摘要
利用CaO2进行底泥修复,在实验室模拟条件下,研究了2种不同的CaO2投加方式(混匀和覆盖)上覆水活性磷酸盐(SRP)的变化趋势,并通过底泥磷形态之间的转变来分析其不同效果的原因.结果表明,混匀条件和覆盖条件下上覆水的SRP浓度呈现2种不同的变化趋势,前者先降低后增加而后者则持续降低,平均释放速率分别为6.077 mg/(m2.d)和-0.879mg/(m2.d).底泥磷的分级提取实验结果表明,铁磷的不同变化趋势是CaO2投加方式引起底泥磷释放不同效果的内在原因.
Calcium peroxide is applied to sediment remediation. Based on laboratory-simulated test, trend of soluble reactive phosphorus （SRP） concentration in overlying was measured after two means of calcium peroxide treatment, mixing and capping. Transformation among different phosphorus fractions in the sediments was studied to analyze the distinguished effect. The results show that SRP concentration in overlying water presents different trend after mixing and capping of calcium peroxide. SRP concentration of the former decreased at first and increased subsequently, while that of the latter kept decreasing and average release velocity of SRP was 6.077 mg/（m^2·d） and -0.879mg/（m^2·d） respectively. The transformation of phosphorus fractions in the sediments shows that diverse change of iron-bound phosphate are deemed to cause the effect under different adding options of calcium peroxide.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第11期2188-2193,共6页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2003AA06011000-4-12)
国家'十五'科技攻关计划项目(2003BA808A17)
关键词
富营养化
底泥
过氧化钙
磷形态
eutrophication
sediment
calcium peroxide
phosphorus fractions
