Assessing industrial pollution by means of environmental samples in the Kemi-Tornio region

摘要: The results of the comparison various dissolution methods for sulphur showed, that HNO3 together with H2O2 gave more complete decomposition organic components than alone. acid procedure a mixture HNO3+H2O2 slightly underestimated S concentrations plant material. losses were highest in dry ashing digestion (HF(DAC)). Leco combustion technique infrared (IR) detection good precision and accuracy sulphur. For determination heavy metals materials, both procedures especially effective determining Cr. However, HNO3+HClO4 lower results, HF HF(DAC) greater values Sulphur accumulation pine needles around pulp paper mills was clearly higher other points Kemi area. example, within radius about 1-1.5 km Oy Metsa-Botnia Ab Mills, (C) (C+1) 28 % 26 those corresponding background samples collected Kuivaniemi at distance 25 from Kemi. Pine do not appeared to be appropriate method monitoring Fe, Zn, V Pb emitted mills. Ca vicinity Mills 48 average concentration calculated all needles; thus it is likely part derived regional distribution pattern Cr Ni mosses Kemi-Tornio area 2000 showed most polluted (Cr > 200 μg/g 20 μg/g) lie few kilometres ferrochrome stainless steel works AvestaPolarit Stainless Oy. Within this area, 4-13 times outside urban Tornio. by opencast chromium mining complex < immediate complex. All 95th percentile TSP (total suspended particles) mine Chrome Mine below current Finnish air quality limit value 300 μg/m3. 98th exceeded guideline 120 μg/m3 one site. According leaching studies, sum annual airborne pollution impact watersoluble fraction (H2O) environmentally mobile (CH3COONH4) 1.2 kg, Fe 29 Cu 63 2.5 kg Cd 100 mg. homogeneity studies metal deposition on filters, Cr, Ni, non-uniformly distributed over glass fibre filters. rsd varied between 5.4-33.9 7.5-35.0 3.6-25.9 Cu, 6.6-19.9 Fe.