鄱阳湖滨岸土壤磷素吸附特征研究
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摘要
分层采集鄱阳湖近水滨岸土壤进行磷的吸附动力学及等温吸附试验,探讨不同位置滨岸土壤的总磷(TP)含量及其对磷吸附解吸特性的差异。结果表明:不同滨岸带土壤TP差异极显著(F=7. 103,p <0. 01),赣江入湖口滨岸土壤总磷含量显著高于其他滨岸土壤,且0～20 cm土层TP含量(635 mg·kg~(-1))>20～40 cm土层(393 mg·kg~(-1))。各滨岸土壤的磷素动力学过程相似:即分为"快速吸附(0～2 h)"、"缓慢吸附(2～24 h)"与"吸附平台(> 24 h)"3个阶段,平衡吸附量(Q_e)最大值为216. 0 mg·kg~(-1); Langmuir模型对磷的等温吸附拟合度为0. 951～0. 995,表层土壤最大吸附量(Q_(max))高于下层土壤,饶河(629. 12 mg·kg~(-1))吸附量最大,康山大堤(340. 72 mg·kg~(-1))最小。滨岸表层土壤吸附解吸平衡浓度(EPC0)小于0. 1 mg·L~(-1),磷流失风险较小,东部滨岸土壤对外源磷的缓冲能力优于西南滨岸土壤,最大吸附量与TP呈现极显著正相关。
Riparian soils surrounding Poyang Lake were stratified collected for phosphorus adsorption kinetics study and the experiment of isothermal adsorption. The results of this experiment were then analyzed and fitted. It shows that,the concentrations of soil total phosphorus from different riparian zones varies greatly( F = 7. 103,p<0. 01). The content of total phosphorus in riparian soil of the Gan River entrance is significantly higher than those of other riparian soils. Meanwhile,total phosphorus content of at the 0 ～ 20 cm depth( 635 mg·kg~(-1)) is higher than that at the 20 ～ 40 cm depth( 393 mg·kg~(-1)). Phosphorus adsorption kinetics in different riparian soils have similar trends. During 0 ～ 2 h,soils quickly adsorbed the phosphorus in the solution; during 2 ～ 24 h,the adsorption of phosphorus in soils decreased; after 24 hours,the tendency of phosphorus adsorption gradually flatted. The maximum value of equilibrium adsorption capacity( Qe) is 216. 0 mg · kg~(-1). The isothermal adsorption fitting degree of Langmuir model for phosphorus is 0. 951 ～ 0. 995,which indicates that the maximum adsorption capacity( Q_(max)) of surface soils is higher than that of the subsurface soils. Soils from the Rao River entrance have the largest amount of adsorption( 629. 12 mg · kg~(-1)),while soils from the Thornhill have the smallest amount of adsorption( 340. 72 mg · kg~(-1)). The equilibrium phosphate concentration( EPC0) of the surface soils in the riparian of Poyang Lake is less than 0. 1 mg·L~(-1). So the risk of phosphorus loss is small. The buffering capacity of exogenous phosphorus in the eastern riparian soils is better than that of the southwest riparian soils. Last but not least,the maximum adsorption capacity is positively correlated with TP.
Riparian soils surrounding Poyang Lake were stratified collected for phosphorus adsorption kinetics study and the experiment of isothermal adsorption. The results of this experiment were then analyzed and fitted. It shows that,the concentrations of soil total phosphorus from different riparian zones varies greatly( F = 7. 103,p<0. 01). The content of total phosphorus in riparian soil of the Gan River entrance is significantly higher than those of other riparian soils. Meanwhile,total phosphorus content of at the 0 ～ 20 cm depth( 635 mg·kg~(-1)) is higher than that at the 20 ～ 40 cm depth( 393 mg·kg~(-1)). Phosphorus adsorption kinetics in different riparian soils have similar trends. During 0 ～ 2 h,soils quickly adsorbed the phosphorus in the solution; during 2 ～ 24 h,the adsorption of phosphorus in soils decreased; after 24 hours,the tendency of phosphorus adsorption gradually flatted. The maximum value of equilibrium adsorption capacity( Qe) is 216. 0 mg · kg~(-1). The isothermal adsorption fitting degree of Langmuir model for phosphorus is 0. 951 ～ 0. 995,which indicates that the maximum adsorption capacity( Q_(max)) of surface soils is higher than that of the subsurface soils. Soils from the Rao River entrance have the largest amount of adsorption( 629. 12 mg · kg~(-1)),while soils from the Thornhill have the smallest amount of adsorption( 340. 72 mg · kg~(-1)). The equilibrium phosphate concentration( EPC0) of the surface soils in the riparian of Poyang Lake is less than 0. 1 mg·L~(-1). So the risk of phosphorus loss is small. The buffering capacity of exogenous phosphorus in the eastern riparian soils is better than that of the southwest riparian soils. Last but not least,the maximum adsorption capacity is positively correlated with TP.
