• ISSN 1008-505X
  • CN 11-3996/S
刘秀梅, 张夫道, 冯兆滨, 张树清, 何绪生, 王茹芳, 王玉军. 风化煤腐殖酸对氮、磷、钾的吸附和解吸特性[J]. 植物营养与肥料学报, 2005, 11(5): 641-646. DOI: 10.11674/zwyf.2005.0512
引用本文: 刘秀梅, 张夫道, 冯兆滨, 张树清, 何绪生, 王茹芳, 王玉军. 风化煤腐殖酸对氮、磷、钾的吸附和解吸特性[J]. 植物营养与肥料学报, 2005, 11(5): 641-646. DOI: 10.11674/zwyf.2005.0512
LIU Xiu-mei, ZHANG Fu-dao, FENG Zhao-bin, ZHANG Shu-qing, HE Xu-sheng, WANG Ru-fang, WANG Yu-jun. N, P and K adsorption and desorption characteristics of humic acids made from the airslake-coal[J]. Journal of Plant Nutrition and Fertilizers, 2005, 11(5): 641-646. DOI: 10.11674/zwyf.2005.0512
Citation: LIU Xiu-mei, ZHANG Fu-dao, FENG Zhao-bin, ZHANG Shu-qing, HE Xu-sheng, WANG Ru-fang, WANG Yu-jun. N, P and K adsorption and desorption characteristics of humic acids made from the airslake-coal[J]. Journal of Plant Nutrition and Fertilizers, 2005, 11(5): 641-646. DOI: 10.11674/zwyf.2005.0512

风化煤腐殖酸对氮、磷、钾的吸附和解吸特性

N, P and K adsorption and desorption characteristics of humic acids made from the airslake-coal

  • 摘要: 研究了风化煤腐殖酸在不同pH值条件下对氮、磷、钾的吸附和解吸特性。结果表明,1)在pH.4~8条件下,随着氮、磷、钾初始处理浓度的增加,腐殖酸对其吸附量和解吸量均呈上升趋势,但解吸率均呈下降趋势;2)在不同pH值的介质溶液中,腐殖酸对氮、磷、钾的吸附和解吸特性不尽相同,其中,在碱性条件下,腐殖酸对氮的吸附和解吸作用较强,在酸性条件下,腐殖酸对磷的吸附和解吸作用较强,而腐殖酸对钾的的吸附和解吸作用在中性条件下更易发生;3)腐殖酸对氮、磷、钾的等温吸附可用Linear、Langmuir和Freundlich三个吸附方程来拟合,相关性达显著或极显著水平,但以Freundlich方程为最优。

     

    Abstract: N, P and K adsorption and desorption characteristics of humic acids, which were made from the efflorescent coal at different pH values were studied in this paper. The major results were summarized as follows: 1) The N, P and K adsorption and desorption amounts of humic acids showed a rising tendency along with the increase of initial concentration of N, P and K at different pH levels (from 4 to 8), but the desorption ratios of them all declined. 2) The characteristics of adsorption and desorption of humic acids on nitrogen, phosphorus, and potassium were variable at different pH, among which N adsorption and desorption capacity became larger particularly under the alkali condition, while under the acid condition, the P adsorption and desorption capacity increased, and K adsorption and desorption of humic acids was easier in the neutral solution. 3) The isothermal adsorption of humic acid on N, P and K could be fitted using Linear, Langmuir, and Frendlich equations with correlation coefficient being significant, among which Frendlich equation was the best.

     

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