高速城市化地区的露水酸化了吗?  

Is dew acid in the rapid urbanization area?

作　　者：叶有华[1,2] 周凯[3] 彭少麟[2] 林石狮[1,2] 

机构地区：[1]国家环境保护饮用水水源地管理技术重点实验室/深圳市环境科学研究院,广东深圳518001 [2]中山大学有害生物控制及资源利用国家重点实验室,广东广州510275 [3]河南科技学院园林学院,河南新乡453003

出　　处：《生态环境学报》2012年第11期1916-1922,共7页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(30670385);教育部重大项目(704037);广东省特聘教授(珠江学者)基金项目;the Key Program of Ministry of Education of China (403037);the Scientific Research Fund; Hongda Zhang; Sun Yat-sen University~~

摘　　要：高度城市化地区的城市露水被假设为已经酸化。为了验证其是否已酸化,实验在广州市的商业区、工业区、住宅区和森林公园4个功能区展开。布片法被应用于收集城市露水,测试过程收集了25个城市露水样品,其酸性强度用pH值表示。结果显示,不同功能区露水的平均酸度不同,样品的pH值介于4.47到4.95之间。根据城市露水酸度的最大值,天河商业区的露水酸度最强(pH=3.63),白云山森林公园的酸度较弱(pH=5.3)。城市区域的露水pH值低于郊外的露水pH值,同时也低于其他国家露水pH测定值,且显著低于帽峰山森林公园的露水pH值。这些研究结果暗示高度城市化的广州各功能区,其上凝结的露水已酸化,露水也许可以作为环境污染的指示指标。We hypothesized that the urban dew was acid in rapid urbanization area. In order to test this hypothesis, dew was measured using cloth-plate method and its acidity was evaluated by the pH value. Twenty five dew samples were collected in summer in Guangzhou, China. Results showed that different landscape obtained a different mean pH value of dew ranging from 4.47 to 4.95. Based on the extreme values in urban area, Tianhe commercial landscape observed the lowest pH in minimum （pH=3.63）, while the highest extreme value were found in Baiyunshan forest landscape （pH=5.3）. The pH values of dew in urban area were lower than those in the countryside and in most measured sites of other countries, and significantly lower than those in Maofengshan forest landscape. These results suggested that urban dew was acid in summer in the rapid urbanization area, and acid dew probably could be regarded as an index of polluted environment.

关 键 词：城市露水 PH 酸化 城市功能区 城市化 

分 类 号：X16[环境科学与工程—环境科学]