砷污染高原湖滨湿地沉积物对磷酸盐的吸附能力及影响因素探究
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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,以阳宗海农田土壤为对照,通过室内模拟实验,研究不同砷污染程度的沉积物对磷酸盐吸附的差异及影响因素。结果表明:(1)低浓度磷酸盐时吸附能力为底层沉积物>表层沉积物>农田土壤;高浓度磷酸盐时吸附能力为表层沉积物>底层沉积物>农田土壤;主要与沉积物表面的吸附点位的分布差异有关。(2)砷污染沉积物中活性态砷的含量及水体pH是影响沉积物富集磷的重要因素。(3)可还原态砷、水体pH、弱酸提取态砷对磷酸盐的吸附有重要贡献。
Sediments in Yangzonghai lakeside wetland was selected as the research object,farmland soil around the lake bank was chosen for comparison.The sorption differences of phosphate on different pollution degree of arsenic contaminated sediments and the related impact factors were studied through indoor simulation experiment.The results showed that:(1)the sorption sequence was DC(bottom layer sediment)>BC(surface layer sediment)>NT(farmland soil)under the low initial phosphate concentrations,whereas it changed into BC>DC>NT under the high initial concentrations.The main influencing factors lay on the distribution differences of sorption sites of sediments.(2)The activity of arsenic and pH of water body had important effects on the sediment accumulation ability of phosphate.(3)Among these factors,weak acid extraction and reducible arsenic in sediment and the water body pH made significant contributions to the sorption of phosphate.
Sediments in Yangzonghai lakeside wetland was selected as the research object,farmland soil around the lake bank was chosen for comparison.The sorption differences of phosphate on different pollution degree of arsenic contaminated sediments and the related impact factors were studied through indoor simulation experiment.The results showed that:(1)the sorption sequence was DC(bottom layer sediment)>BC(surface layer sediment)>NT(farmland soil)under the low initial phosphate concentrations,whereas it changed into BC>DC>NT under the high initial concentrations.The main influencing factors lay on the distribution differences of sorption sites of sediments.(2)The activity of arsenic and pH of water body had important effects on the sediment accumulation ability of phosphate.(3)Among these factors,weak acid extraction and reducible arsenic in sediment and the water body pH made significant contributions to the sorption of phosphate.
引文
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[25]ALENEZI E,BOCKELMANNEVANS B N,FALCONER R A,et al.Phosphorus adsorption/desorption processes of estuarine sediment:a case study-Loughor Estuary,UK[J].Arabian Journal of Geosciences,2016,9(3):200-209.
[26]HUANG L,FANG H,HE G,et al.Phosphorus adsorption on natural sediments with different pH incorporating surface morphology characterization[J].Environmental Science and Pollution Research,2016,23(18):18883-18891.
[27]徐轶群,熊慧欣,赵秀兰.底泥磷的吸附与释放研究进展[J].重庆环境科学,2003,25(11):147-149.
[28]张潆元,黑鹏飞,杨静,等.本底吸附物对长江沉积物磷吸附容量的影响[J].环境科学研究,2017,30(4):545-551.
[29]APPAN A,WANG H.Sorption isotherms and kinetics of sediment phosphorus in a tropical reservoir[J].Journal of Environmental Engineering,2000,126(11):993-998.
[30]RUBINOS D A,IGLESIAS L,DIAZFIERROS F,et al.Interacting effect of pH,phosphate and time on the release of arsenic from polluted river sediments(Anllóns River,Spain)[J].Aquatic Geochemistry,2011,17(3):281-306.
[31]郑景华,苏华美,范荣桂,等.煤矸石土壤砷污染相关性分析[J].水土保持通报,2014,34(2):168-171.
[2]朱季文,季子修,蒋自龚.太湖湖滨带的生态建设[J].湖泊科学,2002,14(1):77-82.
[3]CHEN C W,KAO C M,CHEN C F,et al.Distribution and accumulation of heavy metals in the sediments of Kaohsiung Harbor,Taiwan[J].Chemosphere,2007,66(8):1431-1440.
[4]LURLING M,MACKAY E B,REITZEL K,et al.Editorial-a critical perspective on geo-engineering for eutrophication management in lakes[J].Water Research,2016,97(1):1-10.
[5]金晓丹,吴昊,陈志明,等.长江河口水库沉积物磷形态、吸附和释放特性[J].环境科学,2015,36(2):448-456.
[6]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].环境科学研究,2004,26(3):38-43.
