Adsorption Of Substances Research Articles

Fe-modified Eriobotrya japonica seed biochar for removal of methylene blue: Isotherms, thermodynamic, kinetic studies

In this study, biochar and magnetic biochar were used to remove methylene blue from the aqueous solution. This study also presents the preparation of biochar and magnetic biochar. Biochar and magnetic biochar used as adsorbent substances were obtained from loquat seeds (Eriobotrya japonica). The prepared adsorbent materials were characterized using SEM-EDS, BET, XRD and FT-IR. The effects of pH, time, amount of biochar and magnetic biochar, initial methylene blue (MnB) concentration and temperature were investigated. The sorption of MnB on biochar of Eriobotrya japonica seeds (b-ER) and iron-modified (mb-ER) is an endothermic process. R2 values, calculated and experimental adsorption capacity values were compared (R2 = 0.992 b-ER-MnB and R2=0.983 mb-ER-MnB) b-ER and for mb-ER the MnB adsorption process was found to fit the pseudo-second order-kinetic model. It was found to be more suitable for Langmuir adsorption isotherms when the adsorption isotherms were investigated. The maximum adsorption capacity was 40.650 ± 2.036 mg/g for b-ER-MnB and 81.697 ± 4.085 mg/g for mb-ER-MnB. According to the results obtained, mb-ER can be used effectively in the removal of methylene blue from aqueous solutions.

Removal of <i>para</i>-Phenylenediamine (PPD) Dye from Its Aqueous Solution by Adsorption Using the Activated Carbon Nanoparticles

This study focused on the development of an efficient preparation method of activated carbon for the removal of para-phenylenediamine (PPD) dye in an aqueous solution. Walnut shells, a readily accessible biomass source in northern Iraq, were processed into activated carbon (AC). Several techniques, such as FTIR, XRD, and SEM, were applied to describe and study the surface of AC. According to XRD analysis, all the reflection peaks with the relative intensities of various planes indicate that the obtained particle size was around 7.63 nm. The influences of contact time, adsorbent, and other variables (the thermodynamic parameters for the influence of temperature) were calculated after studying the dosage and initial concentration. The effects of the change in the acidity functions and the increasing temperature were also studied. The results found that the best adsorption occurred in 120 min, with a 0.1 g adsorbent substance weight and pH 5. The adsorption rate was at its best at a temperature of 318 K. The best-recorded adsorption rate was obtained when applying the Langmuir and Freundlich isotherms, and the adsorption processes were of a physical nature.

Investigation of Cephalexin Removal Using Biochar Derived from Nephelium lappaceum Seeds

<p class="MsoNormal" style="line-height:200%;margin-bottom:0cm;mso-layout-grid-align:none;text-align:justify;text-autospace:none;"><span style="font-family:"Times New Roman",serif;font-size:12.0pt;line-height:200%;" lang="EN-US">The improper disposal of drugs into bodies of water has become a severe environmental and health issue. Biochar synthesized from different agro residues could be a potential material for the adsorption of pollutants in aqueous environments. </span><em><i style="mso-bidi-font-style:normal;"><span style="font-family:"Times New Roman",serif;font-size:12.0pt;line-height:200%;" lang="EN-US">Nephelium lappaceum</span></i></em><span style="font-family:"Times New Roman",serif;font-size:12.0pt;line-height:200%;" lang="EN-US"> seeds were pyrolyzed at 600 °C in a pyrolysis reactor incorporating a slow pyrolysis process for carbonization. Fourier-Transform Infrared (FTIR), Scanning Electron Microscope (SEM), and X-ray diffraction (XRD) were used to characterize the biochar before and after adsorption of the pharmaceutical pollutant cephalexin. The effects of several factors, including initial cephalexin concentration, time of contact, dosage of adsorbent, and pH, were considered for the sorption. The findings showed that the Freundlich model offered the greatest fit for adsorption. The better-fitted kinetic model was the pseudo-second-order kinetic. Based on Langmuir isotherm model, the maximum adsorption capacity of cephalexin was obtained as 63.69 mg/g. The adsorption process involves hydrogen bonding, surface complexation, electrostatic and π−π EDA interactions. The current study offers a feasible and optimistic method for using agricultural waste and an alternative adsorbent substance for recovering highly concentrated cephalexin from water-based solutions.<o:p></o:p></span></p>

Methylene blue removal using nano-TiO2/MWCNT/Chitosan hydrogel composite beads in aqueous medium

