摘要
该文研究了以硅藻土及颗粒硅藻土作为吸附剂处理油田采出水生化废水的可行性。结果表明：一级硅藻土及硅藻精土对COD的最佳吸附时间均为60min；一级硅藻土对COD的去除率约为29．3％，最佳投加量为300mg／L；硅藻精土对COD的去除率为40．6％，最佳投加量为200mg／L。经1000～1200℃灼烧所得颗粒硅藻土对COD有较强的吸附效果，经处理后的油田采出水可达到一级A标准。颗粒硅藻土饱和后经500～600℃灼烧2h可实现有效再生，在同样进水条件下出水可达一级B标准。颗粒硅藻土对难降解有机物质吸附性能良好，装置出水中丙酮、二氯甲烷、甲苯、正十一烷、四氯化碳、苯等含量均小于1μg/L。
Diatomite and granular diatomite were used as adsorbent in oilfield produced water treatment. Results showed that the best COD adsorption of the frst class diatomite and essence diatomite were both 60 min. COD removal rate of the first class diatomite was approximately 29.3%, the optimum dosage was 300 mg/L while COD removal rate of essence diatomite was approximately 40.6%, and the optimum dosage was 200 mg/L. The granular diatomite, which was obtained from 1 000～1 200 ℃ burning diatomite, has strong COD adsorption effect, with treated oilfield produced water satisfactory to Grade A standard. Saturated granular diatomite can achieve effective regeneration after burning 2 h under 500～600℃, under the same experimental conditions, the effluent water can reach Grade B standard. The granular diatomite adsorption effect on refractory organic matter was good, the content of acetone, methylene chloride, toluene, n-undecane, carbon tetrachloride, benzene in the effluent water were less than 1 μg/L.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第10期86-89,共4页
Environmental Science & Technology
关键词
硅藻土
颗粒硅藻土
油田采出水
吸附
COD
diatomite
granular diatomite
oil field produced water
adsorption
COD
