江西千烟洲大气降水和河流酸化特征对比分析

摘要：对2013年江西千烟洲地区大气降水和河流进行采样对比分析，研究结果表明：（1）江西千烟洲地区降水呈现出酸性，同处亚热带森林地区的河流呈现出弱酸—弱碱性。（2）用SO42-+NO3-]当量浓度估算出来的大气降水和河流酸度相差不大，降水和河流pH的差异主要与它们碱性物质含量不同有关。（3）江西千烟洲地区由于大量降水和地表森林覆盖度较高，大气中碱性气溶胶含量较少，对酸缓冲能力较弱；河流通过土壤淋溶出大量的Ca2+、Mg2+等阳离子，酸中和能力较高，对酸缓冲敏感。

Comparative Analysis of Characteristics of Atmospheric Precipitation and River Acidification in Qianyanzhou, Jiangxi Province

Abstract: Based on the sampling and comparison analysis of atmospheric precipitation and rivers in Qianyanzhou, Jiangxi Province in 2013, the results show that: (1) the precipitation in the Qianyanzhou area of Jiangxi Province is acidic, and the rivers in the subtropical forest areas show weak acid-weak alkaline. . (2) The atmospheric precipitation and river acidity estimated by the SO42-+NO3-] equivalent concentration are not much different. The difference between precipitation and river pH is mainly related to their different basic substances. (3) Due to the large amount of precipitation and surface forest cover in Jiangxi Qianyanzhou area, the alkaline aerosol content in the atmosphere is less, and the acid buffering capacity is weaker; the river leaches a large amount of Ca2+, Mg2+ and other cations through the soil, acid High neutralizing ability, sensitive to acid buffering.