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Bäckström, MattiasORCID iD iconorcid.org/0000-0002-2674-4994
Publications (10 of 102) Show all publications
Uwayezu, J.-N., Yeung, L. W. Y. & Bäckström, M. (2019). Sorption of PFOS isomers on goethite as a function of pH, dissolved organic matter (humic and fulvic acid) and sulfate. Chemosphere, 233, 896-904
Open this publication in new window or tab >>Sorption of PFOS isomers on goethite as a function of pH, dissolved organic matter (humic and fulvic acid) and sulfate
2019 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 233, p. 896-904Article in journal (Refereed) Published
Abstract [en]

Understanding the distribution of PFOS isomers between the aqueous phase and goethite is crucial, since it is an abundant sorbent and thus may have a large influence on the mobility of PFOS. This study was conducted to understand the effects of pH, humic acid (HA), fulvic acid (FA) and sulfate on sorption of PFOS isomers. The results will increase the understanding about what parameters may control the fate and transport of PFOS in surface and ground water.

The study was conducted by adding PFOS spiked water to a goethite slurry with different aqueous chemistry. Levels of total PFOS and PFOS isomers were quantified using an Ultra-Performance Liquid Chromatograph coupled to a triple quadrupole mass spectrometer. Results showed that sorption of PFOS was mainly dependent on pH; sorption decreased as pH increased. Presence of HA increased log K-d from 1.29 to 2.03, 1.76 to 1.92 and 1.51 to 1.96 at pH 5.50-7.50 for 3-/4-/4-PFOS, 6-/2-PFOS and L-PFOS, respectively. Changes in the aqueous chemistry also affected the behaviour of PFOS as the addition of Na2SO4 enhanced the sorption of PFOS. Results showed that L-PFOS was more readily sorbed to goethite at pH < 4.35 both in the presence and in the absence of humic or fulvic acids. At pH > 4.5 the 3-/4-/5-PFOS isomer group was more associated to goethite. Besides electrostatic interactions, which controlled the sorption of PFOS, this study indicate that the presence of dissolved humic substances in the aqueous phase enhances the sorption via hydrophobic mechanisms.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Goethite, Perfluorooctane sulfonate, Sorption, Humic substances, Electrostatic and hydrophobic interactions
National Category
Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-75699 (URN)10.1016/j.chemosphere.2019.05.252 (DOI)000477691500099 ()31340417 (PubMedID)2-s2.0-85067315052 (Scopus ID)
Funder
Knowledge Foundation, 20160019
Available from: 2019-08-14 Created: 2019-08-14 Last updated: 2019-08-14Bibliographically approved
Åhlgren, K., Sjöberg, V. & Bäckström, M. (2018). Leaching of U, V, Ni and Mo from Alum Shale Waste as a Function of Redox and pH - Suggestion for a Leaching method. In: Wolkersdorfer, Ch., Sartz, L., Weber, A., Burgess, J. and Tremblay, G. (Ed.), Mine Water: Risk to Opportunity. Paper presented at 11th ICARD, IMWA, WISA MWD 2018 Conference – Risk to Opportunity, Pretoria, South Africa, 10-14 September, 2018 (pp. 782-787). Pretoria, South Africa: Tshwane University of Technology, II
Open this publication in new window or tab >>Leaching of U, V, Ni and Mo from Alum Shale Waste as a Function of Redox and pH - Suggestion for a Leaching method
2018 (English)In: Mine Water: Risk to Opportunity / [ed] Wolkersdorfer, Ch., Sartz, L., Weber, A., Burgess, J. and Tremblay, G., Pretoria, South Africa: Tshwane University of Technology , 2018, Vol. II, p. 782-787Conference paper, Published paper (Refereed)
Abstract [en]

Alum shale residues in the form of nes and ash were leached at di erent pH and redox conditions. Total concentrations and mineral analysis indicate loss of some elements in burned shale, and redistribution of others. Uranium and nickel were shown to be more leachable from nes than from ashes. Decreased pH favoured leaching of Ni, U and V, whereas increased pH resulted in increased leaching of molybdenum. Redox conditions a ected leaching of Mo and V, but not U and Ni. us the method can be used as an estimate for leaching at di erent redox and pH conditions.

