太湖梅梁湾磷化氢气体浓度和通量日变化  

DIURNAL VARIATION OF PHOSPHINE CONCENTRATION AND FLUX IN MEILIANG BAY,LAKE TAIHU

作　　者：韩超[1] 耿金菊[1] 张娟[1] 鲜啟鸣[1] 王晓蓉[1] 任洪强[1] 杨龙元[2] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093 [2]中国科学院南京地理与湖泊研究所,南京210008

出　　处：《环境化学》2010年第3期347-351,共5页Environmental Chemistry

基　　金：国家重点基础研究发展计划(973)(2008CB418003);江苏省自然科学基金项目(BK2008276);国家自然科学基金项目(No.20607009);水体污染控制与治理科技重大专项(2008ZX07316-004)

摘　　要：以太湖梅梁湾湖区为研究对象,考察水面上空磷化氢浓度和水-气界面磷化氢释放通量的日变化.结果表明,白天大气中磷化氢浓度(7.39±7.00)ng.m-3显著低于夜间(37.05±22.74)ng.m-3,光照是影响大气中磷化氢浓度的主要因素.磷化氢通量全天正负交替,白天平均通量(11.41±23.76)ng.m-2.h-1,水体为磷化氢的释放源;夜间平均通量为(-37.62±26.45)ng.m-2.h-1,水体表现为磷化氢的汇;一天内平均日变化为(-13.11±35.04)ng.m-2.h-1,磷化氢总体为从大气向水体迁移的过程.磷化氢通量与水温显著正相关,而与大气中磷化氢浓度显著负相关.相关性分析表明磷化氢与温室气体(甲烷、二氧化碳和氧化亚氮)均呈现负相关.Diurnal variation of phosphine（PH3）in ambient air and it＇s flux at the water-air interface of Meiliang Bay,Lake Taihu was monitored in this study.Results show that atmospheric PH3 concentration in the day time（7.39±7.00 ng·m-3）was significantly lower than that at night（37.05±22.74 ng·m-3）,indicating sun light plays an important role in the elimination of PH3.The flux of PH3 alternated between positive and negative during the day,PH3 transfered from water into air with a flux of（11.41±23.76）ng·m-2·h-1 during the day;while it precipitated into the water with a flux of（-37.62±26.45）ng·m-2·h-1 during the night.In general,PH3 transfered from the atmosphere to the water with a mean flux of（-13.11±35.04）ng·m-2·h-1.The PH3 flux is positively correlated with water temperature,while negatively correlated with the atmospheric PH3 concentration.The negative linear relationship exists between ambient PH3 concentration and CO2,N2O and CH4 concentration,respectively.

关 键 词：磷化氢 浓度 通量 日变化 温室气体 梅梁湾湖区 

分 类 号：X51[环境科学与工程—环境工程]