Leaching kinetics of water soluble organic carbon (WSOC) from upland soil

被引：18

作者：

Cao, J ^{[1
]}

Tao, S ^{[1
]}

Li, BG ^{[1
]}

机构：

[1] Peking Univ, Dept Urban & Environm Sci, Beijing 100871, Peoples R China

来源：

CHEMOSPHERE | 1999年 / 39卷 / 11期

关键词：

soil; water soluble organic carbon (WSOC); leaching; degradation kinetics;

D O I：

10.1016/S0045-6535(99)00071-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The kinetics of the leaching process of Water Soluble Organic Carbon (WSOC) from an upland soil Mare studied in a column leaching experiment. The pattern of the leaching curve indicated multiphasic release kinetics. A conceptual model was proposed to divide capillary and gravitational pores. The translocation of organic carbon in soil during leaching occurs in four sequential steps. 1) degradation of insoluble organic carbon to form WSOC; 2) desorption into capillary pore water, 3) diffusion towards gravitation pore water: and 4) leaching by convection flow. The overall kinetics of the leaching process can be depicted using an equation with three additive terms for degradation, desorption/diffusion. and convection, respectively. (C) 1999 Elsevier Science Ltd, All rights reserved.

引用

页码：1771 / 1780

页数：10

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