Natural Bentonite Research Articles

Comparative Study of the Physical and Chemical Properties of Natural Bentonite Clay of the Dash-Salakhli Deposit and Synthetic Montmorillonite

Comparative Study of the Physical and Chemical Properties of Natural Bentonite Clay of the Dash-Salakhli Deposit and Synthetic Montmorillonite

Preparation of Bi2O3/TiO2–Montmorillonite Nanocomposites and Their Applications to the Photodegradation of Pentachlorophenol

In the past decades, there has been a growing tendency to study the different techniques that can increase the photocatalytic efficiency as well as recyclability of new products “photocatalysts” for water treatment. In this last research the effect of bismuth addition to titanium was investigated. Bi/Ti-pillared montmorillonites have been prepared from natural Algerian bentonite exactly from deposits of Maghnia situated in the west side of the country. These nanocomposites were characterized by X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET), scanning electron microscopy (SEM) methods, and Fourier Transformed Infrared (FT-IR). The photocatalytic activities have been tested for the removal of pentaclorophenol (PCP) in water. The effect of preparation conditions, the pH of the solution and photocatalysts concentration, on these activities has been investigated. It was found that the photocatalytic degradation increase by addition of bismuth in pillaring process. The Mont-Bi-Ti is shown to be the best photocatalyst in term of photocatalytic activity. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Biodiesel production from waste cooking oil employing natural bentonite supported heterogeneous catalyst: Waste to biodiesel

Biodiesel production from waste cooking oil employing natural bentonite supported heterogeneous catalyst: Waste to biodiesel

Gels based on calcium alginate/pillared bentonite: structural characterization and their use as cadmium removal agent

In this work, calcium alginate hydrogels with natural and pillared bentonites (0.5 and 5% w/w) were synthetized in two geometries (disks and beads) and their capacity to adsorb cadmium ion from aqueous media was evaluated. Pillarization effect on bentonite morphology was evidenced by SEM, XRD, LD and BET isotherms. Structure and swelling capacity of hydrogels were determined, showing that hydrogels beads with pillared clays presented the higher ability to retain water. Regarding cadmium adsorption capacity, the effect of pH media (3, 5 and 7), the contact time (0 to 320 min.) and the initial cadmium ion concentration (6 to 42 mg/L) were studied employing hydrogel beads. Regardless bentonite type and concentration, the optimal pH cadmium adsorption was 7, reaching the highest adsorption capacity (93%) for hydrogel with 0.5% natural bentonite. Besides, the equilibrium adsorption time was reached at 120 min for all studied hydrogels and experimental data fitted with a pseudo-second order kinetic model.

Air and hydraulic flow characteristics of polymer amended bentonite based unsaturated GCLs

Geosynthetic clay liners (GCLs) are used in landfill applications because of their high deformation resistance and excellent self-healing ability. In the present study, air and hydraulic flow characteristics of natural bentonite based GCL (GCL-N) and polymer amended bentonite based GCL (GCL-A) were assessed using air permeability and hydraulic conductivity measurements. The airflow characteristics of GCLs were studied at various apparent degrees of saturation (Sa) and corresponding suction using a custom-designed air permeability test setup. The effect of desiccation on the airflow characteristics of GCL-A was also examined. Further, hydraulic flow characteristics of virgin and desiccated-rehydrated GCLs were assessed using a flexible wall permeameter. The water absorption capacity of GCL-A is relatively higher than GCL-N, irrespective of the stress state. For any chosen Sa, air permeability of GCL-A is lower than GCL-N. Moreover, with the decrease in the suction from 2500 kPa to 1000 kPa, the air permeability of virgin GCL-A has reduced from 9 × 10−12 m2 to 3.57 × 10−16 m2 while the desiccated-rehydrated GCL-A has reduced from 8.86 × 10−11 m2 to 1.9 × 10−13 m2. The hydraulic conductivity of GCL-A is two orders of magnitude less than GCL-N, which shows the better performance of GCL made with amended bentonite.