引文
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[15]潘成荣,张之源,叶琳琳,等.环境条件变化对瓦埠湖沉积物磷释放的影响[J].水土保持学报,2006,20(6):148-152.PAN C R,ZHANG Z Y,YE L L,et al. Effects of environmental factor on phosphorus release from sediments in Wabuhu Lake[J]. Journal of Soil and Water Conservation,2006,20(6):148-152.
[16]何宗健,吴志强,倪兆奎,等.江湖关系变化对鄱阳湖沉积物氨氮释放风险的影响[J].中国环境科学,2014,34(5):1277-1284.HE Z J,WU Z Q,NI Z Q,et al. The influence of the riverlake relation changed on the sediments ammonia nitrogen release risk of Poyang Lake.[J]. China Environmental Science,2014,34(5):1277-1284.
[17] MA D,CHEN J,ZHANG W,et al. Farmers’vulnerability to flood risk[J]. Journal of Geographical Sciences,2007,17(3):269-284.
[18]唐丹,张展羽,夏继红,等.鄱阳湖滨岸带对N素的净化及其影响因素[J].水资源保护,2018(3):85-90.TANG D,ZHANG Z Y,XIA J H,et al. Purification of N and its influencing factors by Poyang Lake riparian zone[J]. Water Resources Protection,2018(3):85-90.
[19] ZHOU A,TANG H,WANG D. Phosphorus adsorption on natural sediments:Modeling and effects of pH and sediment composition[J]. Water Research,2005,39(7):1245-1254.
[20] LIU F,XIAO R,WANG Y,et al. Effect of a novel constructed drainage ditch on the phosphorus sorption capacity of ditch soils in an agricultural headwater catchment in subtropical central China[J]. Ecological Engineering,2013,58(13):69-76.
[21] ZHANG L,DU C,DU Y,et al. Kinetic and isotherms studies of phosphorus adsorption onto natural riparian wetland sediments:linear and non-linear methods[J]. Environmental Monitoring&Assessment,2015,187(6):381.
[22]武晓飞,李大鹏,汪明,等.反复扰动下加藻对不同形态磷相互转化的影响[J].中国环境科学,2015(4):1187-1196.WU X F,LI D P,WANG M,et al. Migration and transformation of phosphorus forms under dual effect of sediment resuspension and the addition of algae[J]. China Environmental Science,2015(4):1187-1196.
[23] JASONG K,MICHELE B,JON O,et al. Phosphorus sorption in soils and sediments:Implications for phosphate supply to a subtropical river in southeast Queensland,Australia[J]. Biogeochemistry,2011,102(1-3):73-85.
[24] LOTTIG N R,STANLEY E H. Benthic sediment influence on dissolved phosphorus concentrations in a headwater stream[J].Biogeochemistry,2007,84(3):297-309.
[25]张宪伟,潘纲,王晓丽,等.内蒙古段黄河沉积物对磷的吸附特征研究[J].环境科学,2009,30(1):172-177.ZAHNG X W,PAN G,WANG X L,et al. Characteristics of phosphorus sorption on Yellow River sediments from Inner Mongolia reach[J]. Environmental Science,2009,30(1):172-177.