Place, publisher, year, edition, pages
Pretoria, South Africa: Tshwane University of Technology, 2018
Keywords
Kvarntorp, alum shale, leaching, uranium, vanadium
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71961 (URN)978-0-620-80650-3 (ISBN)
Conference
11th ICARD, IMWA, WISA MWD 2018 Conference – Risk to Opportunity, Pretoria, South Africa, 10-14 September, 2018
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Sartz, L., Sädbom, S. & Bäckström, M. (2018). Remediation of Historic Waste Rock by Injection of Green Liquor Dregs: Results From a Field Scale Trial, Gladhammar, Southern Sweden. In: Wolkersdorfer, Ch., Sartz, L., Weber, A., Burgess, J. and Tremblay, G (Ed.), Mine Water: Risk to Opportunity. Paper presented at 11th ICARD | IMWA | WISA MWD 2018 Conference – Risk to Opportunity, Pretoria, South Africa, 10-14 September, 2018 (pp. 1124-1129). Pretoria, South Africa: Tshwane University of Technology, II
Open this publication in new window or tab >>Remediation of Historic Waste Rock by Injection of Green Liquor Dregs: Results From a Field Scale Trial, Gladhammar, Southern Sweden
2018 (English)In: Mine Water: Risk to Opportunity / [ed] Wolkersdorfer, Ch., Sartz, L., Weber, A., Burgess, J. and Tremblay, G, Pretoria, South Africa: Tshwane University of Technology , 2018, Vol. II, p. 1124-1129Conference paper, Published paper (Refereed)
Abstract [en]

Mining in Gladhammar, southern Sweden started in the 15th century, generating waste rock containing copper, cobalt, and arsenic. During remediation (2011) some waste rock was preserved, due to its geoscienti- c value, and placed on a geomembrane surface. Eventually, it became apparent that it had a substantial environmental impact (pH 3.8, Cu 96 mg/L, Co 21 mg/L). In 2017, green liquor dregs was injected in order to increase pH and decrease trace element mobility. Ten months a er injection pH was 8.3 and concentrations of copper and cobalt 1.3 mg/L and 1.1 mg/L, respectively. Evaluation will continue for at least five years.

Place, publisher, year, edition, pages
Pretoria, South Africa: Tshwane University of Technology, 2018
Keywords
Mine waste, alkaline, cobalt, copper, arsenic, pH
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71960 (URN)978-0-620-80650-3 (ISBN)
Conference
11th ICARD | IMWA | WISA MWD 2018 Conference – Risk to Opportunity, Pretoria, South Africa, 10-14 September, 2018
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Sartz, L., Hamilton, I., Macsik, J., Maurice, C., Sädbom, S., Westin, G. & Bäckström, M. (2017). Green Liquor Dregs from Pulp and Paper Industry used in Mine Waste Management: a Symbiosis Project (GLAD) between two Swedish Base Industries. In: Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A (Ed.), Mine Water & Circular Economy: . Paper presented at IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017 (pp. 862-868). Lappeenranta, Finland: Lappeenranta University of Technology, II
Open this publication in new window or tab >>Green Liquor Dregs from Pulp and Paper Industry used in Mine Waste Management: a Symbiosis Project (GLAD) between two Swedish Base Industries
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2017 (English)In: Mine Water & Circular Economy / [ed] Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A, Lappeenranta, Finland: Lappeenranta University of Technology , 2017, Vol. II, p. 862-868Conference paper, Published paper (Refereed)
Abstract [en]

Mining has been and still is an important industry in Sweden. Leaching from sulfidic mining waste is however a serious environmental issue that can bring acidity and metals in solution. Simultaneously, green liquor dreg (GLD) with potential to decrease oxygen transport to the waste and neutralize acid leachate, is generated by the pulp and paper industry and deposited in landfills. The aim of the project is to promote valorisation of GLD, identify hinders and create a database providing information about the material and its variability to enhance establishment of circular economy for the pulp and paper mill waste.

