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| 不同pH值条件下人工合成铁氧化物对磷的吸附特性 | |
| 引用本文： | 韩巍,梁成华,杜立宇,刘丽,吴玉梅,安宁.不同pH值条件下人工合成铁氧化物对磷的吸附特性[J].浙江农业学报,2010,22(1). |
| 作者姓名： | 韩巍 梁成华 杜立宇 刘丽 吴玉梅 安宁 |
| 作者单位： | 1. 沈阳农业大学,土地与环境学院,辽宁,沈阳,110161 2. 沈阳市环境技术评估中心,辽宁,沈阳,110014 3. 阜新市清河门区清河街道办事处,辽宁,阜新,123006 |
| 基金项目： | 国家自然科学基金项目 |
| 摘 要： | 以人工合成的针铁矿和水铁矿为研究对象,就结晶态和无定形态铁氧化物在不同pH值(5,6,7)条件下对磷素的等温吸附特性及Langmuir方程和Freundlich方程对铁氧化物吸附磷的拟合效果进行了研究。结果表明,两种铁氧化物对磷的吸附特性均可用Langmuir方程和Freundlich方程描述,相关系数均达到0.95以上,呈极显著水平,但Langmuir方程的拟合性优于Freundlich方程。比较磷的最大吸附量(Qmax)、吸附反应常数(KL,KF,n)和最大缓冲容量(MBC)可知,在相同pH值时,水铁矿(无定形态)对磷的吸附容量比针铁矿(结晶态)大的多;随着pH值升高,两种铁氧化物对磷的吸附量均降低,且水铁矿的降低趋势明显于针铁矿。 |
| 关 键 词： | 铁氧化物 磷 等温吸附 |
Phosphorus adsorption property onto synthetic iron oxides under different pH conditions |
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| HAN Wei,HANG Cheng-hua,DU Li-yu,LIU Li,WU Yu-mei,AN Ning.Phosphorus adsorption property onto synthetic iron oxides under different pH conditions[J].Acta Agriculturae Zhejiangensis,2010,22(1). | |
| Authors: | HAN Wei HANG Cheng-hua DU Li-yu LIU Li WU Yu-mei AN Ning |
| Institution: | HAN Wei1,LIANG Cheng-hua1,DU Li-yu1,LIU Li2,WU Yu-mei3,AN Ning1(1College of L, , Environment,Shenyang Agricultural University,Shenyang 110161,China,2Shenyang Environmental Technology Evaluation Center,Shenyang 110014,3Qinghe Sub-district Office of Fuxin Qinghemen District,Fuxin 123006,China) |
| Abstract: | In this study,the adsorption of phosphorus onto both crystal and amorphous iron oxides under different pH conditions (i.e. pH=5,6 and 7) had been investigated using synthetic goethite and ferrihydrite as the materials,respectively. Both Langmuir and Freundlich models were employed to fit the experimental adsorption data to identify the best model. The experimental results showed that these two iron oxides had good adsorption capacity for phosphorus. The modeling results indicated that both models were able ... |
| Keywords: | iron oxides phosphorus isothermal adsorption |
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