ويركزمعهد بحوثالعامة لليمينغ الصناعة الثقيلةفي مجال البحوث وتطوير التكنولوجيا المتقدمة والمنتجات الموجهة لصالح العملاء، فضلا عن بناءالقدرة التنافسية الجوهريةليجعل يمينغالصناعة الثقيلةرائدةفي هذه الصناعة.من خلال توفيرنتائج البحوثالأساسية، ويدعم المعهديمينغالصناعة الثقيلةالتكنولوجيا والمنتجات لتكون أعلىمنهافي العالمالقائمة.
معهد بحوثالعامة لليمينغ الصناعة الثقيلةهيقسم البحث والتطويرالأوليةللبحوثالتقنيةوالإدارة التقنية. وهي مسؤولة عنتطوير التكنولوجياالمطبقة علىيمينغجميع المنتجات، وإجراء البحوث الفنيةمقدمةعلى المنتجات الجديدةووضعالمعايير؛البحثالاهتزاز، والأثر، والضوضاء، والتكنولوجيا الهيدروليكية، والمطابقة الطاقةوتوفير الطاقة، والمواد الجديدة، وأنظمة التحكم، وخلق تكنولوجياتمبتكرة ومنتجاتحمليوبناءمنصة علىشبكة خاصةوعامةللتجاربوالاختباراتوذلك لتبادل التجربةالعامة ونتائج الاختبار.
Herein, the facile one step acid activation of bentonite derived functionalized adsorbent (AB) for the effective remediation of both ionic and nonionic secondary pesticides, ametryn andThe mesopore size distribution, micropore volume and mesopore volume changes greatly as a result of acid activation Thus, more porous materials than the Preparation and characterization of acidactivated
acid attack, adsorption, bentonite, chlorothalonil, themal activation INTRODUCTION Listen Montmorillonite (Mt) is the most widely known and applied clay Acid activation is performed to considerably increase the surface area of the bentonite and create additional acidic reaction sites This treatment is useful for applications like edible oil refinement and purification of Bentonite production Clariant Ltd
In this paper, we proposed a facile modification strategy to enhance adsorption performance of bentonite utilizing synergistic acid activation and hydroxyl activation is proposed Sulfuric acid, acetic acid (vacid/wclay ratio=20, 40 and 60%) and sulfuric/acetic mixtures (1:1 ratio) were used in the bentonite clay activation The Acid activation of bentonite clay for recycled ResearchGate
Acid activation technique was opted for modifying natural bentonite (NB) to enhance the adsorptive removal of CIP from water The BET surface area One step acid activation of bentonite derived adsorbent for the effective remediation of the new generation of industrial pesticides Sci Rep 10,1–13 (2020)Sodium saltassisted low temperature activation of
Our previous study reported that the acid activation of bentonite using a singleacid solution, such as sulfuric acid, nitric acid, or phosphoric acid, improved the electrical conductivity in tap water This Acid activation is a chemical treatment traditionally used on clays, typically bentonites in hydrochloric or sulphuric acid, to obtain partly dissolved materials with enhanced surface properties suitable for new applications or displaying interesting new behaviour This paper is based mostly on the results of longrunning experiments in ourAcid activated clays: Materials in continuous demand
Bentonite is an important impure clay, aluminum phyllosilicate adsorbent, usually contains montmorillonite with structure a gibbsite layer placed between silica layers to produce the structural unit (Fig 215) [11, 143]The replacements are specially within the octahedral layer (Mg 2 +, Fe 2 +) and to a much lesser degree between the silicate layer (Al 3 +/Si 4 +)The characteristics of acidactivated raw bentonite (RB) activated with binary acid solutions sulfuric acid + nitric acid, nitric acid + phosphoric acid, and phosphoric acid + sulfuric acid, at a concentration Preparation and Characterization of AcidActivated
Acid activation was carried out by heating muds prepared from Carich bentonite (CaB), sulfuric acid (H 2 SO 4) and distilled water, yielding various bleaching earths (BEs)The roles of each of the process variables, namely mass fraction of H 2 SO 4 (x) in the dried CaB and pure H 2 SO 4 mixture, heating temperature (T) and contact time Acid activation is a common chemical modification of clays, usually bentonites, with a hot solution of a mineral acid (typically HCl or H 2 SO 4 ), and it is used for both scientific and industrial purposes The aim is to obtain partly dissolved material of increased specific surface area, porosity and surface acidity The product consists partly Acid Activation of Clay Minerals SciSpace by Typeset
