吕梁市北川河中重金属铅的变化特征分析 近年来，水环境的质量问题一直是众多学者研究的热点问题，尤其对河流中重金属的研究，可以很好地反映出环境中重金属的污染状况。 本研究于2020年10月24日和2021年3月13日分两次采集了吕梁市北川河的8个河流水样品，用原子吸收光谱法测定了样品中Pb的总量及水溶态含量。与地表水环境质量标准和城镇污水处理厂污染物排放标准做了比较，利用单因子指数法和潜在生态危害指数法对吕梁市北川河中重金属铅进行评价。 研究结果表明，水样中重金属Pb的总量最高为410.9μg/L；水样中重金属Pb的总量最低为22.3μg/L，平均值为142.3μg/L，变异系数为103.7%。吕梁市北川河中重金属Pb的含量在冬季的实测值超过了污染物排放标准限值，利用单因子污染指数法可看出属于轻度污染，春季的实测值没有超过污染物排放标准限值，利用单因子污染指数法可看出属于无污染，整体上利用潜在生态危害指数法可知，吕梁市北川河中重金属Pb的生态危害为轻微生态危害。 关键词：吕梁市北川河；重金属；铅元素； Abstract In recent years, the quality of water environment has been a hot topic for many scholars, especially the study of heavy metals in rivers, which can well reflect the pollution of heavy metals in the environment. In this study, eight water samples from Beichuan River in Luliang City were collected on October 24, 2020 and March 13, 2021 respectively. The total amount of Pb in the samples and the water-soluble content of Pb in the samples were determined by atomic absorption spectrometry.Compared with the environmental quality standards of surface water and pollutant discharge standards of urban sewage treatment plants, the heavy metal lead in Beichuan River of Luliang City was evaluated by single factor index method and potential ecological harm index method. The results showed that the maximum content of heavy metal Pb in water samples was 410.9μg/L.The total amount of heavy metal Pb in water samples was 22.3μg/L, the mean value was 142.3μg/L, and the coefficient of variation was 103.7%.Heavy metal Pb content in luliang city of beichuan river in the winter of the measured values than the value of pollutant emission standards, which using the method of single factor pollution index can see belong to light pollution, the measured values of spring more than value of pollutant emission standards, which using the method of single factor pollution index can see belong to pollution-free, overall use of index method of potential ecological harm,The ecological harm of heavy metal Pb in Beichuan River of Luliang City is slight ecological harm. Key words: Beichuan River in Luliang City;Heavy metals; element Pb;. 目 录 第1章 绪 论 1 1.1研究目的与意义 1 1.2国内外研究现状 2 1.2.1国内研究现状 2 1.2.2国外研究现状 2 1.3研究内容 2 1.4测定方法 3 第2章 样品采集与分析 4 2.1样品采集与处理 4 2.1.1研究区域概述 4 2.1.2实验仪器和试剂 5 2.1.3样品的采集前准备与采集 5 2.1.4样品的预处理 5 2.2元素Pb的标准溶液的配制 6 第3章 结果与分析 7 3.1元素Pb的标准曲线的绘制 7 3.2重金属Pb在不同形态下的变化特征分析 8 3.2.1分析重金属Pb总量的变化特征 8 3.2.2重金属Pb总量的时空分析 8 3.2.3分析重金属Pb在水溶态下的变化特征 9 3.3与相关性标准比较 10 3.3.1与地表水环境质量标准比较 10 3.3.2与城镇污水处理厂污染物排放标准比较 10 3.4本章小结 11 第4章 评价方法 12 4.1单因子指数法 12 4.2潜在生态危害指数法 13 4.3评价分析 13 第5章 结 论 15 参考文献 17
*若需了解更多与协助请咨询↓→[电脑QQ][手机QQ]【数据协助】
