scholarly journals Carriers of nickel nucleosynthetic anomalies uncovered by a step leaching experiment

2021 ◽  
Author(s):  
Georgy Makhatadze ◽  
Martin Bizzarro ◽  
Martin Schiller
Keyword(s):  
Leaching Experiment

scholarly journals An Experimental Study on the Sources of Strontium in Mineral Water and General Rules of Its Dissolution—A Case Study of Chengde, Hebei

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 699
Author(s):  
Ruifeng Wang ◽  
Xiong Wu ◽  
Yanliang Zhai ◽  
Yuxuan Su ◽  
Chenhui Liu
Keyword(s):  
Experimental Study ◽  
Mineral Water ◽  
Surrounding Rock ◽  
Mechanism Of Formation ◽  
High Quality ◽  
General Rules ◽  
Leaching Experiment ◽  
High Level ◽  
Impact Experiments

Chengde City boasts a wealth of high-quality mineral water resources characterized by a high level of strontium (Sr), a low level of sodium, and low alkalinity. In order to study the mechanism of formation of Sr-bearing mineral water in Chengde and to scientifically guide future mineral water exploration, taking three typical mineral water exploration areas in Chengde as examples, this paper studies the sources of Sr in mineral water and the general rules of its dissolution via a laboratory static leaching experiment and impact experiments, and it provides an analysis of the characteristics of typical rock samples. The research results indicate that the content of Sr in surrounding rock and the characteristics of minerals existing in surrounding rock jointly control the dissolution of Sr in water; that CO2 can promote the formation of mineral water containing Sr; and that temperature increases may boost the dissolution of Sr from carbonate minerals but also inhibit the dissolution of Sr from silicate minerals.

scholarly journals The effect of temperature and digested sewage sludge cover over tailings on the leaching of contaminants from Ballangen tailings deposit

2021 ◽  
Author(s):  
Jinmei Lu ◽  
Tiina Leiviskä ◽  
Ingar Walder
Keyword(s):  
Climate Change ◽  
High Temperature ◽  
Sewage Sludge ◽  
Mine Drainage ◽  
Effect Of Temperature ◽  
Threshold Temperature ◽  
Low Salinity ◽  
Leaching Experiment ◽  
Change Context ◽  
Digested Sewage Sludge

Abstract Dry covers can be applied above tailings to reduce and prevent formation of acid mine drainage and leaching of contaminants. Efficiency of covers is affected by different parameters, of which temperature change under climate change context is one. Here, a laboratory column leaching experiment was performed under four temperatures, 5, 10, 14, and 18 °C on unoxidized tailings from Ballangen, Norway. 600 mL of water was added to each column every second week and leachate collected and analyzed for pH, salinity, alkalinity, concentrations of sulfate, Co, Fe, Mn, Ni, and Zn. A thin layer of digested sewage sludge was added to columns after the 16th leaching cycle. In total, 21 leaching cycles were performed. Results showed low oxidation of tailings and therefore high pH and low salinity, SO42−, Fe, Ni, and Co in the leachates at leaching temperature of 5 °C. Addition of sludge cover slowed down oxidation of underlying tailings and decreased leaching of SO42−, Fe, Mn, Co, Ni, and Zn from the tailings deposit, especially at relatively high temperature. 10 °C is a threshold temperature, below which leaching is not affected by the cover addition so much. At a leaching temperature higher than 10 °C, the sludge cover addition can reduce the leaching of elements significantly.

scholarly journals Bacterially generated Fe2(SO4)3 from pyrite, as a leaching agent for heavy metals from lignite ash

2007 ◽  
Vol 72 (6) ◽  
pp. 615-619 ◽  
Author(s):  
Jelena Jekic ◽  
Vladimir Beskoski ◽  
Gordana Gojgic-Cvijovic ◽  
Mirjana Grbavcic ◽  
Miroslav Vrvic
Keyword(s):  
Heavy Metals ◽  
Environmental Protection ◽  
Coal Combustion ◽  
Shake Flask ◽  
Metal Leaching ◽  
Testing Technique ◽  
Leaching Experiment ◽  
Leaching Efficiency ◽  
Oxidation Agent ◽  
Ash Leaching

Investigations of heavy metals from lignite ash, which is a coal combustion by-product, have for years been very interesting from different aspects of environmental protection. In this study, the possibility of microbiological ash leaching, with a strong oxidation agent, bacterially generated Fe2(SO4)3 was investigated in order to minimize the concentration of toxic ash elements. Leaching experiment by the shake flask testing technique was performed during a period of 20 d at a temperature of 28?C. The results obtained show 5- to 22-fold (for Cd and Ni approx. 5, Zn approx. 6, Mn approx. 8, Cr approx. 13 and Cu approx. 22) higher metal leaching efficiency in the suspension with bacterially generated Fe2(SO4)3 than in the control suspension. .

