DISTRIBUTION OF IRON AND IRON COMPOUNDS IN THE KEMERI - JAUNKEMERI OCCURENCE OF SULPHIDE WATER

Environment Technology Resources Proceedings of the International Scientific and Practical Conference ◽

10.17770/etr2015vol2.243 ◽

2015 ◽

Vol 2 ◽

Author(s):

Janis Prols

Keyword(s):

Organic Matter ◽

Groundwater Modeling ◽

Organic Matter Content ◽

Matter Content ◽

Iron Compounds ◽

Migration Forms ◽

Oxidation Reduction ◽

Oxidation Reduction Potential ◽

And Migration ◽

Formation Of Complexes

Iron concentrations, distribution and migration forms, depending on pH and oxidation – reduction potential, were analyzed in case of the Kemeri-Jaunkemeri occurrence (area about 240 km2) of sulphide containing water (maximal sulphides concentration – 74 mg/l), located in Latvia. Iron content was investigated in 457 wells located within all area of occurrence. Those wells were installed to two aquifers: the Quarternary multi-aquifer and Salaspils aquifer, where occurrence of sulphide containing groundwater is distributed. All groundwater of occurrence is classified in four types depending on oxygen, sulphides and organic matter content in the groundwater. Modeling of groundwater migration forms was carried out, and it is stated that iron migrates basically as Fe2+ in oxygen and suphides non-containing water. Migration forms are influenced by concentration of organic matter in the aquifer. The portion of Fe2+ migrating in a form of free decreases due to formation of complexes with fulvic and humic acids, which can reach 36.5% of all migration forms. Iron migrates as Fe(OH)3 in oxygen containing water (more than 99% of determined forms). Presence of iron is ascertained also in sulphides containing water , where iron migrates basically as (98.8% of determined forms). This occurs due to formation of complexes with sulphydes – FeHS- and Fe(HS)2o.

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Distribution of iron and iron compounds in the Kemeri - Jaunkemeri occurence of sulphide water

Environment Technology Resources Proceedings of the International Scientific and Practical Conference ◽

10.17770/etr2015vol2.626 ◽

2015 ◽

Vol 2 ◽

pp. 244

Author(s):

Janis Prols ◽

Ērika Teirumnieka ◽

Edmunds Teirumnieks

Keyword(s):

Organic Matter ◽

Groundwater Modeling ◽

Organic Matter Content ◽

Matter Content ◽

Iron Compounds ◽

Migration Forms ◽

Oxidation Reduction ◽

Oxidation Reduction Potential ◽

And Migration ◽

Formation Of Complexes

Iron concentrations, distribution and migration forms, depending on pH and oxidation – reduction potential, were analyzed in case of the Kemeri-Jaunkemeri occurrence (area about 240 km2) of sulphide containing water (maximal sulphides concentration – 74 mg/l), located in Latvia. Iron content was investigated in 457 wells located within all area of occurrence. Those wells were installed to two aquifers: the Quarternary multi-aquifer and Salaspils aquifer, where occurrence of sulphide containing groundwater is distributed. All groundwater of occurrence is classified in four types depending on oxygen, sulphides and organic matter content in the groundwater. Modeling of groundwater migration forms was carried out, and it is stated that iron migrates basically as Fe2+ in oxygen and suphides non-containing water. Migration forms are influenced by concentration of organic matter in the aquifer. The portion of Fe2+ migrating in a form of free decreases due to formation of complexes with fulvic and humic acids, which can reach 36.5% of all migration forms. Iron migrates as Fe(OH)3 in oxygen containing water (more than 99% of determined forms). Presence of iron is ascertained also in sulphides containing water, where iron migrates basically as (98.8% of determined forms). This occurs due to formation of complexes with sulphydes – FeHS- and Fe(HS)2o.

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Contamination Alters the Physicochemical and Textural Characteristics of Clays in the Sediments of the Peri Urban Reconquista River, Affecting the Associated Indigenous Microorganisms

Minerals ◽

10.3390/min11030242 ◽

2021 ◽

Vol 11 (3) ◽

pp. 242

Author(s):

Ana E. Tufo ◽

Susana Vázquez ◽

Natalia F. Porzionato ◽

María Celeste Grimolizzi ◽

María Belén Prados ◽

...

