外源砷输入对沉积物磷释放及形态转化的影响研究
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摘要
选取云南阳宗海湖滨湿地沉积物为研究对象,外源砷浓度为0.00、0.01、0.05、0.10、0.25、0.50、1.00 mg/L,实验时间设置为短期(1～72 h)和长期(7～15 d),探究外源砷输入对沉积物磷释放及形态转化的影响规律特征。结果表明:外源砷浓度为0～0.25 mg/L时,沉积物对砷的吸附速率较快,以物理吸附为主;在0.25～1 mg/L时,沉积物对砷的吸附速率减缓,以化学吸附为主。随外源砷的浓度升高沉积物磷的释放量先升后降,外源砷浓度为0.25 mg/L时,沉积物磷的释放量达到最大值为0.092 mg/L,超过了地表水质量环境标准Ⅲ类水标准值。外源砷浓度的增加使沉积物中磷形态由惰性态向活性态转化,Al-P和Fe-P含量的增加与外源砷浓度呈显著相关性。外源砷进入会导致沉积物中磷的释放量增加及磷形态由非活性态向活性态转化,增加砷和磷的生态风险。
Selecting the sediments of Yangzonghai Lakeside Wetland in Yunnan as the research object. The concentration of exogenous arsenic was selected from 0.00, 0.01, 0.05, 0.10, 0.25, 0.50, and 1.00 mg/L. The experimental time was set to short-term(1-72 h) and long-term(7-15 d). Exploring the influence of exogenous arsenic input on phosphorus release and morphological transformation of sediments. The results show that when the concentration of exogenous arsenic is 0-0.25 mg/L, the sediment adsorption rate of arsenic is faster, mainly based on physical adsorption. At 0.25-1 mg/L, the adsorption rate of arsenic by sediments is slowed down, mainly by chemical adsorption. With the increase of exogenous arsenic concentration, the release amount of phosphorus in the sediment increase first and then decrease. When the concentration of arsenic is 0.25 mg/L, the maximum amount of phosphorus released from sediment is 0.092 mg/L, exceeding the standard value of Class III water standard for surface water quality and environmental standards. The increase of exogenous arsenic concentration causes the phosphorus form in the sediment to change from inert to active. The increase of Al-P and Fe-P content is significantly correlated with the concentration of arsenic. The entry of exogenous arsenic leads to an increase in the release of phosphorus from the sediment and the conversion of the phosphorus form from inactive to active,increasing the ecological risk of arsenic and phosphorus.
Selecting the sediments of Yangzonghai Lakeside Wetland in Yunnan as the research object. The concentration of exogenous arsenic was selected from 0.00, 0.01, 0.05, 0.10, 0.25, 0.50, and 1.00 mg/L. The experimental time was set to short-term(1-72 h) and long-term(7-15 d). Exploring the influence of exogenous arsenic input on phosphorus release and morphological transformation of sediments. The results show that when the concentration of exogenous arsenic is 0-0.25 mg/L, the sediment adsorption rate of arsenic is faster, mainly based on physical adsorption. At 0.25-1 mg/L, the adsorption rate of arsenic by sediments is slowed down, mainly by chemical adsorption. With the increase of exogenous arsenic concentration, the release amount of phosphorus in the sediment increase first and then decrease. When the concentration of arsenic is 0.25 mg/L, the maximum amount of phosphorus released from sediment is 0.092 mg/L, exceeding the standard value of Class III water standard for surface water quality and environmental standards. The increase of exogenous arsenic concentration causes the phosphorus form in the sediment to change from inert to active. The increase of Al-P and Fe-P content is significantly correlated with the concentration of arsenic. The entry of exogenous arsenic leads to an increase in the release of phosphorus from the sediment and the conversion of the phosphorus form from inactive to active,increasing the ecological risk of arsenic and phosphorus.
引文
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[14]李世玉,刘彬,杨常亮,等.上覆水pH值和总磷浓度对含铁盐的高砷沉积物中砷迁移转化的影响[J].湖泊科学,2015,27(6):1101-1106.
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[19]Rose T J,Hardiputra B,Rengel Z.Wheat,canola and grain legume access to soil phosphorus fractions differs in soils with contrasting phosphorus dynamics[J].Plant and Soil,2010,326(1-2):159-170.
[20]杨文澜,蒋功成,王兆群,等.洪泽湖不同湖区表层沉积物中磷的形态和分布特征[J].地球与环境,2013,41(1):43-49.
[21]高丽,杨浩,周健民,等.滇池沉积物磷的释放以及不同形态磷的贡献[J].农业环境科学学报,2004,23(4):731-734.
[22]王颖,沈珍瑶,呼丽娟,等.三峡水库主要支流沉积物的磷吸附/释放特性[J].环境科学学报,2008,28(8):1654-1661.
[23]吴萍萍.不同类型矿物和土壤对砷的吸附:解吸研究[D].北京:中国农业科学院,2011.
