摘要
采用反滴加-化学共沉淀法,以Fe Cl3·6H2O和Fe SO4·7H2O为原料、H2O为基液、Na OH为沉淀剂、聚乙二醇(PEG)为表面活性剂合成Fe3O4水基磁流体,通过正交实验优化,得到最适宜的反应条件。通过XRD、AGM、TEM、TGDSC等对磁性纳米粒子进行表征。结果表明:当Fe3+和Fe2+的浓度为0.3 mol·L-1、n(Fe3+)/n(Fe2+)为1.5、体系p H值为12、反应温度为50℃、反应时间为60 min、PEG质量浓度为60 g·L-1时,产品的粒度平均为31.98 nm,饱和磁强度平均为55.82 emu/g;水基磁流体与聚铝、聚丙烯酰胺复配使用,结合磁分离装置,净水效果和处理效率明显提高,处理后的污水油含量小于1 mg·L-1,除油率可达99%,悬浮物含量降至3 mg·L-1以下,水质达到回注A级标准。
The water-based Fe3 04 magnetic fluid was prepared by reverse titration co-precipitation method, in which the FeC13 · 6H2O and FeSO4 · 7H2O were raw materials, the water was the carrier liquid, the NaOH was used as the precipitation agent and the PEG was the surfactant. The optimum synthesis conditions of water-based magnetic fluid were determined by orthogonal test. The structure was characterized by XRD, AGM, TEM and TG-DSC, etc. The results show that the average size of Fe3 04 particles is 31.98 nm and the saturation magnetization of Fe304 particles is 55.82 emu. g-1 under the following reaction condi- tions; the Fe3＋ and Fe2＋ concentration 0. 3 mol · L-l , n（Fe3＋）/n（Fe2＋） 1.5, system pH value of 12, reaction temperature 50 ℃, reaction time 60 min, PEG concentration 60 g · L-1. The product compounded with Polyaluminum Chloride ＆ PAM using a magnetic separation device are applied to treat oilfield produced water. And the effect and efficiency of oil removal is improved significantly. The oil content of treated sewage is less than 1 mg· L-1 , the effect of oil removal is up to 99%, and the suspen- ded solids content of treated sewage is reduced less than 3 mg · L-1 , which can meet the injection standard A.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第4期171-177,共7页
Journal of China University of Petroleum(Edition of Natural Science)
关键词
水基磁流体
油田污水处理
絮凝
除油
磁分离
胜利油田
water-based magnetic fluid
oilfield oily sewage treatment
flocculation
deoiling
magnetic separation
Shengli Oilfield