Place, publisher, year, edition, pages
Lappeenranta, Finland: Lappeenranta University of Technology, 2017
Keywords
Waste rock, alkaline by-product, sealing layer, injection
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71959 (URN)978-952-335-065-6 (ISBN)
Conference
IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Bäckström, M., Sartz, L. & Sädbom, S. (2017). Mining Waste as an Exploration Tool and Secondary Resource. In: Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A (Ed.), Mine Water & Circular Economy: . Paper presented at IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017 (pp. 964-971). Lappeenranta, Finland: Lappeenranta University of Technology, II
Open this publication in new window or tab >>Mining Waste as an Exploration Tool and Secondary Resource
2017 (English)In: Mine Water & Circular Economy / [ed] Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A, Lappeenranta, Finland: Lappeenranta University of Technology , 2017, Vol. II, p. 964-971Conference paper, Published paper (Refereed)
Abstract [en]

There is today no overall information about how much mining waste there is in Sweden and what it contains. This project focused on samples from waste rock, tailings and slag from the historical mining region Bergslagen, Sweden. Modern dissolution and analytical methods were used in order to determine approximately 50 elements in the samples. Modern analytical data for the historical mining waste is useful as an exploration tool and can provide information about remaining or new resources underground. Results show that there is a potential for recovery of critical elements from mining waste as well as dealing with environmental problems.

Place, publisher, year, edition, pages
Lappeenranta, Finland: Lappeenranta University of Technology, 2017
Keywords
Tailings, slag, trace elements, environment
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71957 (URN)978-952-335-065-6 (ISBN)
Conference
IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Ekblom, S., Sartz, L. & Bäckström, M. (2017). Treatment of Historical Mining Waste using different Incineration Ashes. In: Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A (Ed.), Mine Water & Circular Economy: . Paper presented at IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017 (pp. 1125-1132). Lappeenranta, Finland: Lappeenranta University of Technology, II
Open this publication in new window or tab >>Treatment of Historical Mining Waste using different Incineration Ashes
2017 (English)In: Mine Water & Circular Economy / [ed] Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A, Lappeenranta, Finland: Lappeenranta University of Technology , 2017, Vol. II, p. 1125-1132Conference paper, Published paper (Refereed)
Abstract [en]

ARD from historical mining sites in Sweden is a major source for trace elements to surface waters. In order to be able to treat a large portion of these sites cost effective reclamation methods is necessary. Incineration ashes were used in leaching tests to study their effect on a highly weathered mining waste in order to neutralize acidity and immobilize trace elements. This study shows that ashes can be used to increase pH and decrease trace element mobility from oxidized mining waste. Increased leaching of Cl, Mo and Sb, however, needs to be considered for waste fuel ashes before use.

Place, publisher, year, edition, pages
Lappeenranta, Finland: Lappeenranta University of Technology, 2017
Keywords
Antimony, molybdenum, chloride, leaching
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71958 (URN)978-952-335-065-6 (ISBN)
Conference
IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Åhlgren, K., Sjöberg, V., Sartz, L. & Bäckström, M. (2017). Understanding Groundwater composition at Kvarntorp, Sweden, from leaching tests and multivariate statistics. In: Wolkersdorfer, C.; Sartz, L.; Sillanpää, M.; Häkkinen, A. (Ed.), 13th International Mine Water Association Congress – Mine Water & Circular Economy: Proceedings, Volume 2. Paper presented at 13th International Mine Water Association Congress – "Mine Water & Circular Economy – A Green Congress" (IMWA 2017), Rauha, Lappeenranta, Finland, June 25-30, 2017 (pp. 770-776). International Mine Water Association
Open this publication in new window or tab >>Understanding Groundwater composition at Kvarntorp, Sweden, from leaching tests and multivariate statistics
2017 (English)In: 13th International Mine Water Association Congress – Mine Water & Circular Economy: Proceedings, Volume 2 / [ed] Wolkersdorfer, C.; Sartz, L.; Sillanpää, M.; Häkkinen, A., International Mine Water Association , 2017, p. 770-776Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Due to oil production from alum shale, the Kvarntorp area is heavily polluted. A waste deposit consisting mostly of shale ash and fines is of important concern. Groundwater shows that parameters such as pH, U, V, Ni and Mo are different at different localities around the deposit. Leaching tests indicate that burned and unburned shale residues leave different signatures on leachates. Principal component analysis of groundwater and leaching tests suggest that ground-water is affected by the waste deposit and that it is more influenced by shale ash than by fines.