[7]姜霞,王秋娟,王书航,等.太湖沉积物氮磷吸附/解析特征分析[J].环境科学,2011,32(5):1285-1291.
[8]WANG Y,SHEN Z,NIU J,et al.Adsorption of phosphorus on sediments from the Three-Gorges Reservoir(China)and the relation with sediment compositions[J].Journal of Hazardous Materials,2009,162(1):92-98.
[9]JIN X,WANG S,YAN P,et al.The adsorption of phosphate on different trophic lake sediments[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2005,254(1):241-248.
[10]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.
[11]胡智龚,孙红文,谭媛.湖泊沉积物对N和P的吸附特性及影响因素研究[J].农业环境科学学报,2004,23(6):1212-1216.
[12]杨长明,荆亚超,沈烁,等.微孔曝气与覆盖对城市重污染河道底泥磷形态分布及释放过程的影响[J].环境化学,2015,34(6):1150-1157.
[13]RUBAN V,LOPEZSANCHEZ 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.
[14]RAURET G,RUBIO R,LOPEZSANCHEZ J F,et al.Optimization of tessier procedure for metal solid speciation in river sediments[J].International Journal of Environmental Analytical Chemistry,2006,36(2):69-83.
[15]PLAZINSKI W,RUDZINSKI W,PLAZINSKA A,et al.Theoretical models of sorption kinetics including a surface reaction mechanism:a review[J].Advances in Colloid and Interface Science,2009,152(1):2-13.
[16]PETTICREW E L,AROCENA J M.Evaluation of iron-phosphate as a source of internal lake phosphorus loadings[J].Science of the Total Environment,2001,266(1):87-93.
[17]王淑莹,贾永锋,王少锋,等.锦州湾及附近河口沉积物中砷含量分布及形态[J].生态学杂志,2009,28(5):895-900.
[18]李智圆,杨常亮,李世玉,等.砷污染治理后阳宗海沉积物砷的分布与稳定[J].环境科学与技术,2015,38(2):41-47.
[19]刘晓端,徐清,葛晓立,等.密云水库沉积物中金属元素形态分析研究[J].中国科学:D辑地球科学,2005,35(增刊1):288-295.
[20]余秀娟,霍守亮,昝逢宇,等.巢湖表层沉积物中砷的分布特征及其污染评价[J].环境工程技术学报,2012,2(2):124-132.
[21]TEASDALE P R,APTE S C,FORD P W,et al.Geochemical cycling and speciation of copper in waters and sediments of Macquarie Harbour,Western Tasmania[J].Estuarine Coastal and Shelf Science,2003,57(3):475-487.
[22]张岩,崔丽娟,赵欣胜,等.湿地沉积物对磷的吸附-解吸动力学模型概述[J].生态学杂志,2011,30(10).
[23]SHAPIRO R E,FRIED M.Relative release and retentiveness of soil phosphates[J].Soil Science Society of America Journal,1959,23(3):195-198.
[24]HOROWITZ A J,ELRICKK A.The relation of stream sediment surface area,grain size and composition to trace element chemistry[J].Applied Geochemistry,1987,2(4):437-451.
[25]ALENEZI E,BOCKELMANNEVANS B N,FALCONER R A,et al.Phosphorus adsorption/desorption processes of estuarine sediment:a case study-Loughor Estuary,UK[J].Arabian Journal of Geosciences,2016,9(3):200-209.
[26]HUANG L,FANG H,HE G,et al.Phosphorus adsorption on natural sediments with different pH incorporating surface morphology characterization[J].Environmental Science and Pollution Research,2016,23(18):18883-18891.
[27]徐轶群,熊慧欣,赵秀兰.底泥磷的吸附与释放研究进展[J].重庆环境科学,2003,25(11):147-149.
[28]张潆元,黑鹏飞,杨静,等.本底吸附物对长江沉积物磷吸附容量的影响[J].环境科学研究,2017,30(4):545-551.
[29]APPAN A,WANG H.Sorption isotherms and kinetics of sediment phosphorus in a tropical reservoir[J].Journal of Environmental Engineering,2000,126(11):993-998.
[30]RUBINOS D A,IGLESIAS L,DIAZFIERROS F,et al.Interacting effect of pH,phosphate and time on the release of arsenic from polluted river sediments(Anllóns River,Spain)[J].Aquatic Geochemistry,2011,17(3):281-306.
[31]郑景华,苏华美,范荣桂,等.煤矸石土壤砷污染相关性分析[J].水土保持通报,2014,34(2):168-171.