Natural organic matter from the dispersion train of gold sulfide tailings: group composition and fractionation of elements: case study of Ursk tailings, Kemerovo region, Siberia

2020 ◽  
pp. geochem2020-052
Author(s):  
I.N. Myagkaya ◽  
B.Yu. Saryg-ool ◽  
Oleg N. Surkov ◽  
S.M. Zhmodik ◽  
E.V. Lazareva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Humic Acids ◽  
Toxic Elements ◽  
Group Composition ◽  
Soluble Fraction ◽  
Potentially Toxic Elements ◽  
Water Soluble ◽  
Water Soluble Fraction ◽  
Sulfide Tailings

We study the contents of elements and group composition in natural organic matter (NOM) that interacts with acid mine drainage (АMD) and high-sulfide tailings at the Ursk site (Southwestern Siberia, Russia). AMD causes biomass changes in NOM, related changes in the composition of fractions, and hydrolysis of hydrolyzable compounds; it increases the water-soluble fraction and maintains depolymerization of humic acids to fulvic acids, but exerts no effect on substances soluble in organics (bitumen) and on poorly hydrolyzable compounds. Accumulation of inorganic elements and precipitation of minerals obscure the true fraction composition of NOM: the superposed mineral component contributes significantly to the water-soluble, humic acid, hydrolyzable, and non-hydrolyzable fractions, and may reach 26.4 % per total of all fractions. Rock-forming and potentially toxic elements partition among NOM fractions and predominate in the water-soluble fraction. The contents of Au and Ag are the highest in the fractions of humic acids and hydrolyzable compounds but are lower in the non-hydrolyzable residue. The obtained data have implications for possible migration of potentially toxic elements and noble metals and thus for remediation of polluted areas. The observed fractionation of Ag and Au in NOM helps understand the mechanisms of their distribution in organic-bearing environments, such as peatlands or coal basins.

Water-soluble fraction of mercury, arsenic and other potentially toxic elements in highly contaminated sediments and soils

Chemosphere ◽  
2010 ◽  
Vol 78 (11) ◽  
pp. 1301-1312 ◽  
Author(s):  
S.M. Rodrigues ◽  
B. Henriques ◽  
J. Coimbra ◽  
E. Ferreira da Silva ◽  
M.E. Pereira ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Soluble Fraction ◽  
Contaminated Sediments ◽  
Potentially Toxic Elements ◽  
Water Soluble ◽  
Water Soluble Fraction

Redistribution and speciation of elements in gold-bearing sulfide mine tailings interbedded with natural organic matter: case study of Novo-Ursk deposit, Kemerovo Region, Siberia

2019 ◽  
Vol 20 (3) ◽  
pp. 323-336
Author(s):  
Bagai-ool Yu Saryg-ool ◽  
I. N. Myagkaya ◽  
I. S. Kirichenko ◽  
M. A. Gustaytis ◽  
O. V. Shuvaeva ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Organic Material ◽  
Toxic Elements ◽  
Mine Drainage ◽  
Potentially Toxic Elements ◽  
Water Soluble ◽  
New Mineral ◽  
Secondary Enrichment ◽  
Gold Bearing

The paper presents data on two cores from the dispersion train of gold-bearing sulfide tailings in the Novo-Ursk deposit (Kemerovo region, Russia), where organic-bearing mud and natural organic matter are interbedded with cyanide tailings and acid mine drainage (AMD). The study focuses on speciation of Au, Ag and potentially toxic elements (PTE), including Fe, Cu, Zn, As, Se and Pb according to selective sequential extractions. Since large contents of elements are found in water solution and bound to Fe(III) compounds, sulfides and/or organic matter in both cores, the organic material behaves as a natural biogeochemical barrier for potentially toxic elements and precious metals released from AMD. The interaction with organic matter results in biogeochemical sorption and immobilization of elements and is favourable for secondary enrichment in gold and silver. It leads to immobilization of elements that further form new mineral phases or become partitioned between existing phases. On the other hand, very high concentrations of water-soluble and oxidizable species of PTE and Au, which are unstable in surface conditions and may become remobilized when the environment changes, make the organic material less workable and even potentially hazardous. Thus, both positive (secondary enrichment) and negative (pollution) effects should be taken into account in the planning and design of systems for purification, disposal of cyanide tailings and recovery of useful components from tailings using natural organic matter as a geochemical barrier.