New stand-alone hygrometers based on the moisture-driven bending of a nanoclay and polyimide bilayer

Natural bentonite (BNT) nanoclay and a polyimide (PI) film were used to fabricate durable bilayer-type actuators driven by airborne moisture. The BNT/PI actuators, optimized for the layer thickness and dimensions, displayed a linear response over the relative humidity (RH) range of 4 – 92% with the curvature sensitivity of 0.35 cm−1%RH−1. It also showed good selectivity to moisture against common organic solvent vapors and excellent reproducibility for up to 200 consecutive operations. Systematic investigations on the materials properties for the individual layers revealed that the bending occurred upon the adsorption of water vapor because the BNT layer underwent greater volume expansion and loss of stiffness than the PI layer. These BNT/PI actuators were successfully applied to create three different prototypes of user-friendly, stand-alone hygrometers: a clock-like hygrometer, an emoticon-display hygrometer, and a humidity-switch-based LED hygrometer.

Enhanced inorganic salts stability using bentonite clay for high-performance and low-cost thermochemical energy storage

The energy storage density, cycling stability, thermal conductivity, cost, and corrosive behavior character of chloride-based hydrated salts are the worth challenges facing the application of these materials for thermal energy storage (TES). However, the impregnation of these salts into porous sorbent materials represents a key tool to deal with these issues. This paper aims to develop low-cost thermochemical composites (CTCMs) based on natural bentonite and hydrated salts for TES application. Natural bentonite blended with graphite (BNTC) was used as a support to stabilize three hydrated salts SrCl2·6H2O, CaCl2·6H2O, and LiCl.H2O. Synthesis and microstructural characterization of BNTC@CaCl2, BNTC@LiCl, and BNTC@SrCl2 were reported. Suitable operating conditions optimization during the hydration reaction of the CTCMs was studied using thermogravimetric analysis. A great storage density of 854.5, 704.2, and 778.6 kJ.kg−1 were measured for BNTC@CaCl2, BNTC@LiCl, and BNTC@SrCl2, respectively. Consecutive desorption/sorption cycles experiments were conducted and good cycling stability of the CTCMs was recorded which reflects the ability of the natural bentonite to solve the worrying issue of salts solution leakage. The compatibility of CTCMs in contact with copper heat exchanger metal was assessed and a new composite coating film based on polyvinylidene Fluoride reinforced with zinc oxide nanoparticles (PVDF@ZnO) was proposed. According to the gravimetric measurements of coated copper metal, an excellent enhancement of copper corrosion resistance up to 94% was achieved under the charging phase conditions of the CTCMs.

Impacts of the Floc and Sink technique on the phytoplankton community: A morpho-functional approach in eutrophic reservoir water

The Floc and Sink technique promotes, through the application of coagulants and clays, the removal of phosphorus and algal biomass from the water column by flocculation and sedimentation. Although it is a promising technique for mitigating harmful cyanobacterial blooms, little is known about the impacts on other phytoplankton species as well as it is not known how species with mechanisms of resistance to sedimentation respond to the application of these products. In this study, a laboratory experiment was carried out with water from a eutrophic reservoir to assess the impact of applying aluminum-based coagulants, aluminum sulfate and polyaluminium chloride, and chitosan, alone and combined with lanthanum modified bentonite and natural bentonite on the phytoplankton community, in a functional approach based on morphology (Morphology-Based Functional Groups – MBFG, Kruk et al., 2010 and Reynolds et al., 2014), with an emphasis on the characteristics that provide resistance to sedimentation. We tested two hypotheses: phytoplankton species with adaptive mechanisms that provide buoyancy to cells are more resistant to the removal from the water column by coagulants and clays; and coagulants based on metals and modified clays are more efficient in sedimentation of microalgal cells compared to natural products, regardless of the presence of an adaptive mechanism of resistance to sedimentation. Our results showed that aluminum sulfate and polyaluminium chloride alone or combined with lanthanum modified bentonite and natural bentonite effectively sedimented the cells, regardless of the presence of buoyancy mechanisms. In contrast, the natural coagulant chitosan alone or combined with lanthanum modified bentonite and natural bentonite removed only those species that were small-celled or small colonial without specialized structures or with the presence of spines, arms and siliceous exoskeleton. In the case of species with aerotopes and flagella, the removal was not effective and still caused an increase in algal biomass due to the formation of suspended cell aggregates on the surface of the water column of the experimental units. Therefore, we concluded that the Floc and Sink technique has an impact on the phytoplankton community because it removes from the water column species that are not the target of coagulants and clays, but that are considered important sources of energy in freshwater trophic webs. This result differs according to the type of product used as well as it is related to the morphological adaptations that favor the buoyancy of cells in the water column. Species with aerotopes and flagella are more resistant to sedimentation and may make the use of products applied in the Floc and Sink technique unfeasible. Nevertheless, these results represent only an immediate effect of the technique on the phytoplankton community, thus requiring a longer time scale evaluation to determine the algae that can effectively recover water column. Therefore, we also emphasize that algae of nutritional value can recover over time and make the long-term application of the technique acceptable.