Place, publisher, year, edition, pages
International Mine Water Association, 2017
Series
Tutkimusraportit – Research Reports, ISSN 2243-3376 ; 3
Keywords
Alum shale, Kvarntorp, Shale oil, Leaching, Uranium
National Category
Environmental Sciences
Identifiers
urn:nbn:se:oru:diva-64732 (URN)978-952-335-065-6 (ISBN)978-952-335-066-3 (ISBN)
Conference
13th International Mine Water Association Congress – "Mine Water & Circular Economy – A Green Congress" (IMWA 2017), Rauha, Lappeenranta, Finland, June 25-30, 2017
Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2019-03-26Bibliographically approved
Åhlgren, K., Sjöberg, V., Sartz, L. & Bäckström, M. (2017). Understanding Groundwater Composition at Kvarntorp, Sweden, from Leaching Tests and Multivariate Statistics. In: Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A (Ed.), Mine Water & Circular Economy: . Paper presented at IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017 (pp. 770-776). Lappeenranta, Finland: Lappeenranta University of Technology, II
Open this publication in new window or tab >>Understanding Groundwater Composition at Kvarntorp, Sweden, from Leaching Tests and Multivariate Statistics
2017 (English)In: Mine Water & Circular Economy / [ed] Wolkersdorfer, C., Sartz, L., Sillanpää, M. and Häkkinen, A, Lappeenranta, Finland: Lappeenranta University of Technology , 2017, Vol. II, p. 770-776Conference paper, Published paper (Refereed)
Abstract [en]

Due to oil production from alum shale, the Kvarntorp area is heavily polluted. A waste deposit consisting mostly of shale ash and fines is of important concern. Groundwater shows that parameters such as pH, U, V, Ni and Mo are different at different localities around the deposit. Leaching tests indicate that burned and unburned shale residues leave different signatures on leachates. Principal component analysis of groundwater and leaching tests suggest that ground-water is affected by the waste deposit and that it is more influenced by shale ash than by fines.

Place, publisher, year, edition, pages
Lappeenranta, Finland: Lappeenranta University of Technology, 2017
Keywords
Alum shale, Kvarntorp, Shale oil, Leaching, Uranium
National Category
Geochemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-71956 (URN)978-952-335-065-6 (ISBN)
Conference
IMWA 2017, Mine Water & Circular Economy, 13th International Mine Water Association Congress, Lappeenranta, Finland, 25-30 June, 2017
Available from: 2019-01-30 Created: 2019-01-30 Last updated: 2019-03-26Bibliographically approved
Saqib, N. & Bäckström, M. (2016). Chemical association and mobility of trace elements in 13 different fuel incineration bottom ashes. Fuel, 172, 105-117
Open this publication in new window or tab >>Chemical association and mobility of trace elements in 13 different fuel incineration bottom ashes
2016 (English)In: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 172, p. 105-117Article in journal (Refereed) Published
Abstract [en]

