煤矸石堆场地表径流Fe、Mn、SO_4^(2-)污染特征及其对植物种苗生长的影响——以贵阳市废弃煤矿区为例

Gangue yard surface runoff Fe、Mn、SO_4^(2-) Pollution characters and the influence of plant seedlings growth——HuaXi district of GuiYang city's abandoned coal mining area as an example

通过对贵州省花溪区麦坪乡废弃煤矸石堆场进行调查,按煤矸石堆场中心区、煤矸石堆场外缘区、无煤矸石堆场区进行地表径流采样,探讨煤矸石堆场地表径流污染特征及其对植物种苗生长的影响。研究结果表明:在受到降雨地表径流的直接作用下,煤矸石堆场地表径流pH值达2.27~5.51,主要污染物(Fe、Mn、SO24-)的浓度以外缘区高于中心区。地表径流Fe、Mn、SO24-的浓度对植物种苗萌发生长产生影响,通过选取3个区域特征水样对5种植物种子(白三叶、绿化黑麦、牧草黑麦、红三叶紫、花苜蓿)进行研究,可知白三叶种子萌发及生长情况不受3个不同的浓度水样影响;绿化黑麦在中心区水样的处理下体现了最好的耐性,萌发情况也最好;而牧草黑麦、红三叶和紫花苜蓿,在中心区和边缘区地表径流水的处理下的都能体现较强的耐性,对照区处理液对种子的萌发情况影响均不大。

Through investigation at abandoned coal yard in MaiPing township,HuaXi district,GuiYang city,GuiZhou province.We sampling on surface runoff according to Gangue yard centre、Gangue yard tillu area and No coal yard area.We explore the surface runoff pollution characteristics of gangue yard and its influence of plant seedlings growth.The results of the study indicate that under direct action of Rainfall runoff＇s influence.Gangue yard surface runoff pH value reaches 2.27~5.51,The main pollutants concentration（Fe、Mn、SO2-4）in the outer zone above centre.Surface runoff concentrations influence on plant seed germination growth.By choosing three regional characteristics on the five types of plant seed samples（aqueous,Greening rye,Forage rye,Red three assists,Flower alfalfa）were studied,we know that there is no influence by aqueous＇ Seed germination and growth from three different concentration samples.Greening rye in central processing under water reflected the best patience.Germination condition is the best too.In internal area and peripheral area surface runoff water treatment can reflect strong patience.Controlled zone disposing liquid＇s influence on seed germination condition effects was little.