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احصل على السعرYou can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.The use of calcined clays as supplementary cementitious materials provides the opportunity to significantly reduce the cement industry’s carbon burden; Clay calcination technology: state-of-the-art review by the
احصل على السعر2:1 (e.g. illite; montmorillonite; pyrophyllite) clay minerals and consist primarily of mineral particles with a particle size of less than 20 lm. Clay deposits occur in Furthermore, as a cement substitution, the combination of calcined clay and limestone brings many benefits, including the enhanced ultimate mechanical and Improving structural build-up of limestone-calcined clay
احصل على السعرThis paper provides an efficient alternative way to conserve natural clays and to reduce both fired bricks costs production and wastes amounts generation. It aims The samples of roof tile clayey mass (10% of waste at 850°C and at 1150°C) obtained physical-mechanical property values that match Brazilian technical Limestone Waste Incorporation in Clayey Mass for Rustic
احصل على السعرAbstract The new clay modified with triazole and triazolium ligands was prepared in this research. These materials were applied as abundant and eco-friendly adsorbents for removal of heavy metal ions such as Pb(II), Co(II) and Zn(II) ions. The adsorption efficiency of these materials was calculated by relevant equations such as Mitigation of harmful algal blooms (HAB) using modified clay is reviewed. • Clay surface modification is the key to improving HAB removal efficiency. • Modified clay can be prepared by means of physical and chemical methods. • Modified clay can control HAB with negligible negative effects on aquatic ecosystems. •Mitigation of harmful algal blooms using modified clays:
احصل على السعرThe lower viscosity of methanol may more readily dislodge clay particles adhering to the valve surface, making it a more effective clay-removal agent. An alternative explanation is that methanol leaches Mg from ostracod calcite, and cleaning experiments performed on valves from cultured ostracods would provide a good test of any directThe calcined clay was placed in a vessel in a sand bath at 60°C and h umidified with the solution that contained the mass of precursor zinc acetate (2.42 g), which was diluted in a volume of distilled water. The drops were added to the order of 0.3 mL min –1. followed by clay with manual stirring, using a glass rod.Natural and Modified Clays for the Removal of Cationic
احصل على السعرIt is shown that the removal of silicate contamination is the most important step for the measurement of Mg/Ca ratios. In an example, bulk sample Mg/Ca decreases from 10.5 to 2.5 mmol mol−1 during clay removal. Oxidation of organic material causes a lowering of sample Mg/Ca in the order of 10% or approximately 1°C when converted to By lowering the clay quantity to 50 mg at pH 7, the removal percentage is > 93% at 3 wt. % and 10 wt. % corn oil (Table 4). On the other hand, changing the pH value to pH 3 shows a higher extraction using 3% corn oil than those extraction experiments using 10% corn oil to reach < 90% removal when clay amount is 50 mg (Table 4). The results ofEffect of Corn Oil Addition to TCMA-Modified Clay on ZEN Removal
احصل على السعرThe presence of ultrafine clay particles that are difficult to remove by conventional filtration creates many operational problems in mining processing systems. In this work, the removal of clay suspensions has been investigated using an electroflotation (EF) process with titanium electrodes. The results show that EF is a viable and novel The removal of amorphous coatings and crystals of free iron oxides, parti cularly hematite and goethite, which act as cementing agents, is important in many types of analysis of soils and clay minerals. The removal of free iron oxides aids in dispersion of the silicate portion, which is essential for effectiveIRON OXIDE REMOVAL FROM SOILS AND CLAYS BY A
احصل على السعرMetal-impregnated clay amendments (10 %wt) enabled treatment at lower temperatures. • Pyrolysis degradation products appeared at lower temperatures in amended soils. • Fe and Cu play a catalytic role, decreasing needed temperature & contact time. • Fe-exchanged bentonite enhanced TPH removal more than Cu-exchanged bentonite.In most cases, with the exception of RAPiD 6-3B, the first clay removal step (T1 ultrasonification in ultrapure water) has the biggest impact on benthic and planktic foraminifera I/Ca ratios, reducing I/Ca by two-thirds for epifaunal P. limbata and infaunal U. striata benthic foraminiferal species from M77/1–565/MUC-60, and causing a 10-foldForaminifera Iodine to Calcium Ratios: Approach and Cleaning
احصل على السعرExtracting cesium (Cs) from nonexpandable illite clay is important in the remediation of radioactive Cs-contaminated soil. In this study, we investigated a chloride salt treatment technique for the removal of Cs from illite. Cs-loaded illite samples with initial Cs concentrations of 2430 and 690 ppm were treated using a NaCl–MgCl2–CaCl2 ternary In the last decade, exfoliating the natural clays to low dimensional nanosheets or nanotubes for preparation of multifunctional clay-based adsorbents has attracted considerable attention. In this review, we have summarized the removal of heavy metals and dyes by clay-based adsorbents, from natural clays to 1D clay nanotubes and Removal of heavy metals and dyes by clay-based adsorbents
احصل على السعرIn this work, montmorillonite clay was collected from the Bengurir region; Morocco was used as an eco-friendly adsorbent for the removal of chromium (III) at various operating conditions. The used adsorbent was characterized using X-ray diffraction, X-ray fluorescence spectrometry, Fourier Transform Infrared Spectroscopy, and scanning In this work, we describe a facile and low-cost approach to fabricate porous calcium alginate composite sponges containing exfoliated bentonite clay (denoted as CRAB) by saponin-assisted foaming and external gelation techniques for efficient removal of Cu 2+ and Cr 6+ ions from aqueous solution and real world water samples. The Removal of heavy metals from water by macro-mesoporous
احصل على السعرRemoval of Cd (II) from aqueous phase was investigated using the modified clays under different experimental conditions of reaction time, pH and adsorbent dosage. Detailed isotherms and kinetic studies showed that the modified clays have much higher Cd (II) adsorption capacity compared to those of the starting clay minerals.The aim of this study is the valorization of the Moroccan clays (QC-MC and QC-MT) from the Middle Atlas region as adsorbents for the treatment of water contaminated by cadmium Cd (II) ions. The physicochemical properties of natural clays are characterized by ICP-MS, XRD, FTIR, and SEM techniques. The adsorption process is Studies on the Removal of Cadmium Toxic Metal Ions by
احصل على السعرRemoval of emerging contaminants, such as antibiotics, from wastewater by adsorption is a simple, low-cost, and high-performance process; however, regeneration and reuse of the exhausted adsorbent are necessary to make the process economically viable. This study aimed to investigate the possibility of electrochemical-based regeneration of The Qmax and Rmax of the dynamic removal were 880 mg/g and 74.5% respectively. It could be concluded that NaA-ZMs could be excellent Pb (II) adsorbents whether in the static or the dynamic removals. Because the ions exchange between Na (I) and Pb (II) is the main removal mechanism, the morphology of NaA-ZMs damaged Synthesis of NaA-zeolite microspheres by conversion of
احصل على السعرIn an example, bulk sample Mg/Ca decreases from 10.5 to 2.5 mmol mol-1 during clay removal. Oxidation of organic material causes a lowering of sample Mg/Ca in the order of 10% or approximately 1
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