Experiences With New Neutralization Technologies for Remediation After ISL Mining of Uranium in Stráž pod Ralskem

2013 ◽  
Author(s):  
Veronika Sedláková ◽  
Ludvík Kašpar ◽  
Tomáš Týkal
Keyword(s):  
Mother Liquor ◽  
Large Scale ◽  
Filter Cake ◽  
Total Dissolved Solids ◽  
Filter Press ◽  
State Enterprise ◽  
Dissolved Solids ◽  
The Czech Republic ◽  
The Difference ◽  
The Town

A big affection of the rock environment and groundwaters occured during the chemical mining of uranium in the years 1966 to 1996 in the neighbourhood of the town Straz pod Ralskem in the Czech Republic. It is necessary to clean the residual technological solutions (RTS) from the underground. The pH of the solutions in some places is still less than 2 and the concentration of sulphates reachs up to 65 g/l. The remedial activities consist of pumping of the RTS from the ground and reprocessing of the RTS in the surface technologies. The implementation of the new neutralization technologies NDS ML and NDS 10 help us with increasing of the efficiency of the remedial process. The NDS ML technology (“Mother liquor reprocessing station”) started its operation in 2009 and it processes the concentrated technological solution from the evaporation station after the alum crystalization (mother liquor) with the concentration of total dissolved solids up to 250 g/l. The principle is the neutralization of the acid solutions with the aid of the lime milk. The suspension is then filtrated in the filter press, the filter cake is deposited in the tailings pond and the filtrate is injected back into the underground rock environment. The NDS 10 technology (“Neutralization and Decontamination Station NDS 10”) started its operation in 2012 and it works on the same technological principle as the NDS ML station. The difference is that the NDS 10 station can process higher volume (4.4 m3/min) of the RTS with lower concentration of total dissolved solids 20–25 g/l. This poster describes the experiences of the state enterprise DIAMO with putting of these two neutralization technologies into operation and with using of the lime milk neutralization in such a large scale.

Athenian Synoikism of the Fifth Century B.C., or Two Stories of Theseus

1999 ◽  
Vol 46 (2) ◽  
pp. 168-187 ◽  
Author(s):  
Valerij Goušchin
Keyword(s):  
Large Scale ◽  
Fifth Century ◽  
Physical Aspect ◽  
Naval Power ◽  
Delian League ◽  
The Difference ◽  
First Time ◽  
The City ◽  
The Town ◽  
Greek World

On the eve of the Peloponnesian War Athens was a great urban agglomeration. It was almost invulnerable to an enemy. So in 431 B.C. the Athenians began to migrate from the countryside into the city on the advice of Pericles (Thuc. 2.14–16). This recalled to Thucydides the time of Theseus (Thuc. 2.15). S. Hornblower regards this migration as the long-postponed physical synoikism, or synoikism in its physical aspect. He insists on the difference between political and physical synoikism, the former being the political unification of the state and the latter mainly the migration into the city. But the Athenians did not migrate into the city for the first time in 431. At the time of Xerxes' invasion the inhabitants of Attica were to be moved into the city before being evacuated to Salamis and elsewhere, and the invasion made their vulnerability clear to the Athenians. They suffered two evacuations, the devastation of Attica and the substantial destruction of Athens. Through driving back the Persians Athens became the leader of the Delian League and acquired great naval power. The change of Athens' position in the Greek world and the damage caused by the Persians necessitated a major reconstruction of the town. The Athenians began with the town and harbour. They built the walls of the city and of the Piraeus first of all. Beforelong the Piraeus had been built on a large scale. In these years the Athenians remembered Theseus again, and he now gained honour and esteem among all the Athenians.

scholarly journals FORMULASI MINUMAN SERBUK INSTAN MENTIMUN MENGGUNAKAN METODE MIXTURE DESIGN

2021 ◽  
Vol 1 (2) ◽  
pp. 75-92
Author(s):  
Alifia Yolandari
Keyword(s):  
Total Dissolved Solids ◽  
Ash Content ◽  
Mixture Design ◽  
Output Data ◽  
Dissolved Solids ◽  
Physical Test ◽  
The Difference ◽  
Hedonic Quality ◽  
Chemical Testing