[24]Ahmed Z U,Panaullah G M,Gauch H,et al.Genotype and environment effects on rice(Oryza sativa L.)grain arsenic concentration in Bangladesh[J].Plant and Soil,2011,338(1-2):367-382.
[25]石荣,贾永锋,王承智.土壤矿物质吸附砷的研究进展[J].土壤通报,2007,38(3):584-589.
[2]焦伟,卢少勇,李光德,等.滇池内湖滨带重金属污染及其生态风险评价[J].农业环境科学学报,2010,29(4):740-745.
[3]赵川,和丽萍,李贵祥,等.昆阳磷矿废弃地植被恢复对土壤质量的影响及评价[J].西部林业科学,2018,47(2):106-111.
[4]Jia Y F,Xu L Y,Wang X,et al.Infrared spectroscopic and X-ray diffraction characterization of the nature of adsorbed arsenate on ferrihydrite[J].Geochimica et Cosmochimica Acta,2007,71(7):1643-1654.
[5]Smith E,Naidu R,Alston A M.Chemistry of Arsenic in Soils:I.Sorption of Arsenate and Arsenite by Four Australian Soils[J].Journal of Environment Quality,1999,28(6):1719-1726.
[6]Liu F,Cristofaro A D,Violante A.Effect of pH,phosphate and oxalate on the adsorption/desorption of arsenate on/from goethite[J].Soil Science,2001,166(3):197-208.
[7]李梦莹,刘云根,侯磊,等.阳宗海湖滨湿地环境因素对沉积物砷赋存形态的影响及浓度水平预测[J].环境科学研究,2018,31(9):1554-1563.
[8]闻国静,王妍,刘云根,等.阳宗海南岸流域农村及农业面源对水体磷污染的贡献[J].西南林业大学学报(自然科学),2017,37(1):123-129.
[9]Ruban V,López-Sánchez J F,Pardo P,et al.Development of a harmonised phosphorus extraction procedure and certification of a sediment reference material[J].Journal of Environmental Monitoring,2001,3(1):121-125.
[10]蔡艳洁,张恩楼,刘恩峰,等.云南阳宗海沉积物重金属污染时空特征及潜在生态风险[J].湖泊科学,2017,29(5):1121-1133.
[11]Rauret G,Rubio R,López-Sánchez J F.Optimization of tessier procedure for metal solid speciation in river sediments[J].International Journal of Environmental Analytical Chemistry,1989,36(2):69-83.
[12]金赞芳,陈英旭,柯强.运河和西湖沉积物砷的吸附及形态分析[J].浙江大学学报(农业与生命科学版),2001,27(6):652-656.
[13]缪鑫,李兆君,龙健,等.不同类型土壤对汞和砷的吸附解吸特征研究[J].核农学报,2012,26(3):552-557.
[14]李世玉,刘彬,杨常亮,等.上覆水pH值和总磷浓度对含铁盐的高砷沉积物中砷迁移转化的影响[J].湖泊科学,2015,27(6):1101-1106.
[15]张慧娟,刘云根,侯磊,等.典型出境河流生态修复区沉积物重金属污染特征及生态风险评估[J].环境科学研究,2017,30(9):1415-1424.
[16]李功振,许爱芹.京杭大运河(徐州段)砷的形态的分步特征研究[J].环境科学与技术,2008,31(1):69-71.
[17]Bhattacharya P,Welch A H,Stollenwerk K G,et al.Arsenic in the environment:Biology and Chemistry[J].Science of the Total Environment,2007,379(2-3):109-120.
[18]李雪,王颖,张笛.河口沉积物对砷的吸附性能及影响因素[J].环境科学与技术,2012,34(12):1-6.
[19]Rose T J,Hardiputra B,Rengel Z.Wheat,canola and grain legume access to soil phosphorus fractions differs in soils with contrasting phosphorus dynamics[J].Plant and Soil,2010,326(1-2):159-170.
[20]杨文澜,蒋功成,王兆群,等.洪泽湖不同湖区表层沉积物中磷的形态和分布特征[J].地球与环境,2013,41(1):43-49.
[21]高丽,杨浩,周健民,等.滇池沉积物磷的释放以及不同形态磷的贡献[J].农业环境科学学报,2004,23(4):731-734.
[22]王颖,沈珍瑶,呼丽娟,等.三峡水库主要支流沉积物的磷吸附/释放特性[J].环境科学学报,2008,28(8):1654-1661.
[23]吴萍萍.不同类型矿物和土壤对砷的吸附:解吸研究[D].北京:中国农业科学院,2011.
[24]Ahmed Z U,Panaullah G M,Gauch H,et al.Genotype and environment effects on rice(Oryza sativa L.)grain arsenic concentration in Bangladesh[J].Plant and Soil,2011,338(1-2):367-382.
[25]石荣,贾永锋,王承智.土壤矿物质吸附砷的研究进展[J].土壤通报,2007,38(3):584-589.