Mobility of potentially toxic elements in family garden soils of the Riotinto mining area

2021 ◽  
Author(s):  
Antonio Romero-Baena ◽  
Cinta Barba-Brioso ◽  
Alicia Ross ◽  
Isabel González
Keyword(s):  
Organic Matter ◽  
Toxic Elements ◽  
Agricultural Soils ◽  
Clay Mineralogy ◽  
Mining Area ◽  
Potentially Toxic Elements ◽  
Water Soluble ◽  
Trophic Chain ◽  
Mining Areas ◽  
Total Concentrations

<p>Agricultural soils in mining areas usually accumulate potentially toxic elements (PTEs) that can become a health risk to humans by entering the trophic chain. In this study, five small agricultural plots close to Riotinto mines (SW Spain) were studied, with the aims of comparing the concentration of PTEs with respect to the regional (South Portuguese Zone) baseline and conducting availability studies in order to determine the contamination of soils. Chemical composition, total and clay mineralogy, and edaphic parameters were determined in topsoil and subsoil samples to characterize the soils, and single extractions were conducted to assess the mobility. The mineralogy of the soils was composed of quartz and phyllosilicates, with small amounts of feldspars and occasionally containing hematite and calcite. The texture ranged from sandy to silty loam, the pH was slightly acidic, and high contents of organic matter were found. Total concentrations of trace elements correlated with the texture, the content in iron oxy-hydroxides and the pH. The values of As, Pb, Cu, and Zn exceeded the regional baseline even in sites unaffected by mining. The results suggest that a widespread sampling is necessary to determine the local background. The most water-soluble element was As, due to the competition of organic matter for sorption sites. The content of Cu, Cr and Zn extracted with different methods were higher in sandy soils with low iron oxy-hydroxides content. Monoammonium phosphate and EDTA extractions seemed to remove elements from organic matter and iron oxy-hydroxides. The extracted fractions of As and metals reached up to 10-30 wt%.  Despite the high total concentrations of the element in soils, they generally showed low available proportions, especially with water and ammonium acetate extractants. The results suggest that the soils are not necessarily a risk to humans and higher investigation efforts are necessary to assess the availability of PTEs and their transfer to plants.</p>

scholarly journals Water uptake by fresh Indonesian peat burning particles is limited by water-soluble organic matter

2017 ◽  
Vol 17 (18) ◽  
pp. 11591-11604 ◽  
Author(s):  
Jing Chen ◽  
Sri Hapsari Budisulistiorini ◽  
Masayuki Itoh ◽  
Wen-Chien Lee ◽  
Takuma Miyakawa ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Uptake ◽  
Soluble Fraction ◽  
Water Soluble ◽  
Accurate Estimation ◽  
Soluble Organic Matter ◽  
Water Soluble Fraction ◽  
Hygroscopic Properties ◽  
Water Soluble Organic Carbon ◽  
Soluble Organic Carbon

Abstract. The relationship between hygroscopic properties and chemical characteristics of Indonesian biomass burning (BB) particles, which are dominantly generated from peatland fires, was investigated using a humidified tandem differential mobility analyzer. In addition to peat, acacia (a popular species at plantation) and fern (a pioneering species after disturbance by fire) were used for experiments. Fresh Indonesian peat burning particles are almost non-hygroscopic (mean hygroscopicity parameter, κ < 0.06) due to predominant contribution of water-insoluble organics. The range of κ spans from 0.02 to 0.04 (dry diameter = 100 nm, hereinafter) for Riau peat burning particles, while that for Central Kalimantan ranges from 0.05 to 0.06. Fern combustion particles are more hygroscopic (κ = 0. 08), whereas the acacia burning particles have a mediate κ value (0.04). These results suggest that κ is significantly dependent on biomass types. This variance in κ is partially determined by fractions of water-soluble organic carbon (WSOC), as demonstrated by a correlation analysis (R = 0.65). κ of water-soluble organic matter is also quantified, incorporating the 1-octanol–water partitioning method. κ values for the water extracts are high, especially for peat burning particles (A0 (a whole part of the water-soluble fraction): κ = 0.18, A1 (highly water-soluble fraction): κ = 0.30). This result stresses the importance of both the WSOC fraction and κ of the water-soluble fraction in determining the hygroscopicity of organic aerosol particles. Values of κ correlate positively (R = 0.89) with the fraction of m∕z 44 ion signal quantified using a mass spectrometric technique, demonstrating the importance of highly oxygenated organic compounds to the water uptake by Indonesian BB particles. These results provide an experimentally validated reference for hygroscopicity of organics-dominated particles, thus contributing to more accurate estimation of environmental and climatic impacts driven by Indonesian BB particles on both regional and global scales.