Dyestuff, one of the most hazardous compounds in terms of threats to people and the environment, is found in wastewater from industrial usage. The removal of Methylene Blue (MB) from a water-based medium has been studied by numerous researchers using a variety of adsorbents. To remove MB from aqueous solution, nano-TiO2/MWCNT/Chitosan hydrogel composite beads (n-TiO2/MWCNT/Cht) were developed in this study using a sol-gel method. This research discusses the characterisation of a new adsorbent substance using Infrared Spectroscopy (FT-IR) analysis and scanning electron microscopy (SEM). The optimal pH, adsorbent dosage, duration, and starting concentration were ascertained by analyzing the removal efficiencies of MB using the batch adsorption method. Adsorption behaviour at the equilibrium state has been investigated using a variety of adsorption isotherms, including Freundlich, Langmuir, and Dubinin-Radushkevich. The Langmuir adsorption isotherm has been useful to clarify adsorption behaviors. nTiO2-Cht/MWCNT had an adsorption capacity of 80.65 mg/g for MB. The pseudo-second-order kinetic model offered the best agreement to the experimental data for the adsorption of MB. Kinetic models of pseudo-first-order and pseudo-second-order were employed to explore the adsorption processes of MB on the n-TiO2/MWCNT/Cht. This study demonstrated the efficiency of n-TiO2/MWCNT/Cht for the removal of MB from a water-based solution.

Synthesis and characterization of amine functionalized silylated clay for heavy metal adsorption: Thermodynamic and kinetic studies on Fe(III) ion

Amine functionalized bentonites were used as adsorbents for the bioremoval of Fe(III) ions, which led to the inclusion of functional groups such as -OH, -NH2, -OCH3, etc. FTIR, XRD, SEM, AFM, TG, BET, XRF, and CHNS analyzer were used to analyze the surface and textural characteristics. The influence of adsorption factors, such as pH, contact time, temperature, and initial concentration, have been investigated and tailored in batch adsorption experiments of Fe (III) metal ions. The maximum adsorption efficiency and capacity of modified BNT-APTMS is 100.90 % and 103.91 mg/g respectively. The adsorption process is best fit with Freundlich model (R2=0.998) than Langmuir model (R2=0.788) and the Temkin model D-R isotherm parameters indicating a physisorption process. A mechanism of spontaneous complexation was accomplished, because of the heterogeneity of the surface, electrostatic forces, pore filling, and π-π stacking. Follows PSO kinetics and favours Freundlich isotherm. The adsorbent substance showed a remarkable capacity for regeneration, assuring the substance's stability and reusability.

Prospects for pharmacological screening of oral detoxification drugs with differentiation of targeted pathologies in animal husbandry

In the modern livestock sector, the domestic industry of the North-West region, cases of poisoning of animals on farms and large complexes are increasingly occurring. This is primarily due to the intensive use of various synthetic modulators, growth stimulants, fertilizers in the agronomic industry and the excessive use of antibiotics, hormones and other veterinary drugs in animal husbandry.Pharmacological screening of oral detoxification agents with differentiation of target pathologies is a promising direction in the development of domestic animal husbandry. A reasonable choice of sorbents in each individual case of poisoning allows you to quickly achieve a therapeutic effect, reduce the toxic load on the animal’s body, which further ensures sustainable productivity and high quality products. This work highlights the results of some studies on the functional activity of the most common enterosorbents in relation to toxins of various natures.Based on the results of the study, it was noted that with an increase in pH from 2.0 (rennet model) to 7.5 (analogue of the distal small intestine), a release of part of the indicator substance from the pores of the sorbent (desorption) is observed, which reduces its absolute sorption effect [5] . The lowest desorption value was shown by atoxyl (8.5%) and phytopos (9.0%). That is why these drugs are the most effective oral detoxification agents for toxins with a molecular weight close to methylene blue.The maximum adsorption effect for various poisonings in animals can be achieved by using sorbing agents that are highly selective for a particular toxin. Research on the choice of oral detoxification agents with differentiation of target pathologies significantly expands the database on existing sorbents, makes it possible to prevent and treat poisonings of various types more effectively, and provides opportunities for the combined use of various adsorbent substances.

