Nitrate reduction by zero-valent metals via column tests.
碩士 === 嘉南藥理科技大學 === 環境工程與科學系碩士班 === 95 === Nitrogen, an essential nutrient for plants, maybe pollutes the groundwater via the transportation from soil with overdosing fertilizer. Nitrate remaining in soil and groundwater could be reduced to form nitrite and N2O, and finally nitrogen gas. The aim of...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2007
|
Online Access: | http://ndltd.ncl.edu.tw/handle/38025152072740960986 |
id |
ndltd-TW-095CNUP5515023 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-095CNUP55150232015-10-13T15:42:15Z http://ndltd.ncl.edu.tw/handle/38025152072740960986 Nitrate reduction by zero-valent metals via column tests. 以管柱試驗探討零價金屬處理水中硝酸鹽之研究 Eing-Ling Tsai 蔡盈鈴 碩士 嘉南藥理科技大學 環境工程與科學系碩士班 95 Nitrogen, an essential nutrient for plants, maybe pollutes the groundwater via the transportation from soil with overdosing fertilizer. Nitrate remaining in soil and groundwater could be reduced to form nitrite and N2O, and finally nitrogen gas. The aim of this study is to observe the reduction of aqueous nitrate by using zero-valent metals, which has some strength of low cost and prompt reaction. Results of column tests indicate the reduction of nitrate by microscale zero-valent iron could be more efficient under the initial condition of controlled pH (2.5) than uncontrolled pH (6.05-6.17). Results also reveal that the addition of sodium borohydride is an effective regeneration method for activating the used and oxidized iron particles, especially under the condition of uncontrolled pH (near 9.78). However, the addition of ferrous ion and h ydrochloric acid could not be efficient for the regeneration of irons. The specific reduction of nitrate by nanoscale zero-valent iron was found little difference under different inflow flux. The available operation time with high reduction efficiency in iron-packed column was found longer in high inflow flux than low flux. Kuang-Chung Yu 余光昌 2007 學位論文 ; thesis 115 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 嘉南藥理科技大學 === 環境工程與科學系碩士班 === 95 === Nitrogen, an essential nutrient for plants, maybe pollutes the groundwater via the transportation from soil with overdosing fertilizer. Nitrate remaining in soil and groundwater could be reduced to form nitrite and N2O, and finally nitrogen gas.
The aim of this study is to observe the reduction of aqueous nitrate by using zero-valent metals, which has some strength of low cost and prompt reaction.
Results of column tests indicate the reduction of nitrate by microscale zero-valent iron could be more efficient under the initial condition of controlled pH (2.5) than uncontrolled pH (6.05-6.17).
Results also reveal that the addition of sodium borohydride is an effective regeneration method for activating the used and oxidized iron particles, especially under the condition of uncontrolled pH (near 9.78). However, the addition of ferrous ion and h ydrochloric acid could not be efficient for the regeneration of irons.
The specific reduction of nitrate by nanoscale zero-valent iron was found little difference under different inflow flux. The available operation time with high reduction efficiency in iron-packed column was found longer in high inflow flux than low flux.
|
author2 |
Kuang-Chung Yu |
author_facet |
Kuang-Chung Yu Eing-Ling Tsai 蔡盈鈴 |
author |
Eing-Ling Tsai 蔡盈鈴 |
spellingShingle |
Eing-Ling Tsai 蔡盈鈴 Nitrate reduction by zero-valent metals via column tests. |
author_sort |
Eing-Ling Tsai |
title |
Nitrate reduction by zero-valent metals via column tests. |
title_short |
Nitrate reduction by zero-valent metals via column tests. |
title_full |
Nitrate reduction by zero-valent metals via column tests. |
title_fullStr |
Nitrate reduction by zero-valent metals via column tests. |
title_full_unstemmed |
Nitrate reduction by zero-valent metals via column tests. |
title_sort |
nitrate reduction by zero-valent metals via column tests. |
publishDate |
2007 |
url |
http://ndltd.ncl.edu.tw/handle/38025152072740960986 |
work_keys_str_mv |
AT einglingtsai nitratereductionbyzerovalentmetalsviacolumntests AT càiyínglíng nitratereductionbyzerovalentmetalsviacolumntests AT einglingtsai yǐguǎnzhùshìyàntàntǎolíngjiàjīnshǔchùlǐshuǐzhōngxiāosuānyánzhīyánjiū AT càiyínglíng yǐguǎnzhùshìyàntàntǎolíngjiàjīnshǔchùlǐshuǐzhōngxiāosuānyánzhīyánjiū |
_version_ |
1717767471848488960 |