莠去津在吉林省不同土壤类型中的解吸特征
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摘要
为了探究莠去津污染土壤中莠去津的解吸特性,通过批量平衡法,研究了莠去津在白浆土、黑土、盐碱土上的解吸特征及影响因子。结果表明:3种土壤类型中莠去津的解吸过程经历了快速解吸、慢速解吸、最终达到解吸平衡3个阶段,平衡时间为720min;采用准二级动力学方程拟合效果最好。Freundlich方程可以较好地描述莠去津在3种土壤中的解吸等温曲线(R~2>0.969)。ΔG<0,ΔH>0,ΔS>0说明其解吸为自发吸热且无序的过程。莠去津在盐碱土中的解吸率最高,其次为黑土,白浆土解吸率最低。土壤pH升高或添加生物炭均能够降低莠去津在土壤中的解吸。
To investigate the desorption characteristics of atrazine in different soils contaminated by atrazine,the desorption behavior and its affecting factors were studied by batch balance method in albic soil,black soil,and saline soil.The results showed that the process of atrazine desorption in the three soils experienced three stages:rapid desorption,slow desorption and finally desorption equilibrium,and the equilibrium time was 12 h.Freundlich equation could better describe the desorption isotherm curve of atrazine in three soils(R2>0.969).ΔG<0,ΔH>0,ΔS>0.This indicated that desorption was a spontaneous and disordered process of heat absorption.Atrazine had the highest desorption rate in saline soil,followed by black soil and albic soil.Increasing the pH value of soil or adding biochar could reduce the desorption capacity of atrazine in soil.
To investigate the desorption characteristics of atrazine in different soils contaminated by atrazine,the desorption behavior and its affecting factors were studied by batch balance method in albic soil,black soil,and saline soil.The results showed that the process of atrazine desorption in the three soils experienced three stages:rapid desorption,slow desorption and finally desorption equilibrium,and the equilibrium time was 12 h.Freundlich equation could better describe the desorption isotherm curve of atrazine in three soils(R2>0.969).ΔG<0,ΔH>0,ΔS>0.This indicated that desorption was a spontaneous and disordered process of heat absorption.Atrazine had the highest desorption rate in saline soil,followed by black soil and albic soil.Increasing the pH value of soil or adding biochar could reduce the desorption capacity of atrazine in soil.
引文
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[2]刘超,邢茂德,边文波.鲁中地区玉米田除草剂筛选试验研究[J].农业科技通讯,2017(5):67-70.
[3]张承,龙友华,吴小毛.敌草胺在土壤中的吸附及其与持久性和生物有效性之间的关系[J].农药学学报,2016,18(5):633-643.
[4]瞿梦洁,李慧冬,刘伟,等.水土环境介质中阿特拉津修复过程研究进展[J].生态毒理学报,2017,12(4):119-128.
[5]边炜涛,马秀兰,王富民,等.环丙沙星在盐碱土中吸附特性的研究[J].农业环境科学学报,2016,35(10):1953-1959.
[6]Huang Y F,Liu Z Z,He Y,et al.Quantifying effects of primary parameters on adsorption-desorption of atrazine in soils[J].JournalofSoilsandSediments,2013,13(1):82-93.
[7]龚香宜,何炎志,孙云雷.有机氯农药在农田土壤中的吸附解吸特征[J].环境科学与技术,2014,37(12):16-19.
[8]张燕飞,蔡磊明,赵华,等.乙草胺在3种土壤中的吸附和解吸附特性[J].农药,2015,54(2):98-102.
[9]黄丽,杨华,孙康,等.活性炭对丁酮的吸附动力学研究[J].生物质化学工程,2017,51(5):29-35.
[10]石健,邹开云,丁建东.阿特拉津在土壤中的解吸行为研究[J].安徽农业科学,2010,38(12):6441-6443.
[11]姜蕾,贾林贤,林靖凌,等.土壤有机质、pH值和表面活性剂对杀菌剂戊菌唑在土壤中吸附与解吸行为的影响[J].农药,2015,54(12):906-910.
[12]黄玉芬,刘忠珍,李衍亮,等.土壤矿物和胡敏酸对阿特拉津的吸附-解吸作用研究[J].土壤学报,2016,53(1):155-165.
[13]徐志英,任莉,陈小军,等.鱼藤酮在3种土壤中的吸附-解吸附特性[J].农药学学报,2018,20(1):110-117.
[14]王金贵,吕家珑,曹莹菲.镉和铅在2种典型土壤中的吸附及其与温度的关系[J].水土保持学报,2011,25(6):254-259.
[15]汪玉,司友斌.纳米粘土矿物对阿特拉津的吸附-解吸特性研究[J].农业环境科学学报,2009,28(1):125-129.
[16]陈成,刘廷凤,孙成.土壤中铜与阿特拉津交互作用下的吸附行为研究[J].农业环境科学学报,2016,35(7):1294-1299.
[17]王玉军,李文朋,张铎,等.阿特拉津在土柱中的淋溶规律研究[J].水土保持学报,2011,25(3):254-256.
[18]Huang Y F,Liu Z Z,He Y,et al.Impact of soil primary size fractions on sorption and desorption of atrazine on organo-mineral fractions[J].Environmental Science and Pollution Research,2015,22(6):4396-4405.
[19]吴蒨蒨.生物炭增强土壤吸附阿特拉津的作用及机理[D].杭州:浙江大学,2016.
[20]李玉梅,王根林,刘征宇,等.生物炭对土壤中莠去津残留消减的影响[J].作物杂志,2014(2):137-141.