GRAPHENE OXIDE DERIVED FROM CASSAVA PEEL AS A POTENTIAL ADSORBENT FOR TETRACYCLINE REMOVAL FROM AQUEOUS ENVIRONMENT

Due to the increase in bacterial resistance, the presence of antibiotic residues in ambient water is becoming a serious problem. In order to stop antibiotic-related water contamination, graphene oxide has been extensively employed as an advanced adsorbent. In this study, cassava peel was utilized to create graphene oxide, which was then applied as an adsorbent to remove tetracycline. The modified Hummers technique was used to produce graphene oxide, along with an oxidizing agent. Studies have been done on graphene oxide characterization and adsorption process optimization. According to the study, tetracycline removal was best accomplished under settings that included an adsorbent mass of 20 mg, an antibiotic concentration of 10 ppm, a pH of 5, and a contact period of 10 minutes. The adsorbent substance has shown promise in removing tetracycline from aqueous environments.

Scalable production of wood carbon microspheres for high-efficiency carbon dioxide capture

Utilizing abundantly available biomass materials to prepare adsorbent substances is a simple and cost-effective method for CO2 adsorption, which, however, is often hampered by low adsorption capacity. Here, we demonstrate near-spherical active carbon (C-DWP/Zn) with high CO2 adsorption ability, employing delignification combination with ZnCl2 activation of natural wood powder. Removing lignin from wood cell walls facilitates easy absorption of Zn ions by the cellulose nanofibers (CNFs), thereby promoting micro/nano pores formation. Moreover, rapid dehydration of cellulose molecular chains alters the morphology of activated carbon, resulting in a transition from a granular to a near-spherical shape. Consequently, C-DWP/Zn with high specific surface area of 1769 m2 g−1, shows a significantly higher microporous volume than that of a control sample without delignification. The CO2 adsorption capacity of C-DWP/Zn, with values of 3.51 mmol g−1 and 5.12 mmol g−1 at 1 bar, 25 °C and 0 °C, respectively, is superior to that of commercial activated carbon. Attributable to its optimal micropore structure, C-DWP/Zn exhibits high CO2/N2 selectivity. Furthermore, the high carbon dioxide adsorption efficiency of C-DWP/Zn was maintained and the substance could be reused at least 20 times. Near-spherical active carbon adsorbents prepared from low-value wood powders, all featuring high CO2 adsorption performances, reasonable CO2/N2 selectivity, good recoverability, suitable heat of adsorption, and fast adsorption kinetics, which are promising candidates for practical CO2 adsorption.

Synthesis, characterization and adsorptive performances of functionalized clay minerals and red mud for aqueous arsenic removal

Water pollution due to elevated arsenic (As) levels is a very serious health issue worldwide. Employing adsorbent substances to remove As from an aqueous environment presents a viable solution to this pressing concern. The As adsorption behavior onto modified clay (kaolinite, bentonite) and red mud in aqueous media was investigated in this study. Specific surface area (SSA), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) studies confirmed successful modification of kaolinite, bentonite, and red mud through Fe-impregnate and dimethyl sulfoxide (DMSO)-intercalation. The incorporation of iron and DMSO improved the ability to remove As. The kinetic study showed that the adsorption equilibrium for both clay minerals and red mud products was reached within approximately 120 min, and the data fitted well to the simple Elovich, power function, and pseudo-second-order equation. Of all the products, Fe-Bentonite exhibited the highest As adsorption capacity, with a value of 581.2 μg g−1 (initial As concentration = 50 μg mL−1). Revealed in this study is that Fe-Bentonite, DMSO-Bentonite, and Fe-Red mud were the best-screened products for removing As from the aqueous system.

Adsorption of Methyl Red on porous activated carbon from agriculture waste: Characterization and response surface methodology optimization

Activated carbon is an internationally recognized adsorbent substance that removes contaminants from industrial discharges. In this study, we evaluate the capacity of Activated carbon produced by the chemical carbonization of Rosemary root, considered agricultural waste, by using phosphoric acid as an activator to adsorb Methyl Red (MR) from aqueous solutions. To identify the optimum conditions for the carbonization process, the effects of several factors on the removal of methyl red were examined. These parameters included carbonization time, temperature, phosphoric acid concentration, and contact time, with the help of experimental design. We found that 550 °C is the optimal temperature for carbonization of rosemary root, and the concentration of H3PO4 was discovered to be 5.5 mol/l. What about the times we determined for contact time and carbonization time, which were 30 min and 120 min, respectively. The resulting Activated Carbon of Rosemary Root (ACRR) material was then characterized using XRD, FTIR, Boehm titration, SEM/EDX, RAMAN, and Zeta potential. A batch system is used to perform our adsorption. In addition to pH effects, initial MR concentration, contact time, and masse effect were examined, and all the results were confirmed via experimental design using full factorial. In the present study, 15 mg of the adsorbent exhibited an adsorption capacity of 154.53 mg/g at pH 3.25 and a temperature of 328.15 k at a concentration of dye 50 mg/l. The adsorption results of methyl red onto ACRR powder showed that the adsorption process was best correlated with Freundlich isotherm and pseudo-second-order kinetic. According to the thermodynamic study, the system is exothermic. In order to understand the activated sites presented on MR and the mechanism of adsorption, density functional theory (DFT) using the B3LYP/6-311G base was used. Furthermore, the experimental results agree with the results of the computational model.

