秸秆和硫酸铝改良剂对苏打盐碱土吸附腐殖酸性能的影响
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摘要
为了揭示硫酸铝改良剂对苏打盐碱土在秸秆还田条件下固碳性能的影响,研究了添加秸秆和硫酸铝并于恒温条件下培养300天后的盐碱土对腐殖酸的吸附性能。结果表明:在腐殖酸吸附动力学中,秸秆和硫酸铝不同添加量条件下,盐碱土对腐殖酸的吸附均在120min时达到平衡,准二级动力学方程拟合效果最好,R2值最高(0.936)。Langmuir方程和Freundlich方程均可较好地拟合盐碱土对腐殖酸的等温吸附。添加相同比例的玉米秸秆条件下,Langmuir方程拟合获得的最大吸附量分别表现为69.335,42.830,40.498,42.593mg/g。而添加同等比例的硫酸铝改良剂条件下,最大吸附量分别表现为21.358,32.647,69.335,49.232,62.375,42.830mg/g。
Aluminum sulfate improver has a good effect on reducing the pH of soda saline and alkaline soil and promoting soil colloidal condensation and organic carbon accumulation.In order to reveal the effect of aluminum sulfate improver on the carbon sequestration performance of soda saline-alkali soil under straw returning conditions,the adsorption performance of saline-alkaline soil on humic acid was studied after adding straw and aluminum sulfate and culturing for 300 days under constant temperature conditions.The results showed that in the adsorption kinetics of humic acid,under the different addition conditions of straw and aluminum sulfate,the adsorption of humic acid by saline-alkali soil reached the equilibrium of the quasisecond-order kinetic equation at 120 min,R2.The highest value(0.936).Both the Langmuir equation and the Freundlich equation can better fit the isothermal adsorption of humic acid by saline-alkaline soil.Under the condition of adding the same proportion of corn stover,the maximum adsorption amount obtained by the Langmuir equation was 69.335,42.830,40.498 and 42.593 mg/g,respectively.Under the condition of adding the same proportion of aluminum sulfate improver,the maximum adsorption amounts were 21.358,32.647,69.335,49.232,62.375 and 42.830 mg/g,respectively.
Aluminum sulfate improver has a good effect on reducing the pH of soda saline and alkaline soil and promoting soil colloidal condensation and organic carbon accumulation.In order to reveal the effect of aluminum sulfate improver on the carbon sequestration performance of soda saline-alkali soil under straw returning conditions,the adsorption performance of saline-alkaline soil on humic acid was studied after adding straw and aluminum sulfate and culturing for 300 days under constant temperature conditions.The results showed that in the adsorption kinetics of humic acid,under the different addition conditions of straw and aluminum sulfate,the adsorption of humic acid by saline-alkali soil reached the equilibrium of the quasisecond-order kinetic equation at 120 min,R2.The highest value(0.936).Both the Langmuir equation and the Freundlich equation can better fit the isothermal adsorption of humic acid by saline-alkaline soil.Under the condition of adding the same proportion of corn stover,the maximum adsorption amount obtained by the Langmuir equation was 69.335,42.830,40.498 and 42.593 mg/g,respectively.Under the condition of adding the same proportion of aluminum sulfate improver,the maximum adsorption amounts were 21.358,32.647,69.335,49.232,62.375 and 42.830 mg/g,respectively.
引文
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[2]徐子棋,许晓鸿.松嫩平原苏打盐碱地成因、特点及治理措施研究进展[J].中国水土保持,2018(2):54-59.
[3]Al-KarakiGhazi N,Al-Omoush M.Wheat response to phosphogypsum and mycorrhizal fungi in alkaline soil[J].Journal of Plant Nutrition,2002,25(4):873-883.
[4]殷厚民,胡建,王青青,等.松嫩平原西部盐碱土旱作改良研究进展与展望[J].土壤通报,2017,48(1):236-242.
[5]Wang S J,Chen Q,Li Y,et al.Research on saline-alkali soil amelioration with FGD gypsum[J].Resources,Conservation and Recling,2017,121(6):82-92.
[6]张聪,慕平,尚建明.长期持续秸秆还田对土壤理化特性、酶活性和产量性状的影响[J].水土保持研究,2018,25(1):92-98.