[26]邱亚群,甘国娟,刘伟,等.不同利用方式土壤中磷的吸附与解吸特性[J].环境工程学报,2013(7):2757-2762.QIU Y Q,GAN G J,LIU W,et al. Characteristics of phosphate adsorption and desorption in soils under different utilization[J].Chinese Journal of Environmental Engineering, 2013(7):2757-2762.
[27]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.HUANG L D,CHAI R S,ZONG X B,et al. Characteristics of phosphorus adsorption kinetics on sediments at different initial phosphorus concentrations[J]. Journal of Zhejiang University(Agric.&Life Sci.),2012,38(1):81-90.
[28]高敏,张生,罗强,等.乌粱素海不同粒径沉积物吸附磷实验研究[J].环境工程,2011,29(6):107-109.GAO M,ZHANG S,LUO Q,et al. Study on phosphate sorption of the different particle size fractions in the sediments from Wuliangsu Lake[J]. Environmental Engineering,2011,29(6):107-109.
[29]刘足根,张萌,李雄清,等.沉水-挺水植物镶嵌组合的水体氮磷去除效果研究[J].长江流域资源与环境,2015(S1):171-181.LIU Z G,ZHANG M,LI X Q,et al. Nitrogen and phosphorus removal of eutrophic water by the mosaic system of submergedemergent plants[J]. Resources and Environment in the Yangtze Basin,2015(S1):171-181.
[30]诸葛祥真,毕春娟,陈振楼,等.上海滴水湖周边土壤和沉积物对磷的吸附特征[J].环境科学,2014(4):1531-1539.ZHUGE X Z,BI C J,CHEN Z L,et al. Phosphorus adsorption characteristics of soils and sediments surrounding Dishui Lake in Shanghai[J]. Environmental Science,2014(4):1531-1539.
[31]张树楠,贾兆月,肖润林,等.生态沟渠底泥属性与磷吸附特性研究[J].环境科学,2013(3):1101-1106.ZHANG S N,JIA Z Y,XIAO R L,et al. Study on phosphorus adsorption characteristic of sediments in an ecological ditch[J].Environmental Science,2013(3):1101-1106.
[32]姚扬,金相灿,姜霞,等.光照对湖泊沉积物磷释放及磷形态变化的影响研究[J].环境科学研究,2004(S1):30-33.YAO Y,JIN X C,JIANG X,et al. Study on effects of light on phosphorus release and phosphorus form change in lake sediments[J]. Research of Environmental Sciences,2004(S1):30-33.
[33]刘凯,倪兆奎,王圣瑞,等.鄱阳湖不同高程沉积物中磷形态特征研究[J].中国环境科学,2015(3):856-861.LIU K,NI Z K,WANG S R,et al. Distribution characteristics of phosphorus in sediments at different altitudes of Poyang Lake[J]. China Environmental Science,2015(3):856-861.
[2]王圣瑞,金相灿,赵海超,等.长江中下游浅水湖泊沉积物对磷的吸附特征[J].环境科学,2005,26(3):38-43.WANG S R,JIN X C,ZHAO H C,et al. Phosphate adsorption characteristics onto the sediments from shallow lakes in the middle and lower reaches of the Yangtze River[J]. Environmental Science,2005,26(3):38-43.
[3]宋林旭,刘德富,肖尚斌.三峡库区香溪河流域非点源营养盐输出变化的试验研究[J].长江流域资源与环境,2011(8):990-996.SONG L X,LIU D F,XIAO S B. Experimental study on nonpoint source nutrient output from Xiang Xi River Basin in Three Gorges Reservoir[J]. Resources and Environment in the Yangtze Basin,2011(8):990-996.
[4]胡鹏,祝洪凯,刘春光,等.天津滨海盐碱地区水库沉积物磷释放动力学研究[J].水资源与水工程学报,2013,24(3):125-129.HU P,ZHU H K,LIU C G,et al. Research on kinetics of phosphorus release from sediments of reservoir in coastal saline areas of Tianjin[J]. Journal of Water Resources and Water Engineering,2013,24(3):125-129.
[5] HUANG L,FU L,JIN C,et al. Effect of temperature on phosphorus sorption to sediments from shallow eutrophic lakes[J].Ecological Engineering,2011,37(10):1515-1522.