Designing an Oxygen Scavenger Multilayer System Including Volatile Organic Compound (VOC) Adsorbents for Potential Use in Food Packaging.

Oxygen scavengers are valuable active packaging systems because several types of food deterioration processes are initiated by oxygen. Although the incorporation of oxygen scavenger agents into the polymeric matrices has been the trend in recent years, the release of volatile organic compounds (VOC) as a result of the reaction between oxygen and oxygen scavenger substances is an issue to take into account. This is the case of an oxygen scavenger based on a trans-polyoctenamer rubber (TOR). In this work, the design of an oxygen scavenger multilayer system was carried out considering the selection of appropriate adsorbents of VOCs to the proposed layer structure. Firstly, the retention of some representative organic compounds by several adsorbent substances, such as zeolites, silicas, cyclodextrins and polymers, was studied in order to select those with the best performances. A hydrophilic silica and an odor-adsorbing agent based on zinc ricinoleate were the selected adsorbing agents. The principal VOCs released from TOR-containing films were carefully identified, and their retention first by the pure adsorbents, and then by polyethylene incorporated with the selected compounds was quantified. Detected concentrations decreased by 10- to 100-fold, depending on the VOC.

Lignocellulosic magnetic biochar with multiple functionality; A green chelating system for water purification

For the bioremoval of Fe(III) ions, an active magnetic filter media is synthesized by ultrasound centrifugation. By coprecipitation a magnetic nanoparticles was synthesized, it is then multi-functionalised with a chelating agent, Humic acid (HA), on to a microwave-assisted chemically activated powdered biochar of banana pseudo stem, (BPSC), results in an incorporation of functional groups like -COOH, -OH, -NH2. Textural and magnetic properties were analysed via FT-IR, XPS, BET, FESEM, AFM, TG, DTA, VSM, XRD and CHNS analyser. The adsorption capacity and efficiency of γ-BPSC/HA adsorption were 34.25 mg/g and 98.5%, respectively. By using XPS analysis, it was confirmed that the adsorbent's metal ions were bound to specific binding sites and had a specific capturing mechanism. A mechanism of spontaneous complexation was accomplished, because of the heterogeneity of the surface, electrostatic forces, pore filling, H-bonding, and π-π stacking. Follows PSO kinetics and favours Freundlich isotherm. The adsorbent substance shown a remarkable capacity for regeneration, assuring the substance's stability and reusability.

Removal of Methyl Blue from Aqueous Solution Using Magnetic Loquat (Eriobotrya japonica) Seed

Aims: In this study, biochar and magnetic biochar were obtained from loquat seeds. The obtained biochars were used to remove methyl blue from the aqueous solution.
 Study Design: The effects of adsorbent substance dosage, pH, initial methyl blue concentration, time and temperature on the adsorption process were investigated.
 Place and Duration of Study: Department of Chemistry, Graduate School of Applied and Natural Sciences, Süleyman Demirel University, between February 2022 and February 2023.
 Methodology: In this study, batch adsorption method, which is an easily applicable and common method, was used to remove dye from aqueous media. Modified loquat seeds were characterized by FTIR, BET analysis. The adsorption process was investigated in terms of kinetics, equilibrium and thermodynamics.
 Results: The maximum adsorption capacity was 31.746 mg/g for biochar and 67.568 mg/g for magnetic biochar. According to the kinetic data, the adsorption rate is pseudo-second-order. According to the thermodynamic data, negative ΔG values indicated that adsorption of methyl blue occurred spontaneously. According to negative ΔH values, the adsorption process was exothermic. When the adsorption isotherms were examined, it was seen that loquat biochar and modified loquat biochar were suitable for the Langmuir adsorption isotherm.
 Conclusion: Modified loquat seeds can be used to remove methyl blue dye from aqueous solutions. The adsorbents used can be modified with different chemicals to increase the adsorption capacity and contribute to the literature.