Keyword(s):

Organic Matter ◽

San Francisco ◽

River Sediments ◽

Clay Fraction ◽

Organic Matter Content ◽

Matter Content ◽

Textural Characteristics ◽

Oxidation Reduction ◽

Textural Characterization ◽

Reconquista River

The physicochemical and textural characteristics of river sediments and, essentially, their clays, are at the center of a network of biological and geochemical factors that are mutually modifying. Therefore, the contamination, the characteristics of the clays, and the associated microorganisms strongly influence each other. In this work, sediments from two sites of the urban Reconquista River, near Buenos Aires City, Argentina, exposed to different environmental contexts were characterized. The huge differences in the organic matter content in the vertical profile between both sediments strongly evidenced the polluted status of San Francisco (SF) site as opposed to the Dique Roggero (DR) site. Thorough physicochemical and textural characterization of the sediments and their clay fraction performed by pH, Oxidation-reduction potential (ORP), spectrophotometry, XRD, laser diffraction, N2 adsorption–desorption isotherms, EDS, and SEM measurements revealed that organic matter (DR: 41 ± 5 g kg−1; SF: 150 ± 30 g kg−1) intervened in the retention of heavy metals (DR: 5.6 mg kg−1 Zn, 7 mg kg−1 Cu, 3.1 kg−1 Cr; SF: 240 mg kg−1 Zn, 60 mg kg−1 Cu, 270 mg kg−1 Cr) and affected the level of association and the formation of mineral–organic aggregates (DR: 15 ± 3 μm; SF: 23 ± 4 μm). This can be decisive in the surface interaction required for the establishment of bacterial assemblages, which determine the biogeochemical processes occurring in sediments and have a key role in the fate of contaminants in situ and in the remediation processes that need to be applied to restore the anoxic contaminated sediments.

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Rare Earth Elements of Ajali Sandstone, SW, Anambra Basin in Nigeria: Implication for Soil Genesis

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v24i11.22 ◽

2021 ◽

Vol 24 (11) ◽

pp. 1999-2004

Author(s):

M Ilevbare

Keyword(s):

Organic Matter ◽

Rare Earth ◽

Soil Organic Matter ◽

Rare Earth Elements ◽

Inductively Coupled Plasma ◽

Organic Matter Content ◽

Matter Content ◽

Fractionation Process ◽

Anambra Basin ◽

And Migration

The Ajali Sandstone, South-western, Anambra Basin, was studied for Rare Earth Elements (REEs), using a Phillips 45 channel Inductively Coupled Plasma (ICP) Emission Spectrometer. The standard deviation of the REEs (Dy, Er, Eu, Y, Yb, La and Nd) averages 3.5 mg/L, 0.34 mg/L, 0.32 mg/L, 3.93 mg/L, 1.96 mg/L, 4.02 mg/L and 2.24 mg/L respectively for each of the sampled locations. The REEs concentrations showed both positive and negative concentration anomalies. The enrichment or depletion of the REEs is generally attributed to their tendency to be incorporated into plagioclase preferentially over other minerals. The Ajali Formation is predominantly sand/sandstone, with clay occurring only as intercalations/thin beds of clay drapes with the increasing particle size of the sand grains, makes the rate of adsorption and distribution of REEs in the soil low, and explains the low values of REEs concentration. Soil organic matter (SOC) plays an important role in the adsorption and migration of REEs in the Ecosystems. The SOC is linearly associated with REEs Concentration as it increases with increasing content of SOC. The Ajali Sandstone studied falls in the vicinity of abandoned cropland to cropland in a lower/gentle slope region, correspondingly low in soil organic matter content and as such slow rate of distribution and migration of REEs concentrations in the Ajali Sandstone. The sesquioxides such as Fe oxides increases as REEs contents increases. The 0.46 mean value of Fe2O3 in the Sandstone of the area studied implies a low REEs adsorption rate and subsequently the very low REEs concentrations of the soils. The istribution of REEs within the Ajali Formation soils were grossly affected by the factors that influenced the adsorption and migration rate of the minerals during magmatic fractionation process, hence the low REEs concentration of the Sediments. Keywords`: Sansdstone, Anambra Basin, Rare Earth Elements, Magmatic fractionation