[6]赵鹏,胡艳芳,林峻宇.不同河岸带修复策略对氮磷非点源污染的净化作用[J].中国环境科学,2015(7):2160-2170.ZHAO P,HU Y F,LIN J Y. Reduction rate of nitrogen and phosphorus non-point source pollution under different riparian buffer restoring strategies.[J]. China Environmental Science,2015(7):2160-2170.
[7]夏黎莉.鄱阳湖沉积物中磷的形态及吸附释放特征研究[D].南昌大学,2007.XIA L L. Study on the phosphorus forms and character of phosphorus adsorption and release in sediment of the Poyang Lake[D]. Nanchang University,2007.
[8] GUO S,DANG T,HAO M. Phosphorus changes and sorption characteristics in a calcareous soil under long-term fertilization[J]. Pedosphere,2008,18(2):248-256.
[9] YOO J H,RO H M,CHOI W J,et al. Phosphorus adsorption and removal by sediments of a constructed marsh in Korea[J].Ecological Engineering,2006,27(2):109-117.
[10] TOMENKO V,AHMED S,POPOV V. Modelling constructed wetland treatment system performance[J]. Ecological Modelling,2007,205(3-4):355-364.
[11] CONDRON L M,NEWMAN S. Revisiting the fundamentals of phosphorus fractionation of sediments and soils[J]. Journal of Soils&Sediments,2011,11(5):830-840.
[12] FORTUNE S,LU J,ADDISCOTT T M,et al. Assessment of phosphorus leaching losses from arable land[J]. Plant&Soil,2005,269(1-2):99-108.
[13]石孝洪,魏世强,谢德体,等.三峡水库消落区土壤磷吸附特征[J].西南大学学报(自然科学版),2004,26(3):331-335.SHI X H,WEI S Q,XIE D L,et al. Characteristics of phosphorus adsorption of the soils in the drawdown area of the Three Gorges Reservoir[J]. Journal Press of Southwest University(Natural Science Edition),2004,26(3):331-335.
[14] YOO J H,RO H M,CHOI W J,et al. Phosphorus adsorption and removal by sediments of a constructed marsh in Korea[J].Ecological Engineering,2006,27(2):109-117.
[15]潘成荣,张之源,叶琳琳,等.环境条件变化对瓦埠湖沉积物磷释放的影响[J].水土保持学报,2006,20(6):148-152.PAN C R,ZHANG Z Y,YE L L,et al. Effects of environmental factor on phosphorus release from sediments in Wabuhu Lake[J]. Journal of Soil and Water Conservation,2006,20(6):148-152.
[16]何宗健,吴志强,倪兆奎,等.江湖关系变化对鄱阳湖沉积物氨氮释放风险的影响[J].中国环境科学,2014,34(5):1277-1284.HE Z J,WU Z Q,NI Z Q,et al. The influence of the riverlake relation changed on the sediments ammonia nitrogen release risk of Poyang Lake.[J]. China Environmental Science,2014,34(5):1277-1284.
[17] MA D,CHEN J,ZHANG W,et al. Farmers’vulnerability to flood risk[J]. Journal of Geographical Sciences,2007,17(3):269-284.
[18]唐丹,张展羽,夏继红,等.鄱阳湖滨岸带对N素的净化及其影响因素[J].水资源保护,2018(3):85-90.TANG D,ZHANG Z Y,XIA J H,et al. Purification of N and its influencing factors by Poyang Lake riparian zone[J]. Water Resources Protection,2018(3):85-90.
[19] ZHOU A,TANG H,WANG D. Phosphorus adsorption on natural sediments:Modeling and effects of pH and sediment composition[J]. Water Research,2005,39(7):1245-1254.
[20] LIU F,XIAO R,WANG Y,et al. Effect of a novel constructed drainage ditch on the phosphorus sorption capacity of ditch soils in an agricultural headwater catchment in subtropical central China[J]. Ecological Engineering,2013,58(13):69-76.
[21] ZHANG L,DU C,DU Y,et al. Kinetic and isotherms studies of phosphorus adsorption onto natural riparian wetland sediments:linear and non-linear methods[J]. Environmental Monitoring&Assessment,2015,187(6):381.
