小型浅水湖泊表层沉积物对磷的吸附特征及其影响因素
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摘要
[目的]分析城市小型浅水湖泊表层沉积物对磷的吸附特征及影响因素,为城市小型浅水湖泊富营养化控制和生态环境修复提供参考依据。[方法]在室内模拟条件下,从表层沉积物对磷的吸附动力学与等温吸附两个角度分析了孔目湖表层沉积物对磷的吸附特征,同时运用磷吸附量计算公式探讨不同pH值下孔目湖表层沉积物对磷吸附行为的影响。[结果]表层沉积物对磷的吸附动力学过程分为快吸附和慢吸附2个阶段,快吸附阶段主要发生在0～1h内,而慢吸附阶段主要发生在1～3h;表层沉积物对磷的吸附等温线在高浓度下同时符合Langmuir模型、Freundlich模型和D-R模型,而在低浓度下符合Linear模型;在酸性或中性环境条件下,表层沉积物对磷的吸附效果更好。[结论]富营养化严重的小型浅水湖泊,表层沉积物有向上覆水释放磷的趋势,且上覆水和沉积物中磷酸盐含量的多少均会影响表层沉积物对磷的吸附特征和动态平衡状态的变化。
[Objective]The objective of this paper was to analyze the characteristics and influencing factors of phosphorus adsorption on surface sediment of small shallow lake,and provide decision basis for eutrophication control and ecological environment restoration of small shallow lake.[Methods]Adsorption characteristics of phosphorus on surface sediments samples taken from Kongmu Lake was determined by adsorption kinetics and isothermal adsorption,and the adsorption behavior of phosphorus at different pH values was determined by calculation formula of phosphorus adsorption capacity.[Results]Adsorption kinetics of phosphorus on the surface sediments was divided into two stage:the rapid adsorption stage occurred in 0～1h,while the slow adsorption stage occurred in 1～3h.Adsorption isotherm curves was fitted into Langmuir model,Freundlich model and D-R model under high concentration conditions,while fitted into Linear equation under low concentration conditions.Under acidic or neutral environmental conditions,surface sediments has better phosphorus adsorption effect.[Conclusion]The surface sediments from small,eutrophic shallow lake has the trend to release phosphorus into the overlying water.The amount of phosphate in overlying water and sediments will affect the adsorption characteristics and dynamic equilibrium of phosphorus in surface sediments.
[Objective]The objective of this paper was to analyze the characteristics and influencing factors of phosphorus adsorption on surface sediment of small shallow lake,and provide decision basis for eutrophication control and ecological environment restoration of small shallow lake.[Methods]Adsorption characteristics of phosphorus on surface sediments samples taken from Kongmu Lake was determined by adsorption kinetics and isothermal adsorption,and the adsorption behavior of phosphorus at different pH values was determined by calculation formula of phosphorus adsorption capacity.[Results]Adsorption kinetics of phosphorus on the surface sediments was divided into two stage:the rapid adsorption stage occurred in 0～1h,while the slow adsorption stage occurred in 1～3h.Adsorption isotherm curves was fitted into Langmuir model,Freundlich model and D-R model under high concentration conditions,while fitted into Linear equation under low concentration conditions.Under acidic or neutral environmental conditions,surface sediments has better phosphorus adsorption effect.[Conclusion]The surface sediments from small,eutrophic shallow lake has the trend to release phosphorus into the overlying water.The amount of phosphate in overlying water and sediments will affect the adsorption characteristics and dynamic equilibrium of phosphorus in surface sediments.
引文
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[22]何宗健,刘文斌,王圣瑞,等.洱海表层沉积物吸附磷特征[J].环境科学研究,2011,24(11):1242-1248.
[23]陈春瑜,徐晓梅,邓伟明,等.滇池表层沉积物对磷的吸附特征[J].环境科学学报,2014,34(12):3065-3075.
[24]安文超,李小明.南四湖及主要入湖河流表层沉积物对磷酸盐的吸附特征[J].环境科学,2008,29(5):1295-1302.
[25]江敏,刘金金,胡文婷,等.滴水湖沉积物对磷的吸附特性初探[J].环境科学与技术,2012,35(5):18-23.
[26]吕昌伟,孟婷婷,张细燕,等.磷在不同类型湖泊沉积物上的吸附特征及形态再分布研究[J].农业环境科学学报,2012,31(2):402-409.
