第36卷第4期2023年8月·环境科研·污染防治技术POLLUTIONCONTROLTECHNOLOGYVol.36,No.4Aug.,2023关于农作物秸秆浸泡水污染物析出浓度的研究李婷,张翔?(1.南通环境教育馆,江苏南通226000(2.南通市生态环境监控中心,江苏南通226000)摘要:夏季麦秸秆和秋季稻秸秆遇水浸泡后对水质会产生一定影响,腐烂秸秆的重要超标污染物为总磷,本文通过钼酸铵分光光度法测定总磷在农作物秸秆浸泡后逐步释放,并在第4天达到峰值,此后浓度开始逐渐下降,一周后水质恢复平稳。本文通过实验,连续观测麦秸秆和稻秸秆浸泡水样中的总磷浓度及变化趋势,并得出结论。关键字:农作物秸秆浸泡水浓度中图分类号:X323文献标识码:AStudyonconcentrationandchangetrendofPollutantsreleasedfromwheatstrawandricestrawsoakedwatersamplesLiting',Zhangxiang?(1.NantongenvironmentalEducationMuseum,nantong,jiangsu226000,China;2.NantongenvironmentalMonitorCentre,nantong,jiangsu226000,China;)Abstract:Wheatstrawinsummerandricestrawinautumnwillhaveacertainimpactonthewaterqualityaftersoakinginwater.Theimportantexcessivepollutionofrottenstrawistotalphosphorus.Themethodofmetricandammoniumdatedetectthetotalphosphorusreleasedaftersoakingincropstraw.Thetotalphoshorusreleasedgraduallyafersoakingincropstraw,concentrationgetthepeakandafterthattheconcentrationstarttodropgradually.Thewaterqualitywillbestableaboutaweeklater.Inthispaper,thetotalphosphorusconcentrationandchangetrendofwheatstrawandricestrawsoakedwatersampleswerecontinuouslyobservedandconcluded.Keywords:wheatstrawandricestrawsoakedwater,theconcentration一、实验目的南通地处亚热带季风气候区,农作物小麦和水稻种植面积较大,属于典型的一年两熟地区。由于在秸秆还田期间经常会出现强降雨过程,经浸泡过的降水会将农作物、秸秆内析出的污染物排入周边水体,经常会出现季节性水环境质量下降的情况。南通环境教育馆组织了对小麦和水稻秸秆的连续不间断浸泡实验,对农作物秸秆污染物含量,特别是总磷含量进行研究。二、实验材料与方法1.实验材料:红桶3只,麦秆0.4千克,稻秆0.4千克,泥土各0.8千克,实验用纯水各4.8L。2.天气情况:基本为多云到晴好天气,室温约为18~20℃。3.样品准备:在麦秆、稻秆和泥土重量固定的情况下,每24小时取150ml的水量,检...