Some guidelines to the design of a diagnostic leaching experiment

1995 ◽  
Vol 8 (3) ◽  
pp. 247-256 ◽  
Author(s):  
L. Lorenzen
Keyword(s):  
Leaching Experiment

Analysis of Physical and Chemical Features of Sintering Dust and Study of Recycling Treatment

2015 ◽  
Vol 768 ◽  
pp. 350-362
Author(s):  
Bin Pei ◽  
Guang Zhan ◽  
Zhan Cheng Guo ◽  
Jin Tao Gao
Keyword(s):  
Calcium Carbonate ◽  
Potassium Chloride ◽  
Sodium Carbonate ◽  
Calcium Sulfate ◽  
Sodium Carbonate Solution ◽  
Potassium Sulfate ◽  
Water Leaching ◽  
Leaching Experiment ◽  
Leaching Solution ◽  
Physical And Chemical

Several physical and chemical detection methods were used to study the basic properties of sintering dust collected from Baogang Steel Corporation. The result shows that the major constituents of the electrostatic precipitator dust (ESP dust) were KCl, NaCl, Fe2O3 and Fe3O4. Water leaching experiment on the sintering dust had shown that the KCl in the ESP dust could be separated and recovered by water leaching and fractional crystallization. Component analysis of leaching solution showed that the massive calcium sulfate in the leaching solution should be removed first in order to obtain the pure potassium salt. In order to provide theoretical guidance to inhibit the dissolution of calcium ions from the sintering dust, the water leaching experiment of ESP dust and the dissolution behavior of CaSO4 in the potassium chloride, sodium chloride, potassium sulfate and their mixed salt solution were studied. Result showed that, a lower liquid-solid ratio should be chosen in the leaching process to inhibit the dissolution of calcium sulfate dehydrate. Using sodium carbonate solution as a precipitating agent, the influences of the concentration of sodium carbonate solution, reaction temperature, stirring speed on the preparation of the spherical calcium carbonate were studied. Spherical calcium carbonate with good dispersing performance and grain size distribution in nanometer range of less than 10μm was obtained. The production technology of potassium sulfate by double decomposition was sutdied, the results showed that over 80% and 12.76% of the recovery rate of potassium sulfate and potassium chloride ammonium compound fertilizer could be obtained. Furthermore, a potassium recovery process with joint production of spherical calcium carbonate and potassium sulfate was designed. This process is technically viable and considerable in economic benefit.

scholarly journals Analysis and leaching experiment of slag produced by an arc plasma treatment of fly ash.

2002 ◽  
Vol 51 (8) ◽  
pp. 633-640 ◽  
Author(s):  
Yorie KANEKO ◽  
Masaki OHATA ◽  
Naoki FURUTA ◽  
Yuya KUBO ◽  
Tsugunori INABA
Keyword(s):  
Fly Ash ◽  
Plasma Treatment ◽  
Arc Plasma ◽  
Leaching Experiment

scholarly journals Importance of lateral flux and its percolation depth on organic carbon export in Arctic tundra soil: Implications from a soil leaching experiment

2017 ◽  
Vol 122 (4) ◽  
pp. 796-810 ◽  
Author(s):  
Xiaowen Zhang ◽  
Jack A. Hutchings ◽  
Thomas S. Bianchi ◽  
Yina Liu ◽  
Ana R. Arellano ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Arctic Tundra ◽  
Tundra Soil ◽  
Soil Leaching ◽  
Carbon Export ◽  
Leaching Experiment ◽  
Arctic Tundra Soil

Application of alkaline slag and phosphogypsum for alleviating soil acidity in an Ultisol profile: a short-term leaching experiment

2014 ◽  
Vol 15 (2) ◽  
pp. 365-373 ◽  
Author(s):  
M. M. Masud ◽  
Jiu-Yu Li ◽  
Ren-kou Xu
Keyword(s):  
Soil Acidity ◽  
Short Term ◽  
Leaching Experiment ◽  
Alkaline Slag

Coupling Flow-Reaction-Transmission during Square Column Leaching Processes

2013 ◽  
Vol 734-737 ◽  
pp. 698-702
Author(s):  
Jin Zhi Liu ◽  
Yu Hang Li ◽  
Bao Hua Yang
Keyword(s):  
Numerical Simulation ◽  
Hydraulic Conductivity ◽  
Leaching Rate ◽  
Analysis Software ◽  
Copper Ore ◽  
Column Leaching ◽  
Changing Trends ◽  
Copper Leaching ◽  
Leaching Experiment ◽  
Flow Reaction

This paper designs a square column leaching experiment to probe the coupling flow-reaction-transmission. 2.372 kg of Yanglas copper ore with a grade of 1.25% was loaded in a 6×6 cm2 column whose height is 60 cm. A 28-day leaching gave an approximate copper yield of 14.5 gram, which is an equivalence of copper leaching rate being 50%. Hydraulic conductivity was measured. The changing trends are analyzed by mathematical analysis software Eviews and Matlab, and the numerical simulation was conducted.

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