[7]Eldor A P.The nature and dynamics of soil organic matter:Plant inputs,microbial transformations,and organic matter stabilization[J].Soil Biology and Biochemistry,2016,98:109-126.
[8]代文才,高明,兰木羚,等.不同作物秸秆在旱地和水田中的腐解特性及养分释放规律[J].中国生态农业学报,2017,25(2):188-199.
[9]Cristian U,Maria P S,Mauricio E,et al.Surfactant properties of humic acids extracted from volcanic soils and their applicability in mineral flotation processs[J].Journal of Environmental Mangement,2018,227(12):117-123.
[10]李月芬,杨有德,赵兰坡,等.不同硫酸铝用量对苏打盐渍土磷素形态及吸附特性的影响[J].水土保持学报,2008,39(5):1120-1125.
[11]王宇,韩兴,赵兰坡.硫酸铝对苏打盐碱土的改良作用研究[J].水土保持学报,2006,20(4):50-53.
[12]赵兰坡.施用作物秸秆对土壤培肥作用[J].土壤通报,1996,27(2):76-78.
[13]Gizachew T G,Thomas K,Lars J M,et al.Shortterm effects of loosening and incorporation of straw slurry into the upper subsoil on soil physical properties and crop yield[J].Soil and Tilage Research,2018,184(12):62-67.
[14]朱孟龙,赵兰坡,赵兴敏,等.稻草和硫酸铝添加对苏打盐碱土活性有机碳及有机无机复合体的影响[J].水土保持学报,2015,29(4):284-288.
[15]胡宁.蒙脱石-羟基铝复合物对腐殖酸的吸附特征研究[D].长春:吉林农业大学,2014.
[16]Davidson E A,Verchot L V,Cattanio J H,et al.Effect of soil water content on soil respiration in forests and cattle pastures of eastern A-mazonia[J].Biogeochemistry,2000,48:53-69.
[17]陈全胜,李凌浩,韩兴国,等.水分对土壤呼吸的影响及机理[J].生态学报,2003,23(5):972-978.
[18]吴景贵,王明辉,万忠梅,等.玉米秸秆腐解过程中形成胡敏酸的组成和结构研究[J].土壤学报,2006,43(3):443-451.
[19]张夫道,Fokin A D.作物秸秆碳在土壤中分解和转化规律的研究[J].植物营养与肥料学报,1994(1):27-38.
[20]Feng X,Simpson A J,Simpson M J.Chemical and mineralogical controls on humic acid sorption to clay mineral surfaces[J].Organic Geochemistry,2005,36:1553-1566.
[21]康露,吴景贵,张晋京,等.土壤及土壤矿物对类胡敏酸的吸附解吸及其影响因素研究[J].环境科学学报,2013,33(5):1332-1340.
[22]Arnarson T S,Keli R G.Meehanisms of pore water organic matter adsorption to montmorillonite[J].Marine Chemistry,2007,7:309-320.
[23]朱孟龙.稻草及硫酸铝添加对苏打盐碱土有机质含量及其组成的影响[D].长春:吉林农业大学,2015.
[24]Limousin G,Gaudet J P,Charlet L,et al.Sorption isotherms:A review on physical bases,modeling and measurement[J].Applied Geoehemistry,2007,22(2):249-275.
[25]邵云,陈静雯,王温澎,等.四种有机物料对Pb2+的吸附特性[J].农业环境科学学报,2017,36(9):1858-1867.
[26]Febrianto J,Kosasih A N,Sunarso J,et al.Equilibrium and kinetic studies in adsorption of heavy metals using biosorbent:A summary of recent studies[J].Journal of Hazardous Materials,2009,162(2):616-645.
[27]Nguyen C,Do D D.The Dbinin-radushkevich equation and the underling microscopic adsorption description[J].Carbon,2001,39(9):1327-1336.
[28]Chen H,Dai G,Zhao J,et al.Removal of copper(II)ions by a biosorbent:Cinnamomum camphora leaves powder[J].Journal of Hazardous Material,2010,177(1/3):228-236.
[29]朱健,吴庆定,王平,等.经典等温吸附模型在重金属离子/硅藻土体系中的应用及存在问题[J].环境科学,2013,34(11):4341-4348.