A Low Cost Material for Treatment Wastewater Contained Petroleum Pollution

One of the major problems facing the water environment is the pollution resulting from petroleum, refineries and oil industries which resulting a great danger to humans, aquatic organisms and water resources in the world. In this study, Conocarpus plant was employed as natural adsorbent substance which performed to reduce the concentration of contaminates exiting in the petroleum wastewater. The pollutants that have been removed are phenol, grease and oil. The laboratory experiments using Bach technique. Maximum efficacy of phenols removal was (83.694 %) at pH of (3.7). The highest efficacy of oil and grease removal (99.861 %) achieved at adsorbent mass of (15g), pH (9.77) and time of (120 min.). The Conocarpus plant has been shown to be effective in removing of pollutants (phenols, oil and grease) from wastewater. Efficacy of phenol removing progressed in increasing with adsorbent mass. The acidic pH value contributes greatly to increasing the efficiency of removal for both phenols, oils and grease. Maximum. amount of oil and grease adsorbed in solid phase was (17.369 mg/g). The results demonstrated that Conocarpus plant as natural adsorbent can be efficiently applied in refiners, grease and petroleum industry for eliminating pollution.

Observation of a solid phase under measuring the 3He diffusion coefficient in the nanopores of the MCM-41 adsorbent

Using nuclear magnetic resonance, the stimulated spin-echo method was applied to measure the diffusion coefficient in a 3He monolayer adsorbed inside cylindrical pores (channel diameter 25 Å) of a new-generation nanostructured adsorbent MCM-41. Helium was let into the sample in small portions, which made it possible to change in a controlled way the coverage of the walls of the cavities in the adsorbent. It is found that the measured dependence of the stimulated spin-echo amplitude on the square of the magnetic field gradient is exponential. The nature of this dependence made it possible to determine the diffusion coefficient in the adsorbed monolayer. The value of this coefficient turned out to be close to the diffusion coefficient in solid helium, which indicates that the first 3He monolayer on the inner surface of the cylindrical cavity is solid. This conclusion was confirmed when calculating the pressure acting on the helium monolayer due to the van der Waals forces from the adsorbent substance.

Use of different adsorbents in broiler diets naturally contaminated by mycotoxins

This study investigated the effects of adding different adsorbent substances to broilers feed naturally contaminated by mycotoxins. Two hundred and eighty male 1-day-old chicks, Cobb Slow® lineage, were distributed in a randomized block design with 4 treatments, 5 repetitions with 14 birds each. The treatments consisted of: T1- basal feed naturally contaminated with mycotoxins. T2- basal feed + Bentonite, Thistle Extract, Yeast Extract, Vitamin E and Choline. T3- basal feed + Bentonite, Thistle Extract, yeast cell wall and Silymarin. T4- basal feed + Bentonite and Algae extract. Performance (weight gain, feed intake, feed conversion) at 7, 14, 21, 28 days were evaluated. At 28 days, a portion of the jejunum was collected in two birds by replicate to study the intestinal morphology. The relative weight of the gizzard, proventricle and total intestine was evaluated. The data obtained were analyzed using the statistical program SAS (9.3). With the use of any adsorbents studied, the performance and liver weight were improved in all evaluated periods. Thus, the inclusion of adsorbents improves the performance of the broiler chickens when the feed is contaminated by mycotoxins.

Study of Isothermal, Kinetic and Thermodynamic Parameters of Adsorption of Glycolic Acid by a Mixture of Adsorbent Substance with ab-Initio Calculations

Study of Isothermal, Kinetic and Thermodynamic Parameters of Adsorption of Glycolic Acid by a Mixture of Adsorbent Substance with ab-Initio Calculations

Removal and Electrochemical Investigation of Congo Red Dye in Aqueous Solutions by Using Bentonite

Textile industry is a source of polluted water with many types of dyes., the Congo red tincture is among them. Putity of water can be noticeably affected by the presence of these dyes. Consequently, there must be an effective methods to remove dyes from water produced from the textile industry. Adsorption and many other methods were used to do the duty. In adsorption method, the cheap and affordable materials would be better. Bentonite is the one who have these qualities with a PH value of (2-10). The results showed that the change in weight of the adsorbent substance is about (0.25-2g). The changing of the initial focus within a range of (5-30 mg/l). The range of time periods is (30-240min). It was conducted that 240 min was the highest value of adsorption of Congored tincture on the Bentonite surface. The electrochemical behaviour of adsorption method of Congored dye with bentonite as a surface was monitored using the technology of cyclic voltammetry. The results illustrated that there was an increase in the oxidation process.

