THERMOCHEMICAL NITRATE DESTRUCTION

被引：31

作者：

COX, JL

HALLEN, RT

LILGA, MA

机构：

[1] Pacific Northwest Laboratory, Richland

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1994年 / 28卷 / 03期

关键词：

Ammonia - Glucose - Hydrogen - Methane - pH effects - Reduction - Urea - Waste treatment;

D O I：

10.1021/es00052a013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The thermochemical destruction of nitrate was conducted in an aqueous media. Six reducing agents (ammonia, formate, urea, glucose, methane, and hydrogen) were mixed separately with 3 wt % NO3- buffered aqueous solutions at pH 13; ammonia and formate were also mixed at pH 4. Reactions were conducted in a batch reactor in the absence of air at temperatures of 200-350-degrees-C and pressures of 600-2800 psig. Reaction times varied from 0.5 to 3.0 h. Both gas and liquid samples from the reaction were analyzed. The specific components analyzed were nitrate, nitrite, nitrous oxide, nitrogen, and ammonia. The observed order of nitrate reduction effectiveness in basic solution was formate > glucose > urea > hydrogen > ammonia almost-equal-to methane. Ammonia was more effective under acidic conditions than basic conditions. Formate was also effective under acidic conditions.

引用

页码：423 / 428

页数：6