Minuman serbuk instan adalah salah satu produk minuman yang berbentuk serbuk, mudah larut dalam air, memiliki waktu rehidrasi yang singkat, praktis dalam penyajian dan memiliki umur simpan yang relatif lebih lama. Mentimun berpotensi untuk diolah menjadi produk berupa minuman serbuk instan. Pembuatan minuman serbuk mentimun dapat ditambahkan bahan lain berupa ekstrak jeruk nipis dan gula pasir. Penelitian ini bertujuan untuk mendapatkan formulasi jus mentimun, gula pasir, ekstrak jeruk nipis yang memberikan mutu minuman serbuk instan terbaik. Penelitian ini menggunakan rancangan Mixture Design untuk mendapatkan 16 formulasi terbaik. Mutu minuman serbuk instan mentimun ditentukan melalui kimia yaitu kadar air dan kadar abu. Mutu fisik yaitu waktu larut, total padatan terlarut, dan stabilitas, serta mutu organoleptik yaitu hedonik dan mutu hedonik terhadap parameter warna, aroma, dan rasa. Hasil penelitian menunjukkan bahwa minuman serbuk instan mentimun fomulasi 14 merupakan formulasi terbaik. Perbedaan jumlah komponen berupa jus mentimun, ekstrak jeruk nipis dan gula pasir berpengaruh terhadap kadar abu, warna, dan aroma. Perbedaan jumlah komponen jus mentimun, jeruk nipis dan gula pasir tidak berpengaruh terhadap kadar air, hedonik (aroma dan rasa), dan mutu hedonik (warna dan rasa). Hasil mutu kimia minuman serbuk instan mentimun memiliki kadar air sebesar 3,03% dan kadar abu sebesar 0,74%. Adapun hasil organoleptik terhadap hedonik warna adalah 3,44 (hijau kekuningan), hedonik aroma sebesar 2,6 (agak kuat) dan hedonik rasa sebesar 3,4 (agak manis).  ABSTRACT: Instant powder drink is powder drink product that is soluble, have a short rehydration time, easily served and have a longer shelf life. Cucumber can be potentially used to make instant powder drink. Manufacturing cucumber instant powder drink can be added by another ingredients like sugar and lime extract. The purpose of this research was to find out the differences of cucumber formulation (cucumber juice, sugar, and lime extract) and the quality of cucumber instant powder drink. This research used mixture design as an experimental method to get the best optimum of 16 formulations. The quality of instant powder drink is determined by chemical testing (moisture and ash), physical test (soluble time, total dissolved solids, and stability), and organoleptic test (hedonic quality test for color, scent, and taste). Hedonic test is used to determine the level of preference panelist for color, scent, and taste. The output data processing that is used in mixture design which are anova, and countour plot. The result shows that the difference of formulation has significantly on ash and hedonic quality of color and scent. The research showed that the instant powder drink with formulation of cucumber juice, susgar, and lime extract that is acceptable is formula that contains 76% of cucumber juice, 6% of lime extract and 18% of sugar. This formula contains 3,03% of moisture content and 0,74% of ash content. Based on the physical test this formula have 18 seconds of soluble time, 4 brix of total dissolved solids, and 11 minutes of stability. Cucumber instant powder drink has yellowish green color (score 3,44), strong scent (score 2,6), and sweetness (score 3,44). Keywords: cucumber, lime, mixture design

Relationship between total plasma homocysteine and the risk of aneurysms – a meta-analysis

VASA ◽  
2020 ◽  
pp. 1-6
Author(s):  
Hanji Zhang ◽  
Dexin Yin ◽  
Yue Zhao ◽  
Yezhou Li ◽  
Dejiang Yao ◽  
...  
Keyword(s):  
Large Scale ◽  
Meta Analysis ◽  
Single Species ◽  
Total Plasma ◽  
Control Groups ◽  
Randomized Controlled ◽  
Randomized Controlled Studies ◽  
The Difference ◽  
The Relationship ◽  
Healthy Participants

Summary: Our meta-analysis focused on the relationship between homocysteine (Hcy) level and the incidence of aneurysms and looked at the relationship between smoking, hypertension and aneurysms. A systematic literature search of Pubmed, Web of Science, and Embase databases (up to March 31, 2020) resulted in the identification of 19 studies, including 2,629 aneurysm patients and 6,497 healthy participants. Combined analysis of the included studies showed that number of smoking, hypertension and hyperhomocysteinemia (HHcy) in aneurysm patients was higher than that in the control groups, and the total plasma Hcy level in aneurysm patients was also higher. These findings suggest that smoking, hypertension and HHcy may be risk factors for the development and progression of aneurysms. Although the heterogeneity of meta-analysis was significant, it was found that the heterogeneity might come from the difference between race and disease species through subgroup analysis. Large-scale randomized controlled studies of single species and single disease species are needed in the future to supplement the accuracy of the results.