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Adsorption, Volatility, and Migration of Thiocarbamate Herbicides in Soil

Weed Science ◽

10.1017/s0043174500031209 ◽

1969 ◽

Vol 17 (2) ◽

pp. 148-153 ◽

Cited By ~ 22

Author(s):

Ephraim Koren ◽

Chester L. Foy ◽

Floyd M. Ashton

Keyword(s):

Organic Matter ◽

Organic Matter Content ◽

Lateral Diffusion ◽

Bentonite Clay ◽

Clay Content ◽

Matter Content ◽

Vapor Pressures ◽

Regression Test ◽

And Migration ◽

Relative Adsorption

The relative adsorption and migration of four thiocarbamate herbicides were studied in five soil types. Pebulate (S-propylbutylethylthiocarbamate) was adsorbed to the greatest degree by any one of the soils or adsorbents used. EPTC (ethyl N-N-dipropylthiocarbamate) showed the least adsorption while ethyl N-ethyl-N-cyclohexylthiocarbamate (hereinafter referred to as R-2063) was intermediate. Charcoal and bentonite clay were very effective adsorbents while the soils varied in their ability to adsorb the herbicides. A correlation was found between the rate of adsorption and the amount of organic matter in the soil. Such correlation was not found with the clay content, but a multiple regression test showed that the clay content is also closely associated with adsorption. The leaching of EPTC, pebulate, R-2063, and S-2,3-dichloroallyl N,N-diisopropylthiolcarbamate (diallate) in soil columns was directly related to their solubilities in water and inversely related to the organic matter content of the soil. Incorporation of the herbicides into the upper 5 cm of the soil did not alter the pattern or depth of their leaching. The lateral diffusion of thiocarbamates in the soil was much more restricted than the leaching downward. Again, this movement was closely related to the water solubilities of the herbicides, to soil organic matter, and apparently to the vapor pressures of the herbicides. EPTC vapor loss was the greatest followed in order by pebulate and R-2063. The rate of vapor loss from soils of all of the herbicides tested was reduced when the soil properties enabled rapid infiltration and drying of the spray drops.

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Forecasting of H2S build-up in a reclaimedwastewater pipe

Water Science & Technology ◽

10.2166/wst.1998.0407 ◽

1998 ◽

Vol 38 (10) ◽

pp. 241-248 ◽

Cited By ~ 7

Author(s):

S. Elmaleh ◽

S. Delgado ◽

M. Alvarez ◽

L. E. Rodríguez-Gómez ◽

E. Aguiar

Keyword(s):

Organic Matter Content ◽

Field Studies ◽

Matter Content ◽

Urban Wastewater ◽

Reclaimed Wastewater ◽

Oxidation Reduction ◽

Oxidation Reduction Potential ◽

Average Water ◽

Kinetics Of ◽

Raw Wastewater

The present study has been carried out in a completely filled gravity pipe, 61 km long, which transports reclaimed urban wastewater (RUWW), for crop irrigation in the island of Tenerife (Spain), at an average water velocity of 0.4 m/s. Due to the long residence time of the reclaimed wastewater in the pipe (40 hours), anaerobic conditions usually appear, and chemical transformation of reclaimed wastewater occurs during transportation, especially sulfide generation. Field studies have been conducted from November 1994 to January 1997. The variation in sulfide and oxidation-reduction potential (ORP) among other parameters during wastewater transportation have been reported. The object of this work is to study the kinetics of the sulfide generation in a full scale reclaimed wastewater pipe, in order to obtain a forecasting equation of sulfide generation, and to compare this equation with those previously proposed for raw wastewater sewers. Equations obtained from this research differ quite from those previously proposed for sewers. This can be due to the reclaimed wastewater used in this system, which has a very much lower organic matter content than raw wastewater.

