(PDF) Leaching and migration characteristics of nitrogen
Leaching and migration characteristics of nitrogen during coastal saline soil remediation by combining humic acid with gypsum and bentonite February 2023 …
Effects of aspect–vegetation complex on soil nitrogen …
Leaching and migration characteristics of nitrogen during coastal saline soil remediation by combining humic acid with gypsum and bentonite. 2023, Annals of Agricultural Sciences. Show abstract. Coastal saline soil is an important resource that is widely-distributed and available for mitigation, development and utilization. Adding …
Leaching and migration characteristics of nitrogen during …
Leaching and migration characteristics of nitrogen during coastal saline soil remediation by combining humic acid with gypsum and bentonite
Rehydration Driven Acid Impregnation of Thermally …
A new approach to acid activation of raw Ca-bentonite was explored. The method consisted in dehydration of clay by thermal pretreatment at 200 °C, followed by immediate impregnation with H 2 SO 4 solution. ... the rehydrated interlayer Ca 2+ underwent rapid exchange with H 3 O + and formed extra-framework gypsum. Acid …
Mineralogy of a bentonite from Miles, Queensland, Australia …
We analysed the effect of acid treatment on the composition of the remaining solid and solution, as well as the precipitates that formed. The bentonite deposit was formed in a shallow lacustrine environment. Of the 24 million tonnes of confirmed reserves, only about 1.2 million tonnes have been mined since 1971 (Hay, personal …
A systematic and comprehensive study of Eco-friendly bentonite …
Vijayakumar et al. (2009) evaluated acid-activated bentonite as a catalyst in the esterification reaction of the different carboxylic acid with alcohols or p-cresol. Acid activation of bentonite was carried out in concentrated H 2 SO 4 and characterized by FTIR, XRD, SEM, TGA, acid titration and BET surface area. Esterification was carried …
Fall sulfur application: Selecting the best product
One of the most common products containing sulfur is elemental sulfur mixed with bentonite clay, which helps form elemental sulfur into small disks called pastilles. Tiger 90 is a product that uses this mix and has a …
Bentonite
Bentonite Lumps is used in vertical drilling fluids to increase viscosity and filtration control. This mineral is also ideal in drilling fluids because it expands when exposed to water. This expansion helps down whole formations to be sealed from invading drilling fluids. The Drilling Bentonite Lumps extracts the drill cuttings from around the ...
Bentonite | IMA Europe
According to the final application, bentonite is either sieved (granular form) or milled (into powder and superfine powder form). For special applications, bentonite is purified by removing the associated gangue minerals, or treated with acids to produce acid activated bentonite (bleaching earths), or treated with organics to produce organoclays.
A lauric acid-hybridized bentonite composite phase-changing material
In this study, a form-stable composite phase-changing material (PCM) was synthesised by a vacuum impregnation method. Natural Na-bentonite and lauric acid (LA) were used as the supporting material and PCM, respectively. In addition, flake graphite (FG) was used for enhancing the thermal conductivity of the form-sta
(PDF) Bentonite processing
Bentonite has vide variety of uses. Special use of bentonite, where. its absorbing properties are employed to provide water-tight sealing is. for an underground repository in granites In this ...
Effect of applying different materials on the nitrate content …
Download scientific diagram | Effect of applying different materials on the nitrate content of the leaching solution in different periods. A: Co-application of humic acid (HA) and …
Influence of Bentonite on Mechanical and Durability …
The results revealed that incorporation of bentonite (10 wt % with ordinary Portland cement) showed appreciable improvement in the strength and durability of both …
Preparation and hardened properties of lightweight gypsum …
Bentonite contains Ca 2+ and has a strong ion exchange capacity, but compared to gypsum, bentonite also has a high degree of water absorption and swelling properties (Jiang et al., 2019). It was ...
Chemical and mineralogical reactions of bentonites in …
Gypsum, in conclusion, is a rather soluble component of some bentonites and readily dissolves and precipitates within the barrier. The thermodynamic constants …
Modification of bentonite by combination of reactions of acid
The FTIR spectra for the manufactured Mt nanosystems over the entire absorption range ( Figure 4A) showed absorption peaks at around 3624 cm −1, which can be related to the structural OH groups ...
Chemical and mineralogical reactions of bentonites in …
The simulated dissolved SO 4 2− concentrations underestimated the porewater concentration data, possibly due to uncertainties in the initial amount of gypsum in the bentonite. A similar approach was followed by Arcos et al. ( 2000 ), simulating the interaction between bentonite buffer and groundwater over 100,000 years.
a. SEM of bentonite (20 kV, 1000×, 10 μm).
