秸杆燃烧中OCS的排放因子和排放估算  

Emission Factors of Trace OCS from Crop Residues Burning and Estimation Its Amount in China

作　　者：曹美秋[1] 庄亚辉[1] 

机构地区：[1]中国科学院生态环境研究中心

出　　处：《环境科学》1996年第1期34-36,共3页Environmental Science

基　　金：国家重大自然科学基金

摘　　要：建立了痕量羰基硫采样及分析方法，利用低温预捕集和被捕集样直接释放进入分离柱技术，对压缩空气进行采样测定，得出了压缩空气中ＯＣＳ约在２．９４×１０－３μｇ／Ｌ，方法精确度以标准误差系数计为±０．７２％。利用此采样及分析方法对实验室规模的生物质封闭燃烧系统，稻草、玉米秸、麦杆燃烧过程中排出痕量ＯＣＳ进行了采样分析，得出稻草、玉米秸、麦杆燃烧排气中ＯＣＳ的排放量，以排放因子表示分别是：１．８０ｇ／ｔ，２．７５ｇ／ｔ，２．０５ｇ／ｔ。详细统计了作物秸杆量，建立了全国各县各种作物秸杆燃烧释放痕量气总体和网格排放计算的数学模式。利用排放因子计算了几种主要作物秸杆燃气中ＯＣＳ的释放量。A method of sampling and analysis for trace carbonyl sulfide has been described.The sample is trapped and concentrated at temperature of liquid N2 and liberated directly into a gas chromatographic column.The concentration of OCS in compressed air as determined as 2.94×10-3μg/L.The method accuracy expressed in term of standard deviation coefficient is ±0.72%.The emission factors of carbonyl sulfide,which were measured during the combustion of rice straws,maize stalks and wheat stalks in an enclosed combustion system,are 1.80,2.75 and 2.05g/t for rice straws,maize stalks,and wheat stalks.individual.Standard deviation coefficient are±6.67%,±8.36%,and 9.27% for rice straws,maal stalks,and wheat stalks, respectively.Distribution of the amount of crop residues burned in China is presented with a resolution 1°latitude×1°longitude.The amount of trace OCS could be calculated with their emission factors.

关 键 词：羰基硫 排放因子 排放估算 秸杆燃烧 二氧化硫 

分 类 号：X132[环境科学与工程—环境科学]