Conditions and processes of precipitation of iron compounds upon discharge of high-mineralized artesian water from artesian borehole R-30, Staro Oryahovo, Bulgaria

2021 ◽  
Author(s):  
Aleksey Benderev ◽  
Mila Trayanova ◽  
Mihail Tarassov ◽  
Eugenia Tarassova
Keyword(s):  
Iron Compounds ◽  
Artesian Water

ELNES of Iron Compounds

1990 ◽  
Vol 48 (2) ◽  
pp. 28-29
Author(s):  
Hiroki Kurata ◽  
Kazuhiro Nagai ◽  
Seiji Isoda ◽  
Takashi Kobayashi
Keyword(s):  
Energy Loss ◽  
Metal Ions ◽  
Energy Resolution ◽  
Transition Metal Oxides ◽  
Local Symmetry ◽  
Iron Compounds ◽  
Fine Structures ◽  
Electron Energy Loss ◽  
Fe Ions ◽  
Electron Energy Loss Spectra

Electron energy loss spectra of transition metal oxides, which show various fine structures in inner shell edges, have been extensively studied. These structures and their positions are related to the oxidation state of metal ions. In this sence an influence of anions coordinated with the metal ions is very interesting. In the present work, we have investigated the energy loss near-edge structures (ELNES) of some iron compounds, i.e. oxides, chlorides, fluorides and potassium cyanides. In these compounds, Fe ions (Fe2+ or Fe3+) are octahedrally surrounded by six ligand anions and this means that the local symmetry around each iron is almost isotropic.EELS spectra were obtained using a JEM-2000FX with a Gatan Model-666 PEELS. The energy resolution was about leV which was mainly due to the energy spread of LaB6 -filament. The threshole energies of each edges were measured using a voltage scan module which was calibrated by setting the Ni L3 peak in NiO to an energy value of 853 eV.

Anaerobic Digestion of Primary Sludge Containing Iron Phosphate

1973 ◽  
Vol 8 (1) ◽  
pp. 91-109 ◽  
Author(s):  
M.E. Jack ◽  
G.J. Farquhar ◽  
G.M. Cornwall
Keyword(s):  
Anaerobic Digestion ◽  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Iron Phosphate ◽  
Chemical Precipitation ◽  
Task Group ◽  
Iron Compounds ◽  
Primary Sludge ◽  
Group Report ◽  
Aluminum Compounds

Abstract The importance of phosphorus as a nutrient in the eutrophication of lakes and rivers has been well established (Fruh 1967). It has been shown in addition that a significant amount of this phosphorus arises from the discharge of treated and untreated municipal wastewater (Task Group Report 1967). Consequently, measures are being taken, notably in the Province of Ontario, for removal of phosphorus from wastewater by means of chemical precipitation. Chemicals exhibiting satisfactory phosphorus removal include lime, iron compounds and aluminum compounds (Leckie and Stumm 1970; Schmid 1968; Wuhrman 1968).

RECONSTRUCTION OF ARTESIAN WATER IN THE MANOR OF A. K. TOLSTOY

2019 ◽  
Vol 22 (6) ◽  
pp. 51-60
Author(s):  
S. A. Akhremenko ◽  
M. S. Pytskaya
Keyword(s):  
Economic Development ◽  
Cultural Heritage ◽  
Architectural Style ◽  
Project Proposal ◽  
Field Surveys ◽  
Current State ◽  
Artesian Water ◽  
Effective Use ◽  
The Village ◽  
Cultural Monuments

Currently, the issue of preservation and effective use of cultural heritage is relevant. Bryansk region has a significant number of valuable historical and cultural monuments. Almost every district is rich in unique places of interest, a special place among which is occupied by the estate. Within the framework of the concept of landscaping of the estate of Alexei Konstantinovich Tolstoy in the village of Krasny Rog, Pochepsky district, Bryansk region, together with the company "Bryanskpromburvod" were carried out field surveys, engineering-geological, hydrological surveys and other necessary activities in order to compile a pre-project proposal for the reconstruction of the source of artesian water, taking into account archival and bibliographic materials, with minor changes in view of the current state of the territory of the object of cultural heritage. Taking into account engineering-geological and hydrological researches, results of full-scale inspection of the territory, the technology of drilling of a well, necessary materials and the equipment for its arrangement is picked up. The article considers the issue of attracting tourists and vacationers to the source of artesian water in the estate of Alexei Konstantinovich Tolstoy. Above the source it is recommended to install a pump room for the release of water, in order to protect it from pollution, and perform it in the architectural style corresponding to the period of life of Alexei Konstantinovich Tolstoy in the estate. Historical and cultural heritage can act not only as a factor in the development of spiritual life, but also as one of the promising areas of economic development in the Bryansk region. The attractiveness of the Museum-estate increases the tourist attendance, and part of the funds can be used for the maintenance of cultural heritage.

scholarly journals Peculiarities of purification of natural water from iron compounds using ceramic membranes

2021 ◽  
Vol 815 (1) ◽  
pp. 012020
Author(s):  
O V Yarovaya ◽  
Yu M Averina ◽  
N A Bogatov ◽  
A A Razvodova
Keyword(s):  
Natural Water ◽  
Ceramic Membranes ◽  
Iron Compounds

scholarly journals Removing Iron and Organic Substances from Water over the Course of Its Treatment with the Application of Average and Highly Alkaline Polyaluminium Chlorides

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1367
Author(s):  
Izabela Krupińska
Keyword(s):  
Water Treatment ◽  
Human Consumption ◽  
Iron Ions ◽  
Organic Substances ◽  
Iron Compounds ◽  
Polyaluminum Chloride ◽  
Coagulation Process ◽  
Lack Of Information ◽  
Organic Complexes ◽  
Polyaluminium Chloride

In topic-related literature pertaining to the treatment of water, there is a lack of information on the influence of iron ions in highly basic polyaluminum chlorides on the efficiency of purifying water with increased contents of organic substance. The aim of this work was to determine the changes in the content of organic substances as well as iron compounds in water intended for human consumption following unit treatment processes with particular attention paid to the coagulation process. As coagulants, polyaluminium chloride PAXXL10 with an alkalinity of 70%, as well as polyaluminium chloride PAXXL1911 with an alkalinity of 85% the composition of which also contained iron, were tested. The analysis of the obtained results showed that iron compounds and organic substances were removed to the greatest extent by the coagulation process, which also had a significant influence on the final efficiency of water treatment. The effectiveness of water treatment was determined by the type of tested polyaluminum chloride, which influenced the formation of iron-organic complexes. The reason behind the formation of colored iron-organic complexes during coagulation using PAXXL1911 coagulant was the high pH (approx. 8), at which the functional groups of organic substances, due to their dissociation, are more reactive in relation to iron, and possibly the fact of introducing additional iron ions along with the coagulant.

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