300 NTU, the removal efficiency of turbidity ranged from 61% to 98%.
- Key words：microbial flocculant biopolymeric flocculant compound bioflocculant flocculation properties
摘要点击次数： 2042 全文下载次数： 2793