[27]王爱萍,杨守业,周琪.长江口崇明东滩湿地沉积物对磷的吸附特征[J].生态学杂志,2006,25(8):926-930.
[28] Tang Hu,Zhou Weijie,Zhang Lina.Adsorption isotherms and kinetics studies of malachite green on chitin hydrogels[J].Journal of Hazardous Materials,2012,209/210(1):218-225.
[29] Dawood S,Sen T K.Removal of anionic dye Congo red from aqueous solution by raw pine and acid-treated pine cone powder as adsorbent:Equilibrium,thermodynamic,kinetics,mechanism and process design[J].Water Research,2012,46(13):1933-1946.
[30] Lucci G M,Mcdowell R W,Condron L M.Evaluation of base solutions to determine equilibrium phosphorus concentrations(EPC0)in stream sediments[J].International Agrophysics,2010,24(2):157-163.
[31] Liu Yu,Shen Liang.From Langmuir kinetics to first and second-order rate equations for adsorption[J].Langmuir,2008,24(20):11625-11630.
[32]黄利东,柴如山,宗晓波,等.不同初始磷浓度下湖泊沉积物对磷吸附的动力学特征[J].浙江大学学报:农业与生命科学版,2012,38(1):81-90.
[33]王振华,王圣瑞,刘元英,等.Fe和Al对湖泊沉积物中磷赋存形态的影响[J].环境科学研究,2012,25(5):556-562.
[34]揣小明,杨柳燕,程书波,等.太湖和呼伦湖沉积物对磷的吸附特征及影响因素[J].环境科学,2014,35(3):951-957.
[35] Karthikeyan K G,Tshabalala M A,Wang D,et al.Solution chemistry effects on orthophosphate adsorption by cationized solid wood residues[J].Environmental Science&Technology,2004,38(3):904-911.
[2] Del N M,Galindo C,Barillon R,et al.Surface reactivity of alpha-Al2O3 and mechanisms of phosphate sorption:In situ ATR-FTIR spectroscopy and zeta potential studies[J].Journal of Colloid&Interface Science,2010,342(2):437-444.
[3]近藤精一,石川达雄,安部郁夫.吸附科学[M].北京:化学工业出版社,2006.
[4]龚莹,王宁,李玉成,等.巢湖水体-沉积物磷形态与有效性[J].生态与农村环境学报,2015(3):359-365.
[5] Wang Lingqing,Liang Tao,Zhong Buqing,et al.Study on nitrogen dynamics at the sediment-water interface of Dongting Lake, China[J]. Aquatic Geochemistry,2014,20(5):501-517.
[6] Hooda P S,Rendell A R,Edwards A C,et al.Relating soil phosphorus indices to potential phosphorus release to water[J].Journal of Environmental Quality,2000,29(4):1161-1171.
[7] Zhou Aimin,Tang Hongxiao,Wang Dongsheng.Phosphorus adsorption on natural sediments:Modeling and effects of pH and sediment composition[J].Water Research,2005,39(7):1245-1254.
[8] Kerr J G,Burford M,Olley J,et al.Phosphorus sorption in soils and sediments:Implications for phosphate supply to a subtropical river in southeast Queensland,Australia[J].Biogeochemistry,2011,2(1/3):73-85.
[9]金相灿,姜霞,王琦,等.太湖梅梁湾沉积物中磷吸附/解吸平衡特征的季节性变化[J].环境科学学报,2008,28(1):24-30.
[10] Noahr L,Emilyh S.Benthic sediment influence on dissolved phosphorus concentrations in a headwater stream[J].Biogeochemistry,2007,84(3):297-309.
[11]Wang Shengrui,Jin Xiangcan,Bu Qingyun,et al.Effects of particle size,organic matter and ionic strength on the phosphate sorption in different trophic lake sediments[J].Journal of Hazardous Materials,2006,28(2/3):95-105.
[12]Wang Xiaoyun,Zhang Liping,Zhang Hesi,et al.Phosphorus adsorption characteristics at the sedimentwater interface and relationship with sediment properties in FUSHI reservoir,China[J].Environmental Earth Sciences,2012,67(1):15-22.
[13] Jalali M,Matin N H.Sorption of phosphorus in calcareous paddy soils of Iran:Effects of soil/solution ratio and pH[J].Environmental Earth Sciences,2015,73(5):2047-2059.