SEM of bentonite (20 kV, 1000×, 10 μm). from publication: Strength characteristics of bentonite–lime–gypsum mix reinforced with coir fibres | The paper presents the strength characteristics ...
BENTONITE
Bentonite is a multi-use clay generated from volcanic ash. They are considered predominantly in the smectite mineral family. This volcanic clay was formed millions of years ago when mineral sea deposits came in contact with the Earth's surface at incredibly high temperatures. The result created a magnetic charge, hence the alternative name ...
Swelling characteristics of soils subjected to acid contamination
The XRD patterns of the bentonite inundated with water and acid solutions are shown in Fig. 4.Bentonite is dominant with sodium montmorillonite along with kaolinite and quartz.The formation of a new mineral, gypsum, was observed in the bentonite with 1 N H 2 SO 4 and 4 N H 2 SO 4. Gypsum is a calcium sulphate hydrate mineral. As …
Effect of bentonite as a soil amendment on field water …
Zhou, L. et al. Effect of bentonite-humic acid application on the improvement of soil structure and maize yield in a sandy soil of a semi-arid region. J. Geoderma. 338, 269–280 (2019).
GOOD EARTH 15KG BAG BENTONITE GYPSUM MIX
Bentonite/Gypsum . Share this product. Enter email address. Include a message (optional) Send Email F-Gas (Fluorinated gases) government regulations specify that a limited number of products can be sold in the European Union that contain F-gases which have been linked to climate change.
RETRACTED ARTICLE: A technology review on treatment of acid …
BOF removes contaminants from AMD via neutralization. Sulfate is removed by chemical binding into Ca to form gypsum but that is not adsorption. Adsorption is a process where an adsorbate is adsorbed onto an adsorbent. ... Xiao LP, Geng XH, Pei G (2016) Treatment of acid mine drainage by bentonite composite particles cooperate …
Preparation and characterization of acid-activated bentonite …
Abstract. The Kütahya calcium bentonite (CaB) from Turkey shows significant changes in crystal structure, chemical composition and porosity with H2SO4 activation realized by heating its acidic ...
Rehydration Driven Acid Impregnation of Thermally …
Upon aging, the XRD pattern of acid activated bentonite undergoes further change, as, gradually, the maximum of the basal reflection moves back to the lower 2Θ values. ... Further storage does not change the gypsum bands intensity, which confirms that cation exchange of Ca 2+ with hydronium ions and precipitation of the extra …
Effect of applying different materials on the nitrate content …
Download scientific diagram | Effect of applying different materials on the nitrate content of the leaching solution in different periods. A: Co-application of humic acid (HA) and gypsum, B: Co ...
Reaction Kinetics of Sodium Bentonite with Different Acid
Discovering the characteristics of the reaction kinetics of acid systems (hydrogen fluoride (HF), hydrochloric acid (HCl), and CH 3 COOH) at different concentrations with sodium bentonite can provide experimental support for optimising formulations used in removing plugs through acidification. By utilising a …
Material Bulk Density Reference Chart Material Bulk …
Citric Acid 48 Clay 50 Clay (Bentonite) 50 Clay (Calcined) 30 Clay (Fine) 62 Clay (Fines) 70 Clay (Georgia) 65 Clay (Granite) 32. Clay (Helium) 36 Clay (Kaolin) 48 Clay P2 48 ... Gypsum 54 Gypsum (Calcined) 55. Gypsum (Ground) 42 Gypsum Stucco 50. Halon 22 Hash Spice 66 Hell Blue Dye 19 Hexahicel 32 Hexa-Melamine 33 Hexamine 42 Hexa …
Characterization of activated bentonite clay mineral and the …
After the acid activation, the analysis data showed a significant change in the chemical composition in modified bentonite clay, compared to the raw bentonite clay. The acid activation of bentonite caused an increase in the amount of Si +4 and Ti +4; this increase could be attributed to the remobilization of cations in the octahedral or ...
Preparation and hardened properties of lightweight gypsum plaster …
Therefore, the leaching and migration characteristics of N in saline soils of the Yellow River Delta (Shandong Province, China) with the addition of weathered coal humic acid (HA), gypsum and bentonite, were examined using soil columns and 15 N isotope tracers. The results showed that co-application of HA and gypsum could …