Green synthesis of bentonite/cellulose@lead oxide bio-nanocomposite with assistance of Pistacia Atlantica extract for efficient photocatalytic degradation of ciprofloxacin

In this study, a novel bentonite/cellulose@lead oxide (BT-CL-PbO) bio-nanocomposite was synthesized via a green route. For this proposal, the extracted cellulose from barley waste and natural bentonite were bonded together by covalent bonding, and finally the biosynthesized lead oxide nanoparticles were immobilized on them. Then, due to the destructive impacts of antibiotic contaminants on the environment and ecosystem, the catalytic activity of nanocomposite was investigated for the photodegradation of ciprofloxacin. The BT-CL-PbO exhibited excellent catalytic activity over CIP degradation under sunlight. Effect of initial pH, ciprofloxacin concentration, BT-CL-PbO dosage, and the existence of anions on photocatalytic activity was studied. The photodegradation process of CIP fitted the pseudo-first-order kinetic model, and the rate constants in the presence of BT-CL-PbO reached 0.1309 min−1, which was about 2.3 times higher than that of bare PbO nanoparticles. The scavenging experiments confirmed that photoexcited holes (h+) played the prominent role in the photodegradation of CIP. The BT-CL-PbO showed high stability and reusability after three cycles of photodegradation. The obtained results found that the BT-CL-PbO is a cost-effective and recyclable photocatalyst for the photodegradation of CIP and can be used for the treatment of other pharmaceutical contaminants.

Sulfonated Nano-bentonit as Doping Material in Chtiosan/PVA membrane in Fuel cell Application

Electrolyte membrane of fuel cell is the main component that plays a role in separating the reactants and being a means of transporting hydrogen ions produced by the anode reaction to the cathode so that the reaction at the cathode produces electrical energy. Chitosan/PVA/Nanobentonite based membrane was made of natural bentonite form Karang Tengah, Bogor. The study was conducted to know the effect of particle size of doping materials added to chitosan/PVA membrane for fuel cell. The method used in the experiment was casting method with variation of concentration of sulfonated bentonite. Then, membranes were namely C/PVA/n-ben 0.3, 0.6 and 0.9. The membrane that had been synthesized was identified by swelling test, proton conductivity test and cation exchange capacity test then characterized by FTIR, SEM and XRD. The result of the experiment showed the best swelling test was presented on the membrane with concentration of 0.9% sulfonated bentonite by 62.79% and the best proton conductivity test was shown on a membrane with a concentration of 0.6% sulfonated bentonite which was 2.24 x 10-6 S/cm, supported by the result of the cation exchange capacity data.

Development of ceramic honeycomb monolith from natural zeolite tested as adsorbent to remove methylene blue in aqueous media.

This work presents a ceramic monolith with a honeycomb structure obtained from a natural zeolite (clinoptilolite), bentonite, and alumina. The monolith obtained by extrusion had a cell density of 57 CPSI (cells per square inch), an open frontal area of 52% w/w, and a wall thickness of 0.9 mm. The raw materials and the natural zeolite ceramic monolith (NZCM) were characterized by X-ray diffraction, N2 adsorption-desorption at 77 K, CO2 adsorption at 273 K, mercury intrusion-extrusion, axial compression tests, resistance to leaching at acidic and basic pH, and point of zero charge. The NZCM presented an SBET = 31 m2∙g-1, a modal micropore size of 0.44 nm, a porosity of 39%, the compressive stress = 14 MPa, and a pHPZC = 7.5. The NZCM was used as an inexpensive and easy-to-handle adsorbent to remove methylene blue (MB) dye in batch studies of kinetics and adsorption isotherms. From modeling of adsorption kinetic data, the predominant phenomenon in this system was physisorption. The modeling of adsorption isotherm data shows that the material has homogeneous active sites. The adsorption occurs by monolayer formation, finding a maximum capacity removal rate of 27 mg MB per gram of NZCM. Compared to other structured materials, a high capacity for removing MB with the ceramic monolith was obtained along with good mechanical properties and resistance in acidic and alkaline environments.