PHYSICO-CHEMICAL ASPECTS OF YAMUNA RIVER AT GOKUL BARRAGE, MATHURA (UP) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AJAY KUMAR RAJAWAT ◽  
PRAVEEN KUMAR
Keyword(s):  
Water Samples ◽  
Suspended Solids ◽  
Total Dissolved Solids ◽  
Tolerance Limit ◽  
Chemical Condition ◽  
Yamuna River ◽  
Dissolved Solids ◽  
Time Period ◽  
Physico Chemical ◽  
Almost All

An attempt has been made to study the Physico-chemical condition of water of Yamuna River at Gokul Barrage, Mathura, (UP). The time period of study was July 2015 to June 2016. Three water samples were selected from different sites in each month for study. The parameters studied were Temperature, Turbidity, pH, DO, BOD, COD, Total Dissolved Solids and Suspended Solids. Almost all the parameters were found above the tolerance limit.

Performance Study of Some Reverse Osmosis Systems for Removal of Uranium and Total Dissolved Solids in Underground Waters of Punjab State, India

2014 ◽  
Vol 4 (2) ◽  
pp. 467-476
Author(s):  
Nisha Sharma ◽  
Jaspal Singh ◽  
Barjinder Kaur
Keyword(s):  
Drinking Water ◽  
Reverse Osmosis ◽  
State Government ◽  
Total Dissolved Solids ◽  
Internal Exposure ◽  
Drinking Water Source ◽  
Performance Study ◽  
Dissolved Solids ◽  
Underground Waters ◽  
High Concentrations

Radionuclides (uranium, thorium, radium, radon gas etc.) are found naturally in air, water, soil and rock. Everyday, we ingest and inhale these radionuclides through the air we breathe and through food and water we take. Out of the internal exposure via ingestion of radionuclides, water contributes the major portion. The natural radioactivity of water is due to the activity transfer from bed rock and soils. In our surveys carried out in the past few years, we have observed high concentrations of uranium and total dissolved solids (TDS) in drinking waters of some southern parts of Punjab State exceeding the safe limits recommended by national and international agencies. The main drinking water source is the underground water procured from different depths. Due to the highly saline taste, disorders in their digestive systems and other ailments, people are installing reverse osmosis (RO) systems in their houses. Some RO systems have been installed on commercial basis. The state government is also in the process of installing community RO systems at the village level. As high values of uranium are also undesired and may pose health hazards due to radioactivity and toxicity of uranium, we have conducted a survey in the field to study the performance of various RO systems for removal of uranium and TDS. Water samples from about forty RO systems from Faridkot, Mansa, Bathinda and Amritsar districts of Punjab State were collected and analyzed. Our results show that some RO systems are able to remove more than 99% of uranium in the underground waters used for drinking purposes. TDS values are also reduced considerably to the desired levels. So RO systems can be used to avoid the risk of unduly health problems posed by high concentrations of uranium and TDS in drinking water.

TO THE PROBLEMS OF COMBATING CORRUPTION IN MODERN RUSSIA AND INTERNATIONAL COOPERATION IN THE FIELD OF ANTI-CORRUPTION

2020 ◽  
Author(s):  
Angela Dranishnikova
Keyword(s):  
Large Scale ◽  
The State ◽  
Point Of View ◽  
Modern Life ◽  
Existing Problems ◽  
Moral Point ◽  
Material Goods ◽  
The Russian Federation ◽  
The Difference ◽  
The Government

In the article, the author reflects the existing problems of the fight against corruption in the Russian Federation. He focuses on the opacity of the work of state bodies, leading to an increase in bribery and corruption. The topic we have chosen is socially exciting in our days, since its significance is growing on a large scale at all levels of the investigated aspect of our modern life. Democratic institutions are being jeopardized, the difference in the position of social strata of society in society’s access to material goods is growing, and the state of society is suffering from the moral point of view, citizens are losing confidence in the government, and in the top officials of the state.