scholarly journals High time-resolution chemical characterization of the water-soluble fraction of ambient aerosols with PILS-TOC-IC and AMS

2010 ◽  
Vol 3 (4) ◽  
pp. 1063-1074 ◽  
Author(s):  
H. Timonen ◽  
M. Aurela ◽  
S. Carbone ◽  
K. Saarnio ◽  
S. Saarikoski ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Time Resolution ◽  
Soluble Fraction ◽  
Water Soluble ◽  
High Time ◽  
High Time Resolution ◽  
Water Soluble Fraction ◽  
Soluble Ions ◽  
Water Soluble Ions

Abstract. A particle-into-liquid sampler (PILS) was coupled with a total organic carbon analyzer (TOC) and two ion chromatographs (IC) to enable high time-resolution measurements of water-soluble ions and water-soluble organic carbon (WSOC) by a single sampling and analytical set-up. The new high time-resolution measurement system, the PILS-TOC-IC, was able to provide essential chemical and physical information about fast changes in composition, concentrations and likely sources of the water-soluble fraction of atmospheric aerosol. The concentrations of major water-soluble ions and WSOC were measured by the PILS-TOC-IC system from 25 April to 28 May 2009. The data of the PILS-TOC-IC setup was compared with the data from the High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) data measured from 25 April to 8 May 2009. The measured water-soluble particulate organic matter (WSPOM) concentration varied typically from 0.10 to 8.8 μg m−3 (on average 1.5 μg m−3). The WSPOM contributed on average 51% to particulate organic matter (POM) measured with the AMS. The correlation between the data of all the online measurement devices (AMS, PILS-TOC-IC, semicontinuous EC/OC carbon analyzer and TEOM) was excellent. For sulfate, nitrate and ammonium the correlations between the PILS-TOC-IC and AMS were 0.93, 0.96 and 0.96, respectively. The correlation between WSPOM and POM was also strong (r = 0.88). The identified sources of WSPOM were long-range transported biomass burning and secondary organic aerosol (SOA) formation. WSPOM and oxalate produced in biomass burning were clearly correlated with carbon monoxide.

scholarly journals High time-resolution chemical characterization of the water-soluble fraction of ambient aerosols with PILS-TOC-IC and AMS

2010 ◽  
Vol 3 (2) ◽  
pp. 1775-1805 ◽  
Author(s):  
H. Timonen ◽  
M. Aurela ◽  
S. Carbone ◽  
K. Saarnio ◽  
S. Saarikoski ◽  
...  
Keyword(s):  
Organic Matter ◽  
Biomass Burning ◽  
Time Resolution ◽  
Soluble Fraction ◽  
Water Soluble ◽  
High Time ◽  
High Time Resolution ◽  
Water Soluble Fraction ◽  
Soluble Ions ◽  
Water Soluble Ions

Abstract. A particle-into-liquid sampler (PILS) was coupled with a total organic carbon analyzer (TOC) and two ion chromatographs (IC) to enable high time-resolution measurements of water-soluble ions and water-soluble organic carbon (WSOC) by a single sampling and analytical set-up. The new high time-resolution measurement system, the PILS-TOC-IC, was able to provide essential chemical and physical information about fast changes in composition, concentrations and likely sources of the water-soluble fraction of atmospheric aerosol. The concentrations of major water-soluble ions and WSOC were measured by the PILS-TOC-IC system from 25 April to 28 May 2009. The data of the PILS-TOC-IC setup was completed with the data from the High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) data measured from 25 April to 8 May 2009. The measured water-soluble particulate organic matter (WSPOM) concentration varied typically from 0.10 to 8.8 µg m−3 (on average 1.5 µg m−3). The WSPOM contributed on average 51% to particulate organic matter (POM) measured with the AMS. The correlation between the data of all the online measurement devices (AMS, PILS-TOC-IC, semicontinous EC/OC carbon analyzer and TEOM) was excellent. For sulfate, nitrate and ammonium the correlations between the PILS-TOC-IC and AMS were 0.93, 0.96 and 0.96, respectively. The correlation between WSPOM and POM was also strong (r=0.88). The identified sources of WSPOM were long-range transported biomass burning and secondary organic aerosol (SOA) formation. The WSPOM/POM-ratio followed the trends of the ambient daytime temperature. The temperature dependency of the WSPOM/POM-ratio suggest that in the absence of emissions from biomass burning, the SOA formation was the prevailing source for WSPOM. WSPOM produced in biomass burning was clearly correlated with carbon monoxide, confirming that biomass burning was producing primary WSPOM. In addition, elevated oxalate and potassium concentrations were measured during the biomass burning episode.

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