玉米须对大气细颗粒物的吸附及监测潜能分析  

Analysis of atmospheric fine particles adsorption and biomonitoring potential of corn silk

作　　者：孟不凡 钱景皓 王雯欣 郑桂灵[1] 李鹏[1] MENG Bu-fan;QIAN Jing-hao;WANG Wen-xin;ZHENG Gui-ling;LI Peng(School of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,China)

机构地区：[1]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《农业环境科学学报》2020年第6期1207-1212,共6页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(41571472);山东省大学生创新创业训练计划项目(S201910435049);青岛农业大学大学生创新训练项目(2019-220)。

摘　　要：通过分析中国主要玉米产区山东省17个地区的玉米须和叶片滞留细颗粒物(PM2.5)的能力,并与当地常规大气PM2.5浓度监测结果进行相关性分析,探寻利用当地农作物资源进行大气颗粒物生物监测的可能。结果显示:山东沿海地区大气PM2.5浓度明显低于内陆地区,与之对应的是,玉米须上PM2.5含量低的地区也位于沿海,而利用玉米叶的监测无此结果。相关性分析表明,玉米叶片上PM2.5含量与大气中PM2.5浓度无相关性,而玉米须上PM2.5滞留量与大气中PM2.5月平均浓度和雨后平均浓度均存在显著的正相关(P<0.01),说明玉米须可有效地、较长时间地滞留细颗粒物。研究表明,玉米须上PM2.5的量不但能反映大气PM2.5的污染程度,还能反映大气PM2.5的污染分布,利用玉米须来监测大气PM2.5的污染状况具有很大的应用潜力。To investigate the possibility of using local crops for biomonitoring of particulate matter,corn silk and corn leaves were collected from 17 regions of Shandong Province,a major corn-producing area in China.The mass concentrations of atmospheric fine particles(PM2.5)adsorbed by these materials and the correlation with the results of local PM2.5 monitoring results acquired through conventional methods were analyzed.The results showed that the PM2.5 concentrations in the coastal areas of Shandong were significantly lower than those in the inland areas.Correspondingly,biomonitoring using corn silk showed that areas with a low PM2.5 concentration were mostly located in coastal areas.In addition,the amount of PM2.5 retained by corn silk was significantly positively correlated with the monthly average atmospheric PM2.5 concentration and the average after-rain atmospheric PM2.5 concentration(P<0.01);however,this phenomenon was not observed in corn leaves.Therefore,corn silk could retain PM2.5 for longer and more effectively.The amount of PM2.5 on corn silk reveals not only the degree of air pollution owing to PM2.5 but also the distribution of atmospheric PM2.5 pollution.Our findings demonstrate that corn silk,which is an agricultural waste,has great application potential in monitoring atmospheric PM2.5 pollution.

关 键 词：大气污染 玉米须 PM2.5 生物吸附 生物监测 

分 类 号：X513[环境科学与工程—环境工程] X831