Sorption of the Main Dose-forming Radionuclides of Nuclear Power Plants Drain Water on Natural Bentonite in the Process of their Co-ozonation

The article presents the general pattern of the combined process of oxidative decomposition of organic components of simulated nuclear power plant (NPP) drain water and sorption interaction of the imitators of main dose-forming radionuclides (Cs – radiolabel for 137Cs; stable isotopes of Co, Sr, Mn salts) on natural bentonites from the Cherkasy deposit in presence of sorption-reagent compounds — iron (II) and manganese (II) salts. Hydroxides, oxyhydroxides and oxides of Fe and Mn formed during ozonation are predominantly localized on the surface of bentonite. The chemical composition of the main elements of bentonite after drain water ozonation with the addition of iron and manganese salts remains almost the same as that of natural bentonite. The phase composition of bentonite is presented by the main rock-forming mineral montmorillonite and secondary mineral quartz. The iron-containing phases of the ozonised bentonite are Fe(II)- Fe(III) layered double hydroxides (Green Rust), goethite α-FeOOH and magnetite Fe3O4, and the manganese-containing phases are hausemannite Mn3O4, manganese oxide (II) and manganese oxyhydroxide MnO(OH)2. The iron- and manganese-containing phases deposited on the bentonite surface during ozonation are predominantly weakly crystallized or amorphized structures. At the concentration of salts of iron (50 mg/dm3) and manganese (100 mg/dm3) in the drain water, the specific surface area of bentonites with the formed layer of iron and manganese hydroxides, (oxy)hydroxides and oxides increases compared to natural bentonite (34.2 m2/g) and equals to 55 and 51 m2/g, respectively. The degree of radionuclide removal during ozonationof the simulated solution with the initial concentration of cations (Fe2+ — 5 mg/dm3; Mn2+ —10 mg/dm3; Ca2+ — 5 mg/dm3) in the presence of natural bentonite is 137Cs — 78% ± 2%, Sr2+ —97.55% ± 1%, Co2+ — 96.5% ± 1%, Mn2+ — 99.7% ± 0.5%. To preserve the efficiency of 137Cs and Co2+ radionuclide removal, the initial concentration of cations in the solution can be increased to the following values: Fe2+ — 50 mg/dm3, Mn2+ — 100 mg/dm3, Ca2+ — 50 mg/dm3, and to: Fe2+ —500 mg/dm3, Mn2+ — 1,000 mg/dm3, Ca2+ — 500 mg/dm3 for Sr2+ and Mn2+ removal.

Feasibility of vanadium(IV) adsorption using natural bentonite: optimization, equilibrium and kinetics

Feasibility of vanadium(IV) adsorption using natural bentonite: optimization, equilibrium and kinetics

Evaluation method of thermal stability of bentonite for water-based drilling fluids

The quality of bentonite directly affects the safety and economic benefits of oil well drilling engineering. Due to the fact that most of the qualified drilling-grade bentonite used in water-based drilling fluid under current API standards are modified by physico-chemical methods, its performance maybe extremely unstable in high temperature conditions, which implies that the viscosity of drilling fluid will decrease or increase rapidly and may subsequently lead to downhole accidents. Therefore, China National Petroleum Corporation (CNPC) has proposed a new evaluation standard of bentonite Q/SY 17009-2019, which will be used to test the quality of high temperature stability through monitoring the performance of bentonite after aging at high temperature. For scientific evaluation and better understanding of this new standard, this paper focuses on researching several natural bentonite and industrial modified drilling-grade bentonite samples. Exploring their differences in performance after different aging condition under ambient temperature and high temperatures (120 °C, 150 °C and 180 °C). In addition, it also investigates the rationality of drilling-grade bentonite under CNPCs' new standard. The results shown that the crystallization characteristics of natural bentonite causes it to form a network lattice structure under high temperature, leading to an increase in suspension viscosity with increasing temperature. On the contrast, the performance of industrial drilling-grade bentonite after aging at high temperature is quite different, the viscosity of some samples increases greatly, while others decrease rapidly. By analysis of experimental data, it can be concluded that the new standard Q/SY 17009-2019 is more scientific and reasonable than the old standards API SPEC-13A-2010 concerning “drilling fluids material specification”. Through supplementing different grades of the performances after aging at high temperature, and then grading the bentonite, it is more suitable for the actual needs of drilling engineering, which could be considered as a more reasonable scheme to evaluate drilling-grade bentonite.

