| 土壤硼的电化学特征及解吸动力学 |
| |
| 作者姓名： | ZHU Duan-Wei CHEN Xiu-Hong CHENG Dong-Sheng GENG Ming-Jian LIU Wu-Ding |
| |
| 作者单位： | [1]CollegeofGeosicence,ZhongshanUniversity,Guangzhou510275,China [2]CollegeofResourceandEnvironment,SouthwestAgriculturalUniversity,Chongqing400716,China |
| |
| 基金项目： | *1Project (No. 39670425) supported by the National Natural Science Foundation of China. |
| |
| 摘 要： | Effects of humus fractions (fulvic acid,brown humic acid and grey humic acid) on the leachability and transferring activity of five types of mineral-bound Hg were investigated.Under the acid leaching condition;fulvic acid could promote leachability and vertical transference of all the mineral-bound Hg.Brown humicacid could retard the leaching and trasferring processes of CaCO30-Hg,Fe2O3-Hg,MnO2-Hg and kaolinite Hg but not bentonite-Hg.Grey humic acid could greatly enhance residing ability of the mineral-bound Hg in the soil colum and restrain them from vertical transferring.The effect of humus on leachability and transferring activity on the mineral-bound Hg was closely related to its ability to convert the mineral-bound Hg into orgainc-bound form and the transferbility of the latter in the soil column.The characteristics of the mineral-bound Hg in speciation were the internal factors that determined the extent and rate of the influence of the humus.
|
| 关 键 词： | 腐殖质 可淋溶性 矿物汞 运移规律 活动性 淋溶作用 |
Electrical characteristics and desorption kinetics of soil boron |
| |
| ZHU Duan-Wei,CHEN Xiu-Hong,CHENG Dong-Sheng,GENG Ming-Jian,LIU Wu-Ding.Electrical characteristics and desorption kinetics of soil boron[J].Pedosphere,2000,10(1):61-68. |
| |
| Authors: | ZHU Duan-Wei CHEN Xiu-Hong CHENG Dong-Sheng GENG Ming-Jian and LIU Wu-Ding |
| |
| Institution: | [1]CollegeofGeosicence,ZhongshanUniversity,Guangzhou510275,China [2]CollegeofResourceandEnvironment,SouthwestAgriculturalUniversity,Chongqing400716,China |
| |
| Abstract: | Effects of humus fractions (fulvic acid,brown humic acid and grey humic acid) on the leachability and transferring activity of five types of mineral-bound Hg were investigated.Under the acid leaching condition;fulvic acid could promote leachability and vertical transference of all the mineral-bound Hg.Brown humicacid could retard the leaching and trasferring processes of CaCO30-Hg,Fe2O3-Hg,MnO2-Hg and kaolinite Hg but not bentonite-Hg.Grey humic acid could greatly enhance residing ability of the mineral-bound Hg in the soil colum and restrain them from vertical transferring.The effect of humus on leachability and transferring activity on the mineral-bound Hg was closely related to its ability to convert the mineral-bound Hg into orgainc-bound form and the transferbility of the latter in the soil column.The characteristics of the mineral-bound Hg in speciation were the internal factors that determined the extent and rate of the influence of the humus. |
| |
| Keywords: | boron desorption kinetics electro-ultrafiltration soil |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《土壤圈》浏览原始摘要信息 |
| 点击此处可从《土壤圈》下载免费的PDF全文 |
