百色市三种常见绿化植物对二氧化硫吸附效果及影响因素

Adsorption Effect of Three Common Green Plants from Baise on Sulfur Dioxide and Its Influence Factors

为探究广西百色市区绿化植物芒果[Mangifera indica L.]、大叶榕[Ficus altissima]和红花羊蹄甲[Bauhinia blakeana Dunn]的叶片对SO_2气体的吸附效果,建立了一种微型的SO_2大气污染环境模拟系统。结果证明三种绿化植物对SO_2均有较好的吸附作用,清除能力强弱依次为:芒果>红花羊蹄甲>大叶榕。三种叶片对SO_2的清除率与用量存在显著的相关性,但与含水量、比表面积无明显相关,植物叶片自身的结构差异性是决定吸附SO_2能力的关键因素。此外,三种叶片对SO_2的清除率还受温度和光照强度影响。地处亚热带的百色市光照强度有利于吸收SO_2,丰富的芒果、大叶榕及红花羊蹄甲等街道绿化植物可以改善空气质量。

A miniature environment simulation system polluted by SO2 was established to evaluate the removal effect of SO2 from leaves of Mangifera indica L.,Ficus altissima and Bauhinia blakeana Dunn in Baise city of Guangxi. The results showed that three kinds of green plants had good adsorption effects on SO2 with the average adsorption capacity as follows： M. indica L. B. blakeana Dunn F.altissima. There was a significant correlation between the SO2 clearance rate and the amount of these three leaves,while no correlation with the water content and specific surface area. The structural difference of the tree leaves might be the key factor in determining the SO2 adsorption capacity. In addition,the SO2 clearance rates of three kinds of leaves were also affected by temperature and light intensity. The light intensity was conducive to the absorption of SO2 as Baise city is located in the subtropical monsoon region. Planting trees on both sides of the street,including M. indica L.,F. altissima and B. blakeana Dunn,can improve the air quality.