华东师范大学学报（自然科学版）Issue(4)：114-123,10.DOI:10.3969/j.issn.1000-5641.2025.04.012
页岩气田钻井污水钙离子处理剂的制备及性能评价
Preparation and performance evaluation of Ca2+ion treatment agent for oilfield drilling wastewater
摘要
Abstract
In order to improve the water solubility of chitosan and its chelating ability to metal ions,a Ca2+ion treatment agent for drilling wastewater of shale gas field was successfully prepared by grafting acrylic acid(AA)onto water soluble chitosan(KJT-1)with high deacetylation degree(98%)using the potassium persulfate(KPS)as initiator.The synthesis reaction conditions(temperature,reaction time,initiator and acrylic acid dosage)were optimized using single factor experimental method with Ca2+removal rate in wastewater as the optimization target,the synthesized product of the optimal synthesis reaction conditions was structurally characterized using Fourier transform infrared spectroscopy(FTIR)and nuclear magnetic resonance spectroscopy(NMR)and evaluated for the effect on the removal of multivalent ions from simulated drilling wastewater.The results showed that the optimal synthetic reaction conditions for acrylic acid graft-modified water-soluble chitosan were chitosan∶potassium persulfate=1∶1.2(mass ratio),chitosan∶acrylic acid=1∶25(mass ratio),reaction time of 2 h,and reaction temperature of 70℃,the synthetic product(HCCLJ)under these conditions was consistent with the design of the molecular structure of the target product.When the amount of HCCLJ was added at 600 mg/L,the Ca2+ion content in simulated water can be reduced from 1 101 mg/L to 194 mg/L,and the calcium ion removal rate was 82.4%.The removal effect of different HCCLJ dosages on other multivalent ions was in the following order:total iron(Fe2+/Fe3+)>Ba2+>Mg2+>Al3+.HCCLJ can not only remove Ca2+ion,but also have a certain removal effect on other multivalent ions,which has a multi-effect function,and lays a foundation for the research and development of multivalent ions removal agent for oilfield drilling wastewater with a broad application prospect.关键词
壳聚糖/接枝改性/钙离子处理剂/多价离子Key words
chitosan/graft modification/Ca2+ion treatment agent/multivalent ions分类
能源科技引用本文复制引用
谭文峰,贾潇,杨迅,李鑫,郭一樊,程远鹏,唐善法..页岩气田钻井污水钙离子处理剂的制备及性能评价[J].华东师范大学学报（自然科学版）,2025,(4):114-123,10.基金项目
国家自然科学基金(51774049) （51774049）
中国石油天然气集团有限公司科学研究与技术开发项目(2021DJ6606) （2021DJ6606）
