Effect of Humus on Activity of Mineral-Bound Hg: III.Effect on Leachability and Transfer of Mineral-Bound Hg Under Acid Leaching Condition

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Effect of Humus on Activity of Mineral-Bound Hg: III.Effect on Leachability and Transfer of Mineral-Bound Hg Under Acid Leaching Condition

机译：腐殖质对矿质汞的活性的影响：Ⅲ。酸浸条件下对矿质汞溶出性和迁移的影响

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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 humic acid could retard the leaching and transferring processes of CaCO3-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 column 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 organic-bound form and the transferability 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.

机译：研究了腐殖质组分（黄腐酸，棕腐殖酸和灰腐殖酸）对五种与矿物结合的汞的浸出能力和转移活性的影响。在酸浸条件下;黄腐酸可以促进所有与矿物结合的汞的浸出性和垂直迁移。棕色腐殖酸可以延缓CaCO3-Hg，Fe2O3-Hg，MnO2-Hg和高岭石Hg的浸出和转移过程，但不能抑制膨润土-Hg的浸出和转移过程。灰色腐殖酸可以极大地增强矿物结合的汞在土壤柱中的滞留能力，并抑制其垂直迁移。腐殖质对与矿物结合的Hg的浸出性和转移活性的影响与其与矿物结合的Hg转化为有机结合形式的能力以及后者在土壤柱中的转移能力密切相关。物种中与矿物结合的汞的特征是决定腐殖质影响程度和速率的内部因素。

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《土壤圈（英文版）》 |2000年第1期|53-60|共8页
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College of Geoscience, Zhongshan University, Guangzhou 510275 (China);

College of Resource and Environment, Southwest Agricultural University, Chongqing 400716 (China);

College of Resource and Environment, Southwest Agricultural University, Chongqing 400716 (China);

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
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humus; leachability; mineral-bound Hg; transfer;

机译：腐殖质;浸出性;矿质汞;迁移;

Effect of Humus on Activity of Mineral-Bound Hg: III.Effect on Leachability and Transfer of Mineral-Bound Hg Under Acid Leaching Condition

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