Graphite furnace atomic absorption spectrophotometer

石墨炉原子吸收分光光度计。工业、商业和扩散的农业废物通过各种途径对土地、盆地、港口或湖泊的沉积物和土壤造成污染。大多数站点含有微量或更高浓度的重金属（HM = Pb、Zn、Cd、Cr和Ni）。金属本身具有持久性；它们既不会被人为或生物过程所创造，也不会被破坏，尽管它们可能经历各种各样的物种形成变化。高速公路径流中含有大量碱性金属（Na和Ca）的除冰盐需要引起我们的注意，并正在进行调查。在加拿大，除冰盐被大量使用。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（ppm）水平上进行金属分析。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进行了其他联合研究项目。Locat等研究了盐度对Saguenay Fjord沉积物中重金属形态和迁移的影响。我们与Locat和Leroeuil合作，对方解石衬垫的重金属保留性能进行了评估。Lessard研究了活性污泥法和生物过滤器中废水的生物降解。在与康拉德的合作下，我们研究了盐对土壤孔隙水化学的影响以及由此产生的岩土变化。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。这将对培养高素质的学生和人才产生重大影响。

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.