沸石对土壤中重金属铅去除效果研究.docx

研究沸石对土壤中重金属铅的影响专业：给排水科学与工程学生：尹德添 指导教师：梁英摘要随着全球化的经济和城市建设发展，土壤污染的问题越来越突出。大量含重金属的污染物经过工业和生活废水排放、固体废弃物的堆积、农药化肥施用和大气降尘等途径进入土壤，造成了严重的土壤重金属污染。我国土壤重金属污染形势比发达国家严重程度更是有过之而无不及之势。铅是重金属元素中最软的金属也许不为我们所知，但随着近年来多起引人关注的儿童血铅超标、铅污染土壤以及粮食中含重金属铅严重超标等事件被报道，使得铅的名声可谓臭名昭著。所以，近年人们对污染土壤中重金属的治理去除进行了大量的研究，目前，主要有人们对重金属的治理方法主要有生物方法、物理方法和化学方法等。在此次实验中，我们采用化学方法中最常用投加沸石矿物改良剂的方法，对土壤投加沸石改良剂的方法成本低廉、简单易行并且我国沸石矿物储量丰富，希望能对改型沸石的对土壤中铅的去除有更全面的了解，希望能够为提高沸石对铅的去除效率提供帮助。通过对实验数据的分析我们得到以下结论：（1）沸石矿物骨架基本单元独具的多孔结构和其结晶化学性质使得其对水分子有很强的亲和力，使得土壤有良好的保水性。（2）沸石不仅可以提高土壤中的阳离子交换，提高土壤的蓄水量，还可是提高土壤的PH。（3）酸性条件下去除土壤中的铅所用的沸石投加量比中性条件下的沸石投加量大。（4）污染土壤中的重金属铅离子的处理过程中，还原态和醋酸可提取态的含量被大量吸附、固定，对氧化态的处理吸附同时会对其产生少量激发释放。关键词：重金属铅、、沸石、污染土壤Resarch of Zeolite on the Impact of Pb in SiolMajor:: Water supply and drainage engineeringStudent：Detian Yin Instructor：Ying LiangAbstractWith the globalization of economic and urban development, causing more and more problems of soil pollution.After a large number of pollutants containing heavy metal by industrial and domestic wastewater, solid waste accumulation, pesticide and fertilizer application and atmospheric dust and other ways into the soil, causing serious soil heavy metal pollution.Heavy metal pollution situation in China was more than in developed countries severely.Lead is aheavymetalelementinsoftestperhapsthat we do not know,but in recent years,with severalhigh-profilein childrens blood leadexceeded,lead-contaminatedsoiland foodcontainingheavy metals leadand other incidentshave been reportedseriously overweight, making the leadreputationstinks.Therefore, in recent years, people on the governance of heavy metal contaminated soil removal done a lot of research,Currently,People on the governance of the main methods of heavy metals such as biological methods, physical and chemical methods.In this experiment,We use the most common chemical dosing zeolite mineral modifier method,Zeolite on soil improver dosing method is cheap, simple and Chinese zeolite mineral reserves are abundant, hoping modified zeo