[14] Gerke J.Humic(organic matter)-Al(Fe)-phosphate complexes:An underestimated phosphate form in soils and source of plant-available phosphate[J].Soil Science,2010,175(9):417-425.
[15] Wang Shengrui,Jin Xiangcan,Pang Yan,et al.The study of the effect of pH on phosphate sorption by different trophic lake sediments[J].Journal of Colloid&Interface Science,2005,285(2):448-457.
[16] Pant H K,Reddy K R.Phosphorus sorption characteristics of estuarine sediments under different redox conditions[J].Journal of Environmental Quality,2001,30(4):1474-1480.
[17] SH U,Postma D,Jakobsen R,et al.Sorption of phosphate onto calcite;results from batch experiments and surface complexation modeling[J].Geochimica Et Cosmochimica Acta,2011,75(10):2911-2923.
[18] Penn C J,Zhang H L.Isothermal titration calorimetry as an indicator of phosphorus sorption behavior[J].Soil Science Society of America Journal,2010,74(2):502-511.
[19] Lopez P,Lluch X,Vidal M,et al.Adsorption of phosphorus on sediments of the Balearic Islands(Spain)related to their composition[J].Estuarine Coastal&Shelf Science,1996,42(2):185-196.
[20]高丽,侯金枝,宋鹏鹏.天鹅湖沉积物对磷的吸附动力学及等温吸附特征[J].土壤,2013,45(1):67-72.
[21]Ho Y S,Mckay G.Pseudo-second order model for sorption processes[J].Process Biochemistry,1999,34(5):451-465.
[22]何宗健,刘文斌,王圣瑞,等.洱海表层沉积物吸附磷特征[J].环境科学研究,2011,24(11):1242-1248.
[23]陈春瑜,徐晓梅,邓伟明,等.滇池表层沉积物对磷的吸附特征[J].环境科学学报,2014,34(12):3065-3075.
[24]安文超,李小明.南四湖及主要入湖河流表层沉积物对磷酸盐的吸附特征[J].环境科学,2008,29(5):1295-1302.
[25]江敏,刘金金,胡文婷,等.滴水湖沉积物对磷的吸附特性初探[J].环境科学与技术,2012,35(5):18-23.
[26]吕昌伟,孟婷婷,张细燕,等.磷在不同类型湖泊沉积物上的吸附特征及形态再分布研究[J].农业环境科学学报,2012,31(2):402-409.
[27]王爱萍,杨守业,周琪.长江口崇明东滩湿地沉积物对磷的吸附特征[J].生态学杂志,2006,25(8):926-930.
[28] Tang Hu,Zhou Weijie,Zhang Lina.Adsorption isotherms and kinetics studies of malachite green on chitin hydrogels[J].Journal of Hazardous Materials,2012,209/210(1):218-225.
[29] Dawood S,Sen T K.Removal of anionic dye Congo red from aqueous solution by raw pine and acid-treated pine cone powder as adsorbent:Equilibrium,thermodynamic,kinetics,mechanism and process design[J].Water Research,2012,46(13):1933-1946.
[30] Lucci G M,Mcdowell R W,Condron L M.Evaluation of base solutions to determine equilibrium phosphorus concentrations(EPC0)in stream sediments[J].International Agrophysics,2010,24(2):157-163.
[31] Liu Yu,Shen Liang.From Langmuir kinetics to first and second-order rate equations for adsorption[J].Langmuir,2008,24(20):11625-11630.
[32]黄利东,柴如山,宗晓波,等.不同初始磷浓度下湖泊沉积物对磷吸附的动力学特征[J].浙江大学学报:农业与生命科学版,2012,38(1):81-90.
[33]王振华,王圣瑞,刘元英,等.Fe和Al对湖泊沉积物中磷赋存形态的影响[J].环境科学研究,2012,25(5):556-562.
[34]揣小明,杨柳燕,程书波,等.太湖和呼伦湖沉积物对磷的吸附特征及影响因素[J].环境科学,2014,35(3):951-957.
[35] Karthikeyan K G,Tshabalala M A,Wang D,et al.Solution chemistry effects on orthophosphate adsorption by cationized solid wood residues[J].Environmental Science&Technology,2004,38(3):904-911.