skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simultaneous assessment of deposition effects of base cations, sulfur, and nitrogen using an extended critical load function for acidification

Abstract

Base cations (BC) play an important role to prevent soil acidification. In certain acid sensitive areas, such as China, BC deposition is high and a considerable fraction is of anthropogenic origin. BC deposition might decrease in the future with the implementation of air pollution control measures. The effect of changes in BC deposition, however, has seldom been considered in critical load calculations based on the steady-state mass balance (SSMB) method. In order to better quantify the importance of the BC deposition for acid deposition mitigation policy, an extension of the SSMB method for critical load calculation for soil acidification is presented. The BC deposition is taken into account as a variable along with sulfur (S) and nitrogen (N) deposition, creating an S-N-BC critical load function. As a case study, critical loads of S and N for the Tie Shan Ping catchment in Chongqing in southwest China under variable BC deposition were calculated. Results indicate that abatement of BC deposition has significant impact on the critical loads of S and N. A 75% reduction in BC of assumed anthropogenic origin decreases the critical loads of acids by 58%. The current deposition does not exceed the critical loads, but if BC depositionmore » from anthropogenic sources was controlled, then the exceedance would be considerable. Uncertainty analysis show that the size of the BC deposition of natural origin is the single parameter contributing the most to the steady-state S and N critical load. The extended critical load function can be used by policy makers to set more reasonable acidity control strategies in the future. The method also highlights for policymakers the 'competition' between emission control of particulate matter driven by human health targets and potential increase of net acid load from such measures. 38 refs., 4 figs., 1 tab.« less

Authors:
; ; ; ;  [1]
  1. Tsinghua University, Beijing (China). Department of Environmental Science and Engineering
Publication Date:
OSTI Identifier:
20885831
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Science and Technology; Journal Volume: 41; Journal Issue: 6; Other Information: iduan@tsinghua.edu.cn
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CHINA; ACIDIFICATION; CATIONS; SOILS; DEPOSITION; COAL; COMBUSTION; AIR POLLUTION CONTROL; MATHEMATICAL MODELS; INPUT-OUTPUT ANALYSIS; SULFUR; NITROGEN

Citation Formats

Yu Zhao, Lei Duan, Thorjorn Larssen, Lanhua Hu, and Jiming Hao. Simultaneous assessment of deposition effects of base cations, sulfur, and nitrogen using an extended critical load function for acidification. United States: N. p., 2007. Web. doi:10.1021/es060380+.
Yu Zhao, Lei Duan, Thorjorn Larssen, Lanhua Hu, & Jiming Hao. Simultaneous assessment of deposition effects of base cations, sulfur, and nitrogen using an extended critical load function for acidification. United States. doi:10.1021/es060380+.
Yu Zhao, Lei Duan, Thorjorn Larssen, Lanhua Hu, and Jiming Hao. Thu . "Simultaneous assessment of deposition effects of base cations, sulfur, and nitrogen using an extended critical load function for acidification". United States. doi:10.1021/es060380+.
@article{osti_20885831,
title = {Simultaneous assessment of deposition effects of base cations, sulfur, and nitrogen using an extended critical load function for acidification},
author = {Yu Zhao and Lei Duan and Thorjorn Larssen and Lanhua Hu and Jiming Hao},
abstractNote = {Base cations (BC) play an important role to prevent soil acidification. In certain acid sensitive areas, such as China, BC deposition is high and a considerable fraction is of anthropogenic origin. BC deposition might decrease in the future with the implementation of air pollution control measures. The effect of changes in BC deposition, however, has seldom been considered in critical load calculations based on the steady-state mass balance (SSMB) method. In order to better quantify the importance of the BC deposition for acid deposition mitigation policy, an extension of the SSMB method for critical load calculation for soil acidification is presented. The BC deposition is taken into account as a variable along with sulfur (S) and nitrogen (N) deposition, creating an S-N-BC critical load function. As a case study, critical loads of S and N for the Tie Shan Ping catchment in Chongqing in southwest China under variable BC deposition were calculated. Results indicate that abatement of BC deposition has significant impact on the critical loads of S and N. A 75% reduction in BC of assumed anthropogenic origin decreases the critical loads of acids by 58%. The current deposition does not exceed the critical loads, but if BC deposition from anthropogenic sources was controlled, then the exceedance would be considerable. Uncertainty analysis show that the size of the BC deposition of natural origin is the single parameter contributing the most to the steady-state S and N critical load. The extended critical load function can be used by policy makers to set more reasonable acidity control strategies in the future. The method also highlights for policymakers the 'competition' between emission control of particulate matter driven by human health targets and potential increase of net acid load from such measures. 38 refs., 4 figs., 1 tab.},
doi = {10.1021/es060380+},
journal = {Environmental Science and Technology},
number = 6,
volume = 41,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}