硅藻土-无定形碳-氧化铁三元复合体系降解三硝基甲苯的研究  

The removal of TNT by ternary composite materials of diatomite-amorphous carbon-iron

作　　者：孙仕勇[1,2] 付琪智[1,2] 宋绵新[1] 谭道永[1] 袁路[1,2] 张杰[1,2] 董发勤[1] 陈廷芳[1] 

机构地区：[1]固体废物处理与资源化省部共建教育部重点实验室,西南科技大学,四川绵阳621010 [2]西南科技大学环境与资源学院地质与矿物工程系,四川绵阳621010

出　　处：《岩石矿物学杂志》2015年第6期901-906,共6页Acta Petrologica et Mineralogica

基　　金：国家自然科学基金资助项目(41472310);四川省科技厅资助项目(2012JYZ002,2013FZ0018);四川省大学生创新创业训练资助项目(201410619005)

摘　　要：煤系共伴生非金属矿产开发及综合利用难度大。本文针对先锋褐煤共伴生硅藻土高有机质、高铁的特点,提出硅藻土原矿经提纯处理后,在N2作为保护气氛下,高温煅烧形成硅藻土-无定形碳-氧化铁三元复合材料,在类Fenton体系下,去除TNT污染物的开发利用技术路线。本文考察了硅藻土处理条件、反应时间、H2O2浓度、三元复合硅藻土投加量、pH值等因素对TNT降解效能的影响。研究表明三元复合硅藻土对TNT吸附降解的最佳工艺条件为:硅藻土用量为2 g/L,H2O2(30%)4 m L/L,pH值1,反应时间2.5 h。该工艺条件下,50 mg/L TNT去除率为98%。The comprehensive utilization of the coal-derived mineral resources is faced with technical difficulties. In the present work, the associated diatomite with high organic matter and high iron content in Xianfeng lignite was utilized for removal of TNT in Fenton system. The diatomite after purification was subjected to calcination at high temperature for the formation of ternary composite materials of diatomite-amorphous carbon-iron with N2 as protective atmosphere. The influence factors such as processing conditions of diatomite, reaction time, H2O2 concentration, amount of diatomite and pH values for removal efficiency of TNT were investigated. The opti- mized technological conditions for adsorption and degradation of 50 mg/L with removal rate of 98 % are 2 g/L ternary composite diatomite, 4 mL/L （30%） H2O2, 1 pH and 2.5 h of reaction time.

关 键 词：三硝基甲苯 硅藻土 类Fenton体系 煤系伴生矿 环境矿物学 

分 类 号：TD985[矿业工程—选矿] X754[环境科学与工程—环境工程]