The release of trace elements from waste incineration bottom ash is problematic during utilization/landfilling. Thirteen bottom ashes (from various waste fuels and wooden/mixed wooden fuel) were investigated with respect to the total content, leaching behaviour by standard leaching procedure (EN 12457-3), and chemical association of trace elements by sequential extraction. Results showed that the content of trace elements in household/or industrial waste bottom ashes were of high level in comparison to in wooden/mixed wooden fuel/mixed wooden waste ashes. Type of fuel being treated greatly impacts the total inventory of trace elements. On average, trace element content in 13 ashes followed the decreasing order; Cu > Zn > Pb > Cr > Ni > Sb > As. In this study the average total content of Zn, Pb, Cu and Cr was higher in grate bottom ash treating household/industrial waste in comparison to fluidized boilers ash using same waste, however, there were too few data points and variation in data was large. By Standard leaching procedure, an excessive amount (more than disposal limit) of leached Cr, Pb, Sb and Cu (mostly in household/industrial waste ash) was observed in 6, 5, 5 and 4 of the 13 samples, respectively. Correlation coefficients (r) found between total and water leachable contents for Cu, Sb and As were 0.8, 0.7 and 0.6 respectively. Sequential extraction indicated that residual was the major fraction mostly, however, considerable amounts of trace elements had the potential to leach out. A large fraction of arsenic (57% based on average values) in 5 samples (mostly in waste/virgin wood and mixed wooden waste/fuel) and Zn (49% based on average values) in 4 of 13 samples (mostly household/or industrial) were found in the fractions that are easily available (acid soluble and exchangeable). Further, a considerable amount of Cu in 4 samples were found associated with the organic-bound phase. Dissolved organic matter might play an important role in leaching of Cu during utilization/landfilling. Moreover, principal component analysis (PCA) showed that fuel type affects the association of trace elements in bottom ash. Amounts of labile trace elements in wooden/mixed wooden fuel/waste bottom ashes were comparatively lower than other fuel bottom ashes. None of the samples exceeded the limit of disposal with respect to DOC leaching while chlorine in two and sulphate in three samples (household/industrial) exceeded limit. LOI (550 °C) values were higher for bottom ash from grate facilities probably due to no-pre-treatment of the waste fuel. While comparatively low values of LOI (1 000 °C) in few samples implies that the oxidation might have outweighed the loss of carbonates.

Place, publisher, year, edition, pages
Elsevier, 2016
Keywords
Bottom ash; Speciation; Trace elements; Incineration; Mobility
National Category
Inorganic Chemistry
Research subject
Chemistry
Identifiers
urn:nbn:se:oru:diva-47348 (URN)10.1016/j.fuel.2016.01.010 (DOI)000368881200013 ()2-s2.0-84954326717 (Scopus ID)
Note

Funding Agency:

Varmeforsk (Thermal Engineering Research Association)

Available from: 2016-01-07 Created: 2016-01-07 Last updated: 2017-12-01Bibliographically approved
Sartz, L. & Bäckström, M. (2016). Development of a low-tech treatment for neutral mine water: a case study. In: Drebenstedt, C. & Paul, M. (Ed.), Mining Meets Water: Conflicts and Solutions. Paper presented at Annual Meeting of the International-Mine-Water-Association (IMWA 2016), Leipzig, Germany, July 11-15, 2016 (pp. 913-918). Freiberg, Germany: TU Bergakademie Freiberg, Institute of Mining and Special Civil Engineering
Open this publication in new window or tab >>Development of a low-tech treatment for neutral mine water: a case study
2016 (English)In: Mining Meets Water: Conflicts and Solutions / [ed] Drebenstedt, C. & Paul, M., Freiberg, Germany: TU Bergakademie Freiberg, Institute of Mining and Special Civil Engineering , 2016, p. 913-918Conference paper, Published paper (Refereed)
Abstract [en]

Lovisagruvan is a Pb-Zn-Ag mine in mid-south Sweden, with a yearly production of some 40 000 tons. There are four main levels in the mine: 55, 105, 145 and 190 m below ground. Water is continously pumped at a rate of 5 m3/h, passing sedimentation pools at each of the four main levels in the mine and finally one above ground. A modified backfill mining is used and in order to visually separate the ore from the waste rock limestone is used as a separating layer. Limestone addition in combination with non-acid producing mineralisation generates a pH-neutral mine water. For many years the mine has had problems with high levels of zinc and lead in the mine water released to recipient. The primary contaminants, lead and zinc, were mainly found as particles or associated to particles. With a combination of several measures including a sandfilter and FeSO4 addition suspended matter was reduced 93 %, lead 91 % and zinc 71 %.

Place, publisher, year, edition, pages
Freiberg, Germany: TU Bergakademie Freiberg, Institute of Mining and Special Civil Engineering, 2016
Keywords
Sand filter, sedimentation, iron hydroxides, lead, zinc
National Category
Environmental Sciences
Research subject
Enviromental Science
Identifiers
urn:nbn:se:oru:diva-58803 (URN)000402663400142 ()978-3-86012-533-5 (ISBN)
Conference
Annual Meeting of the International-Mine-Water-Association (IMWA 2016), Leipzig, Germany, July 11-15, 2016
Available from: 2017-07-26 Created: 2017-07-26 Last updated: 2019-03-26Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0002-2674-4994

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