《底泥重金属解析过程动力学研究》-毕业论文设计（学术).docVIP

武汉工业学院 毕业论文 论文题目：底泥重金属解析过程动力学研究 姓 名 学 号 081302123 院 系 化学与环境工程学院 专 业 环 境 工 程 指导教师 2012年5 月24日 底泥重金属解析过程动力学研究 摘 要 随着经济的快速发展和人口的逐年增长，工业废水及生活污水带来的环境问题日益严重，城市河道污染也在逐步加剧。纳入水体的重金属大部分在物理沉淀、化学吸附等作用下迅速由水相转入固相，沉积于河涌底泥中，在环境条件发生改变时就可能被重新释放出来，使水体的重金属浓度增高，出现明显的二次污染。水体底泥中的重金属污染，已成为世界关注的环境问题。 本次论文主要是底泥重金属解析过程动力学的研究。以重金属Cu、Cr为例，研究pH和温度对其在底泥中解析过程动力学速度的影响。实验时，控制单因素变量，测量重金属浓度的变化趋势。结果表明，pH在4~6之间增长时，对底泥中Cu、Cr的析出有抑制作用，温度在30℃~50℃之间增长时，对底泥中的Cu、Cr析出有促进作用。通过对论文的完成，可对解决底泥中的重金属的污染问题提供初步事实依据。 关键词：底泥；重金属；动力学研究；铜；铬 Abstract With the increasingly serious environmental problems caused by the rapid economic development and population growth year after year, industrial wastewater and sewage, urban river pollution has gradually intensified. Into the water body of heavy metals most of the physical sedimentation；chemical adsorption effect rapidly from water onto solid phase deposited in the creek sediment may be re-released in the environmental conditions change, so that the water concentrations of heavy metals increased secondary pollution. Heavy metal contamination in the sediment of water has become the worlds environmental concerns. This thesis is the sediment dynamics of heavy metals in the resolution process. Heavy metals Cu, Cr, for example, pH and temperature on the resolution process dynamics speed in the sediment. Experiment, the control of a single factor variable, measuring the changes in trends in the concentrations of heavy metals.The results show that the growth of the pH between 4 to 6, inhibit the precipitation of sediment Cu, Cr, when the growth temperature between 30 ℃ ~ 50 ℃ in sediment Cu and Cr precipitates have a catalytic role. Through the completion of the thesis,