Adsorbent For Removal Of Dyes Research Articles

Preparation of High-Performance Adsorbent From Low-Cost Agricultural Waste (Peanut Husk) Using Full Factorial Design: Application to Dye Removal

Dye pollution becomes one of the significant environmental concerns nowadays. The adsorption technique is a potent method for the removal of the dye from wastewater effluents. Conventional activated carbon is one of the best adsorbents for dye removal. However, it is constraint due to high cost, and problems with regeneration hamper large scale applications. The alternative method using low-cost adsorbent is being introduced to replace the activated carbon since they are available in large quantities, renewable and inexpensive. Hence, peanut husk (Canavalia Ensiformis) as absorbent was investigated for its potential in Malachite Green (MG) dye removal. The effects of dye concentration (25 and 100 mg/L), temperature (30 and 60 °C), and adsorbent dosage (25 and 100 mg) on MG dye removal percentage were designed and optimized using two levels full factorial design. Based on the optimization process, it was determined that the 25 mg/L of dye concentration, 60 °C of temperature, and 100mg of adsorbent dosage resulted in the highest removal efficiency of 84.85 % and 91.83 % for untreated and treated adsorbent, respectively. In conclusion, treated peanut husk has shown its great potential as low-cost adsorbent based on the removal efficiency.

Adsorptive removal of dye and antibiotic from water with functionalized zirconium-based metal organic framework and graphene oxide composite nanomaterial Uio-66-(OH)2/GO

Metal-organic framework (MOF) composite nanomaterials have attracted extensive attention in the field of environmental restoration owing to their modifiable pore size and functionalization of the framework. In this study, the novel adsorbent Uio-66-(OH)2/graphene oxide (GO) composite nanomaterial was synthesized via hydrothermal method using a functionalized zirconium-based MOFs and GO. Excellent adsorption properties of the Uio-66-(OH)2/GO were confirmed by the adsorption of two characteristic pollutants, methylene blue (MB) and tetracycline hydrochloride (TC). When the concentration of the solution was 20 mg/L, the adsorption efficiency of Uio-66-(OH)2/GO on these two pollutants reached 99.96% (MB) and 94.88% (TC), respectively. Meanwhile, MB adsorption by the Uio-66-(OH)2/GO was conducted to study the factors affecting the adsorption capacity during the adsorption process, including pH value, initial concentration and temperature of the MB solution. The isotherm had a good correlation with Freundlich isotherm model, which showed that the adsorption was monolayer adsorption and the adsorption surface was not homogenous. Kinetic studies showed that the adsorption was chemisorbed, and this also could be verified by thermodynamic analysis. The adsorption of MB by Uio-66-(OH)2/GO was completely spontaneous. These results demonstrated that the successful development of Uio-66-(OH)2/GO provides useful insights into the manufacture of MOFs-based water purification sorbents.

Template-Free Synthesis of N-Doped Porous Carbon Materials From Furfuryl Amine-Based Protic Salts.

Nitrogen-doped porous carbon materials (NPCMs) are usually obtained by carbonization of complicated nitrogen-containing polymers in the presence of template or physical/chemical activation of the as-synthesized carbon materials. Herein we reported the facile synthesis of NPCMs by direct carbonization of a series of furfuryl amine (FA)-based protic salts ([FA][X], X = NTf2, HSO4, H2PO4, CF3SO3, BF4, NO3, Cl) without any templates, tedious synthetic steps and other advanced techniques. The thermal decomposition of precursors and structure, elemental composition, surface atomic configuration, and porosity of carbons have been carefully investigated by thermogravimetric analysis (TGA), X-ray diffraction (XRD), Raman spectra, X-ray photoelectron spectroscopy (XPS), combustion elemental analysis, energy-dispersive spectrometry, and nitrogen isotherm adsorption. Different from the parent amine FA that was evaporated below 130°C and no carbon was finally obtained, it was found that all the prepared protic precursors yield NPCMs. These carbon materials were found to exhibit anion structure- dependent carbon yield, chemical composition, and porous structure. The obtained NPCMs can be further exploited as adsorbents for dye removal and decoloration. Among all NPCMs, [FA][H2PO4]-derived carbon owing to its high surface area and special pore structure exhibits the highest adsorption capacities toward both Methylene blue and Rhodamine B.

Processing and modification of hydrogel and its application in emerging contaminant adsorption and in catalyst immobilization: a review.

Due to the wonderful property of hydrogels, they can provide a platform for a wide range of applications. Recently, there is a growing research interest in the development of potential hydrogel adsorbents in wastewater treatment due to their adsorption ability toward aqueous pollutants. It is important to prepare such a hydrogel that possesses appropriate robustness, adsorption capacity, and adsorption efficiency to meet the need of water treatment. In order to improve the property of hydrogels, much effort has been made by researchers to modify hydrogels, among which incorporating inorganic components into the polymeric networks is the most common method, which can reduce the product cost and simplify the preparation procedure. Not only can hydrogel be applied as adsorbent, but it also can be used as matrix for catalyst immobilization. In this review, the key advancement on the preparation and modification of hydrogels is discussed, with special emphasis on the introduction of inorganic materials into polymeric networks and consequential changes in the properties of mechanical strength, swelling, and adsorption. Besides, hydrogels used as adsorbents for removal of dyes and inorganic pollutants have been widely explored, but their use for adsorbing emerging contaminants from aqueous solution has not received much attention. Thus, this review is mainly focused on hydrogels' application in removing emerging contaminants by adsorption. Furthermore, hydrogels can be also applied in immobilizing catalysts, such as enzyme and photocatalyst, to remove pollutants completely and avoid secondary pollution, so their progress as catalyst matrix is overviewed.

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Solution combustion synthesis of calcium aluminate (CaAl2O4) nanocomposite using coffee husk extract and its adsorption capacity for removal of Congo red (CR) and Indigo carmine (IC) are reported. Physiochemical properties of adsorbent were studied by PXRD, SEM, TEM and point of zero charge. Batch adsorption studies were conducted to study the effect of adsorbent dosage, pH, contact time, initial dye concentration and temperature on adsorption efficiency of coffee husk derived calcium aluminate nanocomposite (CHCA). Among the isotherms used, