摘要
试验采用了3种人工合成的氧化铁为材料,研究了氧化铁对磷的吸附以及柠檬酸对氧化铁磷吸附特性的影响。结果表明:3种人工合成的氧化铁对磷的吸附特性及柠檬酸对氧化铁吸附磷的影响都可用Langumir方程来描述,都达到了极显著水平。从磷的最大吸附量(Sm)、吸附反应常数(K)和最大缓冲容量(MBC)来看,未加入柠檬酸时,水铁矿对磷的吸附在容量和强度方面均为最高;而在加入柠檬酸时,3种人工合成的氧化铁对磷的吸附能力的顺序并无差别,水铁矿和针铁矿的磷Sm和MBC要比赤铁矿大很多。
Three synthetic iron oxides （ferrihydrate, goethite and hematite） were conducted to study the effects of citric acid on adsorption of P. The results showed that P adsorption properties of these three synthetic iron oxides and the effects of citric acid on P adsorption could be described by Langumir equation. It was found by comprehensively taking Sm （maximum quantity of adsorption）,K（adsorption constant）,MBC（maximum buffing capacity） into account, ferrihydrate was much larger than crystalline iron oxides in both intensity and capacity of P adsorption on the condition of no citric acid, but on difference of content of goethite and hematite under the application of citric acid.
出处
《土壤通报》
CAS
CSCD
北大核心
2008年第4期801-803,共3页
Chinese Journal of Soil Science
基金
国家自然基金项目资助(项目编号:40771111)
关键词
柠檬酸
人工合成氧化铁
磷
吸附特性
Citric acid
Synthetic iron oxides
P
Adsorption property
