| 连作杨树人工林根际土壤中2种酚酸的吸附与解吸行为 |
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| 引用本文： | 王延平,杨阳,王华田,姜岳忠,王宗芹.连作杨树人工林根际土壤中2种酚酸的吸附与解吸行为[J].林业科学,2010,46(1). |
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| 作者姓名： | 王延平 杨阳 王华田 姜岳忠 王宗芹 |
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| 作者单位： | 1. 山东农业大学农业生态与环境重点实验室,山东农业大学林学院,泰安,271018
2. 山东省林业科学研究院,济南,251000 |
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| 基金项目： | 教育部博士点专项科研基金(2006434010);;中国公益性行业科研专项(200704032);;山东省自然科学基金(Y2007D30,Q2008D06) |
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| 摘 要： | 采集不同代人工林林地杨树根际土壤样品,采用等温吸附和解吸试验结合HPLC定量测定,研究杨树根际土壤中2种主要酚酸(对羟基苯甲酸和苯甲酸)的吸附和解吸附特性,探讨2种酚酸在杨树根际土壤中的累积机制。结果表明:杨树根际土壤对对羟基苯甲酸和苯甲酸均具有较强的吸附能力,对羟基苯甲酸的平均吸附率63.39%～72.26%,苯甲酸的吸附率较对羟基苯甲酸低,平均吸附率39.53%～47.46%;Fruendlich等温吸附方程能很好地描述这2种酚酸在杨树根际土壤中的吸附过程,吸附平衡浓度Ce和吸附量Cs之间存在较好的线性关系。2种酚酸的吸附作用属于物理吸附,但解吸特性差异较大,对羟基苯甲酸在不同连作代数林地根际土壤吸附平衡液中的解吸能力均较强,平均解吸率46.62%～52.89%;而苯甲酸解吸能力较弱,尤其在高浓度吸附平衡体系中很难进行解吸附,此规律与2种酚酸的吸附常数基本吻合。2种酚酸的吸附和解吸特性一定程度上反映酚酸在杨树根际土壤中的环境行为学特征,并为进一步揭示其在杨树根际微域的累积机制提供理论依据。
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| 关 键 词： | 杨树根际 对羟基苯甲酸 苯甲酸 吸附和解吸 环境行为 累积机制 |
Sorption-Desorption of Two Phenolic Acids in Poplar Rhizosphere Soil in Continuous Cropping Plantation |
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| Wang Yanping,Yang Yang,Wang Huatian,Jiang Yuezhong,Wang Zongqin.Sorption-Desorption of Two Phenolic Acids in Poplar Rhizosphere Soil in Continuous Cropping Plantation[J].Scientia Silvae Sinicae,2010,46(1). |
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| Authors: | Wang Yanping Yang Yang Wang Huatian Jiang Yuezhong Wang Zongqin |
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| Institution: | 1.Agro-Ecoenvironmental Laboratory of Shandong Agricultural University Forestry College of Shandong Agricultural University Tai'an 71018/a>;2.Shandong Academy of Forestry Jinan 251000 |
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| Abstract: | Sorption and desorption characteristics of two phenolic acids,p-hydroxybenzoic acid and benzoic acid,in the rhizosphere soil of continuous cropping poplar plantations were investigated in order to find accumulation mechanism of the phenolic acids.An isotherms adsorption and desorption method and HPLC test were used.The results showed that rhizosphere soil of poplar plantation had strong adsorptive capacity to p-hydroxybenzoic acid and benzoic acid.The average adsorption rate of benzoic acid in the rhizosphe... |
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| Keywords: | poplar rhizosphere p-hydroxybenzoic acid benzoic acid sorption and desorption environmental behavior accumulation mechanism |
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