[22]武晓飞,李大鹏,汪明,等.反复扰动下加藻对不同形态磷相互转化的影响[J].中国环境科学,2015(4):1187-1196.WU X F,LI D P,WANG M,et al. Migration and transformation of phosphorus forms under dual effect of sediment resuspension and the addition of algae[J]. China Environmental Science,2015(4):1187-1196.
[23] JASONG K,MICHELE B,JON O,et al. Phosphorus sorption in soils and sediments:Implications for phosphate supply to a subtropical river in southeast Queensland,Australia[J]. Biogeochemistry,2011,102(1-3):73-85.
[24] LOTTIG N R,STANLEY E H. Benthic sediment influence on dissolved phosphorus concentrations in a headwater stream[J].Biogeochemistry,2007,84(3):297-309.
[25]张宪伟,潘纲,王晓丽,等.内蒙古段黄河沉积物对磷的吸附特征研究[J].环境科学,2009,30(1):172-177.ZAHNG X W,PAN G,WANG X L,et al. Characteristics of phosphorus sorption on Yellow River sediments from Inner Mongolia reach[J]. Environmental Science,2009,30(1):172-177.
[26]邱亚群,甘国娟,刘伟,等.不同利用方式土壤中磷的吸附与解吸特性[J].环境工程学报,2013(7):2757-2762.QIU Y Q,GAN G J,LIU W,et al. Characteristics of phosphate adsorption and desorption in soils under different utilization[J].Chinese Journal of Environmental Engineering, 2013(7):2757-2762.
[27]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.HUANG L D,CHAI R S,ZONG X B,et al. Characteristics of phosphorus adsorption kinetics on sediments at different initial phosphorus concentrations[J]. Journal of Zhejiang University(Agric.&Life Sci.),2012,38(1):81-90.
[28]高敏,张生,罗强,等.乌粱素海不同粒径沉积物吸附磷实验研究[J].环境工程,2011,29(6):107-109.GAO M,ZHANG S,LUO Q,et al. Study on phosphate sorption of the different particle size fractions in the sediments from Wuliangsu Lake[J]. Environmental Engineering,2011,29(6):107-109.
[29]刘足根,张萌,李雄清,等.沉水-挺水植物镶嵌组合的水体氮磷去除效果研究[J].长江流域资源与环境,2015(S1):171-181.LIU Z G,ZHANG M,LI X Q,et al. Nitrogen and phosphorus removal of eutrophic water by the mosaic system of submergedemergent plants[J]. Resources and Environment in the Yangtze Basin,2015(S1):171-181.
[30]诸葛祥真,毕春娟,陈振楼,等.上海滴水湖周边土壤和沉积物对磷的吸附特征[J].环境科学,2014(4):1531-1539.ZHUGE X Z,BI C J,CHEN Z L,et al. Phosphorus adsorption characteristics of soils and sediments surrounding Dishui Lake in Shanghai[J]. Environmental Science,2014(4):1531-1539.
[31]张树楠,贾兆月,肖润林,等.生态沟渠底泥属性与磷吸附特性研究[J].环境科学,2013(3):1101-1106.ZHANG S N,JIA Z Y,XIAO R L,et al. Study on phosphorus adsorption characteristic of sediments in an ecological ditch[J].Environmental Science,2013(3):1101-1106.
[32]姚扬,金相灿,姜霞,等.光照对湖泊沉积物磷释放及磷形态变化的影响研究[J].环境科学研究,2004(S1):30-33.YAO Y,JIN X C,JIANG X,et al. Study on effects of light on phosphorus release and phosphorus form change in lake sediments[J]. Research of Environmental Sciences,2004(S1):30-33.
[33]刘凯,倪兆奎,王圣瑞,等.鄱阳湖不同高程沉积物中磷形态特征研究[J].中国环境科学,2015(3):856-861.LIU K,NI Z K,WANG S R,et al. Distribution characteristics of phosphorus in sediments at different altitudes of Poyang Lake[J]. China Environmental Science,2015(3):856-861.
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