| 孙亚乔,钱会,段磊.电厂灰水排放对周边土壤化学组分的影响机理[J].干旱地区农业研究,2010,28(1):99~103 |
| 电厂灰水排放对周边土壤化学组分的影响机理 |
| The effect mechanism of discharge of the ash water from power plant on soil chemical component |
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| DOI：10.7606/j.issn.1000-7601.2010.01.19 |
| 中文关键词: 灰水 黄土 亚砂土 阳离子 溶出机制 |
| 英文关键词:ash water loess sand loam cation dissolution mechanism |
| 基金项目:国家自然科学基金资助项目（40772160） |
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| 中文摘要: |
| 以灞桥电厂灰水为研究对象，分析了电厂灰水排放对周围土壤化学成分的影响。结果表明：黄土比亚砂土对灰水的碱性具有较好的缓冲能力；
亚砂土和黄土的主要阳离子（K+、Na+、Ca2+、Mg2+）溶出/沉积存在明显的区别，其中亚砂土的主要阳离子均呈溶出状态，使可溶性物质溶失，亚砂土的渗透性得到提高，增加了地下水水质恶化的风险性；黄土中Na+、Mg2+表现为溶出，而K+、Ca2+则呈现沉积状态；灰水长期排放，易使物质在土壤中沉积，阻塞孔隙，降低土壤导水率，将对土壤的结构产生不良影响。造成黄土与亚砂土主要阳离子溶出/沉积的主要原因，是土-水系统中物质溶解/沉淀和阳离子交换作用综合作用的结果。 |
| 英文摘要: |
| A leaching experiment was conducted to investigate the effect mechanism of ash water from Baqiao power plant on the soil chemical component. The results show that the loess has better buffering than the sand loam. There are apparent different in dissolution/deposition of K+, Na+, Ca2+ and Mg2+ in loess and sand loam. The cation is dissolute from sand loam and the permeability of sand loam is increasing, so the pollution risk of groundwater is increasing. There are dissolution of Na+, Mg2+ and deposition of K+ and Ca2+ when the loess mixes with the alkaline water. The deposition will pond the pore, decrease the hydraulic conductivity, and affect the constitution of soil, if ash water is discharged for long time. The water-soils chemical action (dissolution/deposition, cation exchanging) is the main reason of the cation dissolution and deposition in loess and sand loam. |
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