Аналіз результатів дослідження ступеня адсорбції іонів хрому(ІІІ) залежно від кількості бентоніту

The degree of adsorption of chromium(III) ions was analyzed depending on the amount of bentonite. Water pollution is the contamination of bodies of water such as lakes, rivers, oceans and groundwater by human activities. All water pollution affects the organisms and plants that live in them. Therefore, in almost all cases, the effect is such that it harms not only individual species and populations, but also natural biological communities. It occurs when pollutants are discharged directly or indirectly into water bodies without proper treatment and removal of harmful components. At the same time, the most relevant are adsorption cleaning methods, which are widely used for deep purification of wastewater, including from organic substances, such as phenols, herbicides, pesticides, aromatic nitro compounds, aromatic substances, dyes, etc. It has been proven that the use of bentonite as a sorbent allows replacing the stage of mechanical separation, which is one of the time-consuming stages of this process. A number of composite sorbents were obtained on the basis of bentonite, in particular, those with magnetic properties, in which a layer of Fe3O4 is deposited on the surface of the mineral. The problem of removing heavy metals from wastewater is particularly relevant now. Poorly treated wastewater flows into natural reservoirs, where heavy metals accumulate in water and bottom sediments, thus becoming a source of secondary pollution. Compounds of heavy metals spread relatively quickly throughout the water body. In the course of the study, it was found that with an increase in the mass of bentonite in the column, the adsorption efficiency increases for all concentration variants, and an increase in the effective volume indicator is also observed. Such research results indicate the choice of a sorbent layer of 20 g as a more successful option. With such sorbent consumption, the degree of purification of the model solution is 83.2 % (С0(Cr3+) = 0.5 g/dm3) at the lowest concentration of the pollutant and 70.2 % at the highest initial concentration of chromium ions in the solution (С0(Cr3+) = 2.0 g/dm3). So, the task is solved by the fact that in the method of wastewater treatment by the adsorption method, which consists in the purification of wastewater from heavy metal ions by absorbing them with a layer of sorbent, which is located in an ion-exchange filter, and the purification of wastewater is carried out in a layer of the natural mineral bentonite. Thus, water pollution is the contamination of bodies of water such as lakes, rivers, oceans, and groundwater by human activities. All water pollution affects the organisms and plants that live in them. Therefore, in almost all cases, the effect is such that it harms not only individual species and populations, but also natural biological communities.

INFLUENCE OF A HYDROPHOBIZER ON THE PROPERTIES OF EXPERIMENTAL BENTONITE-CONTAINING BIPOLAR MEMBRANES

Experimental samples of bipolar ion-exchange membranes were obtained by applying liquid sulfocation exchanger LF-4SK containing bentonite clays treated with stearic acid to an anion-exchange membrane-substrate with quaternary ammonium groups MA-41. The effect of the amount of added bentonite (1, 2, 3 wt%) on the characteristics of membranes was studied. Silicon and hydroxyl of the included bentonite accelerate the dissociation of water molecules, which leads to increasing the concentration of hydrogen and hydroxyl ions during bipolar electrodialysis. Surface modification of bentonite particles with stearic acid improves the dispersion of the clay in the polymer solution. The physico-mechanical characteristics of experimental ion-exchange membranes containing bentonite treated with stearic acid are compared with a membrane containing natural untreated bentonite. The total exchange capacity, density, moisture capacity, as well as tensile strength and relative elongation were determined. The injection of a hydrophobizer into the membrane leads to a decrease in moisture content, an increase in the total exchange capacity and density of the cation-exchange layer compared to a membrane containing bentonite in its original form. The conversion of sodium sulfate (concentration 0.5 mol/dm3) was carried out with experimental bipolar ion-exchange membranes. The use of a bipolar membrane containing bentonite treated with stearic acid (3%) in the cation-exchange layer leads to an increase in the productivity of the process and a decrease in energy costs compared to a commercially available heterogeneous ion-exchange membrane with similar functional groups and not containing catalytic additives. A scheme for obtaining experimental bipolar membranes is proposed, which consists of the following stages: preparation of bentonite; treatment of bentonitewith stearic acid; preparation of anion-exchange membrane-substrate MA-41; coating the membrane-substrate with of a cation-exchange layer.