Bleaching earths are produced through the acid activation of calcium bentonites (Önal & Sarıkaya, 2007; Komadel, 2016) Hydrochloric acid o r sulphuric acid has been used for t he activationThe objective of this work was to determine the changes of thermal and surface properties of a bentonite from Çankιrι after activation using different concentrations of H2SO4 solutions (05–4 M) XRD, FTIR, DTA, and TG analyses of the samples were performed to examine the structural changes of the bentonite before and after acid Sulphuric Acid Activation of a Calcium Bentonite
Increasing gas adsorption values of acidtreated bentonites were analysed depending on the structural changes of the clay The NH 3adsorption capacities of the bentonite samples (3801–5068 mmol g –1) were also compared with previously studied claybased materials (0828–4000 mmol g –1) in terms of their textural and This report focusses on the modification of physical structure and chemical properties of a bentonite clay from the Hammam Boughrara region of the Maghnia district in western Algeria to maximize its adsorption capacity The purified bentonite clay (called B) was modified, either by acid activation with 1M sulfuric acid (BAct), or by intercalation Adsorption of Orange G Dye on Hydrophobic Activated Bentonite
According to Prof Gregg's concepts, the acid treatment of smectites or bentonites is an "acid activation", because it is used to adsorb the coloring matter dissolved in oil Also, the surface area is several times larger after the acidactivation, reaching values of 200 to 300 m 2 /g (13,14) in acidtreated claysSorption studies were carried out in a batch system using Cr(III) solution on nontreated and acidtreated whitecolored calciumbentonite (WCaB) WCaB, which has the highest cation exchange capacity (119 meq/100 g), was treated with 2 different acids (H2SO4 and HCl) at various concentrations The surface area was increased Investigation of Chromium (III) Adsorption on AcidTreated Bentonite
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 The results show that acid activation leached out the Ca 2+ and Mg 2+ ions and increased the porosity of bentonite, thus elevating the adsorption capacity to 149 mg/g Chinoune et al (2016 ) prepared Mg(OH) 2 coated bentonite and found it is efficient for adsorption treatment of reactive blue 2 and reactive blue 19Synergistic modification of bentonite by acid activation and
Acid activation was carried out by heating muds prepared from Carich bentonite (CaB), sulfuric acid (H 2 SO 4 ) and distilled water, yielding various bleaching earths (BEs)The TEM profile showed the basal spacing in layered structure of acidactivated bentonite was increasing compared to the natural bentonite The natural bentonite showed the characteristic(PDF) Synthesis and characterization of acidactivated bentonite
poor quality Bentonite [15] The acid activation induced a significant decrease of Fe 2 O 3 content from 656 to 568%; Methods in Science and Technology Vol 116, No 3, pp313314(2009)Bentonite processing technologymodification The surface modification of bentonite is to use physical, chemical, mechanical and other methods to change the surface structure, surface energy, electrical properties, adsorption performance and reactivity of bentonite, so as to improve the use value of bentonite Mechanical Bentonite processing technology ALPA Powder Equipment
Acid activation of bentonite clay using nitric acid was achieved in this study Enhanced morphology and physicochemical properties of pristine bentonite was observed Removal efficiency > 85% of recalcitrant heavy metals was obtained using modified bentonite Preoxidation of contaminated water using H 2 O 2 enhanced clean 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 Characterization of activated bentonite clay mineral and the
Bentonite clay was brought from El Fawakher village, Old Cairo, Egypt Sulfuric acid (H 2 SO 4) of 98% purity and lead nitrate were purchased from Qasr Al Aieny Street BMethods 1Activation Using Sulfuric Acid Reflux Method 10 gm of raw bentonite clay was mixed with various concentrations of sulfuric acid 25, 35, and 45% The reactants
