Graphite furnace atomic absorption spectrophotometer

石墨炉原子吸收光谱仪(AAS-GF)工业、商业和分散的农业废物通过各种途径对土地、盆地、港口或湖泊中的沉积物和土壤造成污染。大多数地点含有痕量或更高浓度的重金属(HM=铅、锌、镉、铬和镍)。重金属具有固有的持久性；它们既不是人为或生物过程产生的，也不是被破坏的，尽管它们可能会经历各种形态变化。高速公路径流中含有大量碱金属(钠、钙)的除冰盐需要引起我们的关注，并正在进行研究。在加拿大，大量使用除冰盐。钠和钙进入水体，破坏化学平衡，增加毒性。拉瓦尔大学研究人员正在进行的各种研究项目需要在痕量(ug/L)和更高浓度水平(Ppm)进行金属分析。除了与我的研究项目相关的分析需求外，我还与拉瓦尔大学的教授们进行了其他联合研究项目。与Locat等人合作。研究了盐度对Saguenay Fjord沉积物中重金属形态和迁移的影响。我们与LOCAT和Leroeuil一起评估了方解石衬里在保留重金属方面的性能。莱萨德研究了活性污泥法和生物滤池中废水的生物降解。与Konrad合作，我们研究了盐类对土壤孔隙水化学的影响以及由此引起的岩土工程变化。Marchand及其合作者进行的混凝土研究旨在研究除冰盐对混凝土结构耐久性的影响。AAS-GF是金属分析的推荐技术，将提高我们环境实验室的分析能力。这将对高素质学生和人才的培养产生重大影响。

GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROPHOTOMETER (AAS-GF). Industrial, commercial and diffuse agricultural wastes have contributed through various pathways, to the contamination of sediments and soils in lands, basins, ports or lakes. Most sites contain Heavy metals (HM = Pb, Zn, Cd, Cr, and Ni) at trace or higher concentrations.  Metals are inherently persistent; they are neither created nor destroyed by anthropogenic or biological processes, although they may undergo various speciation changes. De-icing salts in highways runoff carrying large amounts of alkaline metals (Na, and Ca) need our attention and are being investigated. In Canada de-icing salts are used in large quantities. Na and Ca find their way to water bodies, disrupting chemical equilibrium and increasing toxicity. The various research projects being conducted by Laval University researchers need metal analysis at trace (ug/L) and higher concentration levels (ppm). In addition to the analytical needs associated to my research program other joint research projects are conducted with professors at Laval University. With Locat et al. we study the salinity influence on heavy metal speciation and migration within Saguenay Fjord sediments. With Locat and Leroeuil we work on the evaluation of the performance of a calcite liner in terms of the retention of heavy metals. Lessard studies the biological degradation of waste waters in activated sludge process and in biofilters. In collaboration with Konrad we study the impact of salts in soil pore water chemistry and resulting geotechnical changes. Research in concrete conducted by Marchand and collaborators aim to study the influence of deicing salts in the durability of concrete structures. AAS-GF is the recommended technique for metal analysis and will increase the analytical capabilities of our environmental lab. This will have a big impact in the training of highly qualified students and personnel.