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Cd2+, Cu2+, and Pb2+ sorption, desorption and migration in Fluvisols

Spanish Journal of Soil Science ◽

10.3232/sjss.2015.v5.n3.07 ◽

2015 ◽

Vol 5 ◽

Author(s):

Daniel Arenas-Lago ◽

Andrés Rodríguez-Seijo ◽

Beatriz Cerqueira Cancelo ◽

María Luisa Andrade Couce ◽

Flora Alonso Vega

Keyword(s):

Organic Matter ◽

Organic Matter Content ◽

Matter Content ◽

Competitive Sorption ◽

Retention Capacity ◽

Sorption Hysteresis ◽

Subsurface Waters ◽

And Migration ◽

The Individual ◽

Lower Capacity

The aim of this work was to assess and compare the mono and bimetallic Cd2+, Cu2+ and Pb2+ sorption and desorption capacities as well as the sorption hysteresis in two different types of Fluvisols. The migration of cations through the profiles was evaluated, along with the dependence on soil properties of mono and bimetallic Cd2+, Cu2+ and Pb2+ fixation, hysteresis and mobility. Sorption irreversibility and migration of the studied cations through the profiles were evaluated, by means of hysteresis and migration indexes calculated from retention capacity values (Kr) proposed and validated in a previous work. The results showed that the sorption and retention capacities of the A horizons were higher than those of C and that the individual sorption and retention capacities were greater than the competitive capacities. The highest values of sorption and retention capacities were those for Pb2+, followed by Cu2+ and Cd2+. Mn oxides, organic matter and, consequently, ECEC were the components and properties that most highly influenced Pb2+ monometal and competitive sorption and retention. Cd2+ did not interfere with Pb2+ or Cu2+ sorption and retention. Organic matter content was only correlated with the sorption hysteresis of Pb2+, in accordance with the high Pb2+fixation capacity of in this component and its lower capacity to retain Cu2+ and Cd2+. Tidalic Fluvisols retained only 0.4 and 0.2% of added Cd2+ when competing with Cu2+ and Pb2+, respectively. However, more than 60% of the added Pb2+, and over 47% of the added Cu2+ were retained. The Pb2+ retained in competition with Cu2+ was 98.2 in TF and 47% in the Umbric Fluvisol, whereas the retained Cu2+ was 93.8 and 29.9% respectively. These retention and Cd2+ mobility indicated that there is a possibility of heavy metals transferring to subsurface waters and, through these, of contamination and even of these metals entering the food chain.

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HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2018-3-46-54 ◽

2018 ◽

pp. 46-54

Author(s):

O. A. Lipatnikova

Keyword(s):

Heavy Metal ◽

Organic Matter ◽

Bottom Sediments ◽

Metal Speciation ◽

Organic Matter Content ◽

Water Reservoir ◽

Matter Content ◽

Heavy Metal Speciation ◽

Mobile Forms ◽

Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

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Changes in organic matter content of soil as a result of long-term fertilization

Cereal Research Communications ◽

10.1556/crc.33.2005.1.12 ◽

2005 ◽

Vol 33 (1) ◽

pp. 53-55

Author(s):

Katalin Berecz ◽

Katalin Debreczeni

Keyword(s):

Organic Matter ◽

Organic Matter Content ◽

Matter Content

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Physico-Chemical Properties of Soil Collected from Chandrabhaga River in Kalmeshwar, Nagpur, Maharashtra

Journal of Advanced Research in Alternative Energy Environment and Ecology ◽

10.24321/2455.3093.202006 ◽

2020 ◽

Vol 07 (02) ◽

pp. 1-3

Author(s):

Amita M Watkar ◽

Keyword(s):

Organic Matter ◽

Soil Quality ◽

Agricultural Land ◽

Organic Matter Content ◽

Chemical Properties ◽

Matter Content ◽

Soil Attributes ◽

Essential Components ◽

Agricultural Land Management ◽

Physical And Chemical

Soil, itself means Soul of Infinite Life. Soil is the naturally occurring unconsolidated or loose covering on the earth’s surface. Physical properties depend upon the amount, size, shape, arrangement, and mineral composition of soil particles. It also depends on the organic matter content and pore spaces. Chemical properties depend on the Inorganic and organic matter present in the soil. Soils are the essential components of the environment and foundation resources for nearly all types of land use, besides being the most important component of sustainable agriculture. Therefore, assessment of soil quality and its direction of change with time is an ideal and primary indicator of sustainable agricultural land management. Soil quality indicators refer to measurable soil attributes that influence the capacity of a soil to function, within the limits imposed by the ecosystem, to preserve biological productivity and environmental quality and promote plant, animal and human health. The present study is to assess these soil attributes such as physical and chemical properties season-wise.

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