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| 1 | Quantifying hysteresis of atrazine desorption from a sandy loam soil显示文摘Batch experiments were carried out to investigate the effects of initial atrazine concentrations and consecutive desorption steps on the desorption characteristics of atrazine from a sandy loam soil.As initial atrazine concentration increased,the average percentage of atrazine desorption on the sandy loam soil ranged gradually from 23.1% to 38.5% after five consecutive desorption steps.The values of the Freundlich capacity parameter,kdes,derived from the initial concentration and time-dependent desorption isotherm were consistently higher than those associated with sorption.The opposite trend was observed only for the values of nonlinear parameter,ndes,from the initial concentration-dependent desorption isotherms.Atrazine hydrolysis to hydroxyatrazine and bound residue formation were mainly responsible for the observed hysteresis in its sorption and desorption isotherms.For the initial concentration-dependent desorption isotherms,as initial atrazine concentration increased,the values of hysteretic coefficients ω and λ decreased,and H values increased.However,the relationships between initial atrazine concentration and hysteretic coefficients were not pronounced for ω,H,or λ.For the time-dependent desorption isotherms,λ and H values increased as the atrazine desorption step proceeded.The correlation between hysteretic coefficient and desorption step was highly significant for λ (P < 0.0001),but not for H. | Jiancai Deng Xin Jiang Weiping Hu Liuming Hu | 2010 | Journal of Environmental Sciences2010，22，12： | 4 |
| 2 | 多氯联苯同系物在水稻土中的吸附行为比较显示文摘土壤是事关农产品生产环境质量安全的重要环境介质,同时因持久性有毒污染物多氯联苯(polychlorinated biphenyls,PCBs)在世界范围内普遍检出而备受科学界与政府关注。 | 周蔚凤 蒋丽娜 张建英 | 2012 | 土壤学报2012，49，1： | 2 |
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