广西秸秆燃烧大气污染物排放及生物炭转化固碳量估算  

Emission of air pollutants from straw burning and estimation of carbon sequestration from biochar transformation in Guangxi

作　　者：罗意然 韦进毅 郭送军 陈来国 LUO Yiran;WEI Jinyi;GUO Songjun;CHEN Laiguo(School of Resources,Environment and Materials,Guangxi University,Nanning Guangxi 530004;Guangdong Province Engineering Laboratory for Air Pollution Control,South China Institute of Environmental Science,Ministry of Ecology and Environment,Guangzhou Guangdong 510655)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]生态环境部华南环境科学研究所,广东省大气污染控制工程实验室,广东广州510655

出　　处：《环境污染与防治》2022年第8期993-1000,1008,共9页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41373109、No.41573123、No.41163008、No.41773130);广西自然科学基金资助项目(No.2014GXNSFAA118301、No.2013GXNSFAA019286)。

摘　　要：根据广西主要农作物产量,采用排放因子法对秸秆燃烧污染物排放量和碳释放量进行了估算,建立了2020年广西秸秆燃烧污染物排放清单和挥发性有机物(VOCs)物种清单,并对VOCs臭氧生成潜势(OFP)进行评估。结果表明:(1)2011—2020年广西主要农作物秸秆总量呈现增长趋势,每年秸秆燃烧量平均约占农作物秸秆总量的29%;水稻、玉米和甘蔗是广西农作物秸秆的主要来源,也是秸秆燃烧排放大气污染物的主要贡献源;(2)2020年广西秸秆燃烧VOCs和OFP总量分别为33020.32、143474.09 t,其中,含氧有机物和芳香烃是秸秆燃烧VOCs排放贡献最大的两类组分;(3)大气污染物排放强度高值区主要集中在广西中部和南部地区,如贵港、玉林和北海;(4)2020年广西秸秆燃烧碳排放总量达2.68×10^(6) t,将农作物秸秆全部转化为生物炭,估算的固碳量可达3.72×10^(6) t。According to the output of main crops in Guangxi,the emission factor method was used to estimate the emission of pollutants from straw burning and the amount of carbon released.The emission inventory of pollutants from straw burning and the VOCs species list in Guangxi in 2020 were established,and the ozone generation potential(OFP)of VOCs was evaluated.The results showed that:(1)from 2011 to 2020,the total amount of crop straw in Guangxi showed an increasing trend,and the average annual straw burning accounted for about 29%of the total amount of crop straw.Rice,corn and sugarcane were the main sources of crop straw in Guangxi,and also the main contribution sources of air pollutants emitted by straw combustion.(2)The total VOCs and OFP of straw burning in Guangxi in 2020 were 33020.32 and 143474.09 t,respectively,in which oxygen-containing organic compounds and aromatic hydrocarbons contributed the most to the VOCs emissions from straw burning.(3)The areas with high emission intensity of air pollutants were mainly concentrated in the central and southern regions of Guangxi,such as Guigang,Yulin and Beihai.(4)In 2020,the total carbon emission from straw burning in Guangxi reached 2.68×10^(6) t,and the estimated carbon sequestration could reach 3.72×10^(6) t if all crop straw in Guangxi was converted into biochar.

关 键 词：秸秆 燃烧 排放清单 空间分布 生物炭 固碳量 

分 类 号：X71[环境科学与工程—环境工程]