Investigation of the adsorption characteristics of Pb(II) onto natural kaolinite and bentonite clays

Investigation of the adsorption characteristics of Pb(II) onto natural kaolinite and bentonite clays

Change of physico-chemical properties by mechanical activation of zeolites

The study (Navbakhor district of Navoi region) consists of the study of the properties of natural (mining) bentonite mineral raw material to its physical and chemical properties through mechanical activation. X-ray phase and X-ray spectral analysis of the composition of the layer montmorillonite was performed. Mechanical and chemical activation of zeolites to change the surface area and particle size was carried out using a high-power mill AGO-3 and a conical vibrating grinder VKMD-6. The dependence of the mechanical activation of layer montmorillonite on time over 20s, 40s, 80s and 160s proved that it increases the surface area. Using the Karman-Kozeni method, optimal regimes were determined by doubling the mechanical activation time and studying the density, sorption properties, and specific surface area of the zeolite.

The Improvement of Natural Thai Bentonite Modified with Cationic Surfactants on Hexavalent Chromium Adsorption from an Aqueous Solution

This work was performed to evaluate the adsorption properties of modified Thai bentonites (MTBs) on hexavalent chromium (Cr(VI)) by using a popularly capable surfactant (hexadecyltrimethylammonium bromide (HDTMA)) compared to an alternative surfactant (cetylpyridinium chloride (CPC)). The adsorption properties of the surfactant load, adsorbent weight, contact time, initial Cr(VI) concentration, and temperature of the MTBs were evaluated. The results revealed that a higher surfactant load significantly affected the Cr(VI) adsorption, and the equilibrium adsorption was achieved at 60 min. The adsorption capacity improved when the adsorbent weight, contact time, initial concentration, and temperature increased as the highest adsorption capacities of 1CPC and 1HDTMA were 45.55 and 46.03 mg g-1, respectively. The isotherm and kinetic adsorptions were described by the Freundlich model and pseudo-second-order model, respectively, while thermodynamics indicated endothermic adsorption. After adsorption, X-ray absorption near-edge structure and extended X-ray absorption fine structure data showed that Cr ions did not change the valency state between Cr(VI) and Cr(III). Additionally, the adsorption mechanism can be depicted as the ion exchange between the Cr(VI) ion and the surfactant molecule. Structural evaluations by XRD, FTIR, FESEM, EDS, and TEM found that both MTBs (1CPC and 1HDTMA) with the best adsorption performance for Cr(VI) had obvious changes at both the interlayer structure and the external surface. The interlayer spacing was expanded from 14.85 Å to 20.48 Å (1CPC) and 18.79 Å (1HDTMA), and the new functional groups (CH2 scissoring, C–H symmetric stretching, C–H asymmetric stretching, and N–CH3 scissoring) and elemental compositions (Br and Cl) were observed in both MTBs. They demonstrated that the complete intercalation of surfactant molecules on bentonite structures supported Cr(VI) adsorption. Overall, the data indicate that MTBs were perfectly adsorbed on Cr(VI), and CPC was demonstrated to be a cheap alternative agent due to its adsorption capacity compared to the popularly capable HDTMA.

Research of Na2CO3/C12H25SO4Na modified bentonite on high dispersion performance

The dispersion performance of drilling fluids at high temperatures has always been a bottleneck in the research. To improve the dispersion of drilling fluid at high temperature and pressure, the natural Ca-based bentonite was modified with Na2CO3 and SDBS (sodium dodecyl benzene sulfonate: C12H25SO4Na) by microwave semi-dry method. The effects of the ratio of Na2CO3 to SDBS, radiation time, initial temperature and microwave power on the modification were investigated. In addition, the microstructure of the samples was obtained using infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the results showed that Na2CO3/SDBS was successfully inserted into the bentonite. In addition, the dispersion performance of the modified bentonite was evaluated in this paper, and the gelling value of the modified bentonite was 525 ml/15 g with an apparent viscosity of 22.5 mPa·s. The modified bentonite was compared with drilling-grade Na-based bentonite. The fluid loss (FLHTHP) of modified bentonite at high temperature and pressure is only 8 mL, the mud productivity is up to 25.71 m3/t, and the kinetic plastic ratio of modified bentonite is 1.5. The modified bentonite has better dispersion performance at high temperature and pressure.