Preliminary Test of the Reduction Capacity for the Intestinal Adsorption of Skatole and Indole in Weaning Piglets by Pure and Coated Charcoal.

Simple SummaryTo suppress or prevent boar taint, many strategies are available, e.g., surgical or immunocastration or different housing and feeding conditions. In Germany, male piglets may no longer be castrated without anesthesia until the 7th day of life for animal welfare reasons. The aim of this study was to reduce skatole and indole, two of the boar taint-causing substances, by the feeding of charcoal. A fat coating applied on charcoal could delay the unspecific adsorption of charcoal until entry to the large intestine where skatole and indole should be adsorbed since the fat coating is digested during its passage through the small intestine. In total, 18 piglets were divided into three feeding groups and were fed for 19 days with the control feed or with the control feed plus 2% charcoal or plus 4% charcoal coated with a fat layer. The skatole and indole concentrations were analyzed in chyme retrieved from the colon and caecum as these substances need to be adsorbed by charcoal in the intestine to prevent resorption into the bloodstream and accumulation in fat. The reduction in skatole and indole contents underlines charcoal’s adsorption capacity. The adsorption capacity was higher when the charcoal was coated. As charcoal reduced skatole and indole, feeding trials with adult boars are needed to observe the status of boar taint substances at the day of slaughter.To reduce the risk of boar taint, intact male piglets are immuno- or surgically castrated. One alternative is reducing skatole by adding skatole reducing or adsorbing substances to the boars’ diet. Charcoal with a high capacity for adsorbing skatole and indole in vitro (tested before, data not shown) was fed to the boars to test the hypothesis that a fat coating prevents the unspecific adsorption of charcoal before entry into the large intestine while increasing skatole adsorption. Twelve male and six female weaning piglets with initial body weights of 7.74 ± 0.75 kg were fed for 18 (or 19) days with either 2% pure (untreated) charcoal or 4% coated (50% charcoal + 50% fat-coating) charcoal or no charcoal. After euthanasia, skatole and indole were quantified in caecum and colon chyme. Skatole and indole contents in caecum chyme were significantly lower (p < 0.05) in the group fed with coated charcoal (33 ± 4.2, 7 ± 2.8 µg/gDM, respectively) than in the group fed with pure charcoal (51 ± 7.3, 14 ± 3.0 µg/gDM) or with no charcoal (73 ± 12.6, 15 ± 1.7 µg/gDM). Similar effects were obvious for colon chyme. The results indicate that a fat coating of charcoal might prevent unspecific adsorption in the small intestine and might consequently lead to a higher adsorption capacity for skatole and indole in the large intestine, as skatole and indole concentrations in the chyme of caecum and colon were approximately 50% lower in the piglets who received coated charcoal.

Crystal Violet Removal Study with Natural and Biochar Prina from Aqueous Solutions

Crystal Violet is an inexpensive dyestuff used for silk, leather, paper dyeing and for many different purposes. In addition, culture staining is also frequently used in microbiology. It has a very dense and sticky dye. When the crystal violet dissolves in water, it significantly reduces the light transmittance and disrupts the natural environment balance. Adsorption is a method frequently used in the removal of such dyes. In this study, as an industrial waste, pirina was used as an adsorbent substance with its natural and thermally modified form. By using the pyrolysis method at 700 °C, biochar form of pirina was obtained. Natural and biochar pirina and crystal violet dye have been tried under different adsorption conditions. For this purpose, experiments were carried out at different pirina dosages, different initial dye concentrations and different contact times. The highest removal efficiencies are around 75% in natural pirina, while the biochar is around 98% in pirina. In addition, concentration studies performed against concentration were applied to the Langmuir and Freundlich isotherms and it was found that the adsorption was fit with the Freundlich model. The contact time removal studies were applied to pseudo-first order, pseudo-second order and intraparticle diffusion kinetic models, and adsorption was found to be fit with the pseudo-second order kinetic model. According to the results of the experiment, it was observed that the thermal treatment caused a great increase in the removal efficiency and it was found that it is an efficient adsorbent material that can be used to remove the crystal violet dye from the aqueous solutions.