Subproject 16

Analysis of metals and nonmetals in groundwater

This subproject aims to evaluate the route of exposure and potability of groundwater in relation to metals and metalloids of the CONAMA 396 Standard. Scientific Committee (CTC) of the UFMG of the Brumadinho-UFMG Project, consisting of 147 sampling points.

This objective is divided into:

  • Receive the groundwater samples collected in the presence of an independent auditor, hired by the bidder, and also a member of the CTC;
  • Carry out the preparation of samples to determine the contents of dissolved elements, when necessary, in accordance with the SMWW 3030E procedure, described in the Standard Methods of Examination of Water and Waste water;
  • Carry out the preparation of samples to determine the total contents of the elements according to the SMWW 3030E procedure, when necessary;
  • Perform validation of methods;
  • Carry out the data treatment applying chemometric data grouping tools, PCA and HCA, to evidence similarities between samples, grouping parameters and correlations between measured parameters;
  • Show, in the sample map provided by the CTC, the distribution profile of the elements in the region of the Paraopeba river basin.

 

Methodological steps:

1st Stage - In accordance with CONAMA resolution 396/2008, the total contents of metals and metalloids that will be determined are: Ag, Al, As, B, Ba, Be, Cd, Co, Cr, Cu, Fe, Hg, Li, Mn, Mo, Na, Ni, Pb, Sb, Se, U, V and Zn.

2nd Stage - According to the CTC recommendations, the determination of metals and metalloids in well water, in higher concentrations (mg/l) should be carried out according to SMWW 3111B or 3120B and in lower concentrations (μg/l) according to SMWW 3125B of Standard Methods the Examination of Water and Waste Water, or according to EPA 200.7. Mercury may also be determined per EPA 7471 B, EPA 7473.

3rd Step - Application of method 3111B - direct determination of metals by air-acetylene flame atomic absorption spectrometry

4th Step - Application of method 3120B - determination by inductively coupled plasma optical emission spectrometry (ICP OES)

5th Step - Application of method 3125B - determination by inductively coupled plasma mass spectrometry

6th Step - Application of method 200.8: determination of trace elements in water by ICP-MS

7th Step - The results obtained from the analysis of groundwater samples will be evaluated using exploratory chemometric tools, such as PCA and HCA to obtain information on similarity between samples and correlation between variables.rdo with the sampling plan provided by the Scientific Technical Committee (CTC ) of the UFMG of the Brumadinho-UFMG Project.

 

Meet the team!

Subproject Timeline 16

Month 1 (12/2020)
Month 2 (04/2021)

• Receipt of samples with the presence of a certified auditor and a member of the CTC;
• Acquisition of consumable and permanent materials from FUNDEP;
• Determination of metals and metalloids dissolved in groundwater samples by ICP-MS;
• Preparation of samples for determination of total elements and determination by FAAS;
• Verification of method quality parameters;
• Evaluation of the method's merit parameters;
• Data treatment applying PCA and HCA chemometric tools;
• Preparation of the sample map with the distribution profile of metals and metalloids;
• Preparation of reports.

• Receipt of samples with the presence of a certified auditor and a member of the CTC;
• Determination of metals and metalloids dissolved in groundwater samples by ICP-MS;
• Preparation of samples for determination of total elements and determination by FAAS;
• Evaluation of the method's merit parameters;
• Data treatment applying PCA and HCA chemometric tools;
• Preparation of the sample map with the distribution profile of metals and metalloids;
• Preparation of reports.

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