Nitrate removal in wetland microcosms

被引：133

作者：

Ingersoll, TL ^{[1
]}

Baker, LA ^{[1
]}

机构：

[1] Arizona State Univ, Dept Civil & Environm Engn, Tempe, AZ 85287 USA

来源：

WATER RESEARCH | 1998年 / 32卷 / 03期

关键词：

constructed wetlands; nitrate; denitrification; groundwater remediation; trihalomethanes;

D O I：

10.1016/S0043-1354(97)00254-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of hydraulic loading rate (HLR; 5 to 20 cm day(-1)) and carbon addition(1-6 g dried plant material per week) was determined at two temperatures (28 degrees C and 35 degrees C) in 18 flow-through sediment-water wetland microcosms that were fed nitrate-contaminated water (30 mg N L-1). Nitrate removal efficiencies varied from 8% to >95%, decreasing with increasing HLRs and increasing with increasing carbon addition rates. The effect of HLR, and carbon addition rate were integrated into the C:N ratio, which alone was highly predictive of nitrate removal efficiency. As nitrate removal efficiencies increased, dissolved organic carbon in the effluent also increased, as did chloroform formation potential. Nitrate-treatment wetlands may be a feasible method of remediating nitrate-contaminated groundwater. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：677 / 684

页数：8