PENGARUH KONSENTRASI RAGI Saccharomyces cerevisiae DAN LAMA FERMENTASI TERHADAP KUALITAS CUKA TOMI-TOMI (Flacourtia inermis)

2015 ◽  
Vol 4 (2) ◽  
pp. 50-55
Author(s):  
Sandra J Nendissa ◽  
Rachel Breemer ◽  
Nikholaus Melamas
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Experimental Design ◽  
Total Dissolved Solids ◽  
Total Sugar ◽  
Dissolved Solids ◽  
Randomized Experimental Design ◽  
Two Factors ◽  
Four Levels

This objectives of this research were both to study and determine the best level of concentration of yeast Saccharomyces cereviseae and period of fermentation on the quality of tomi-tomi vinegar (Flacourtia inermis). A completely randomized experimental design with two factors of treatment was applied in this research. The first factor was concentration of yeast S. cereviseae having four levels of tretament, i.e.: without the addition of yeast 0.5, 1 and 1.5 g yeast. The second factor was period fermentation with 1, 2, 3, 4, and 5 weeks. The result indicated that the concentration of yeast S. cereviseae 1.5 g and period fermentation 5 week produced a good tomi-tomi vinegar with total acids 51.22%, total dissolved solids 8.35, total sugar 8.07% and pH 5.40.

Combination of Carbonated Aloe Vera Drink with Lemon Juice

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Jefrianta Demu Geri ◽  
Dewi Fortuna Ayu ◽  
Noviar Harun
Keyword(s):  
Vitamin C ◽  
Aloe Vera ◽  
Sweet Taste ◽  
Total Dissolved Solids ◽  
Lemon Juice ◽  
Dissolved Solids ◽  
Combination Treatments ◽  
Randomized Design ◽  
Yellow Color ◽  
Range Test

The purpose of this study was to determine the optimal ratio of carbonated aloe vera drink and lemon juice. This research used completely randomized design with four treatments and four replications. The treatments performed were L1 (90% carbonated aloe vera and 10% lemon juice), L2 (80% carbonated aloe vera and 20% lemon juice), L3 (70% carbonated aloe vera and 30% lemon juice), and L4 (60% carbonated aloe vera and 40% lemon juice). Data were statistically analyzed by using analysis of variance (ANOVA) and followed by duncan new multiple range test (DNMRT) at level 5%. The combination treatments of carbonated aloe vera drinks and lemon juice had a significant effect on acidity (pH), vitamin C, total dissolved solids, and descriptive and hedonic sensory assessment. The best treatment from the research was L3 (70% carbonated aloe vera and 30% lemon juice) with pH of 4.26, vitamin C of 19.97 mg, and total dissolved solids of 14.34°brix. The overall sensory test result preferred by panelists with descriptions of yellow color, lemon flavor, and had a slightly sweet taste.

Study and Evaluation of Stored Drinking Water Characteristics Using Three Types of Roof Water Tanks in Kirkuk Governorate, Iraq

2019 ◽  
Vol 7 (1) ◽  
pp. 11-16
Author(s):  
Abdulkhaleq K Mahmood ◽  
Ali A Kamal ◽  
Ako R Hama
Keyword(s):  
Drinking Water ◽  
Storage Time ◽  
Total Dissolved Solids ◽  
Water Tank ◽  
Dissolved Solids ◽  
Water Characteristics ◽  
Three Samples ◽  
Water Metal ◽  
Water Tanks ◽  
Better Than

The scarcity of safe drinking water is one of the problems faced by the majority of cities in the world. Kirkuk city is one of these cities, which suffer from a shortage of drinking water. People have adopted the use of different rooftop tanks to overcome this problem. This research focuses on studying the effect of storage time on the five main characteristics of drinking water, which include, acid index (pH), electrical conductivity (EC), total suspended solids (TSS), total dissolved solids (TDS), and turbidity (Tr). Three types of tanks were used predominantly (galvanized metal, plastic, and aluminum tanks). By analyzing the results, the characteristics of three samples of municipal source water obtained. Three samples were taken from each tank at different periods (4, 8, and 12 days). The results showed that the storage time affected the characteristics of drinking water. These characteristics differed from one tank to another. Metal tanks showed an increase in total dissolved solids, due to the evaporation process, even as plastic and aluminum tanks showed an increase in pH. The properties of all storage water tanks changed with times, but overall, the results were within the Iraqi limitation for drinking water. It was not easy to only depend on the results of this study to believe that any one type of water tank was better than the other, as the values of most of the variables studied had varied from one type to other. However, many studies have indicated a number of health risks, and most significantly with regard to plastic tanks, which are said to contain dangerous organic compounds that can be transferred to water. Metal tanks can cause zinc leakage, caused by a number of environmental factors at high levels. Aluminum tanks also can have an effect on the water in tanks.

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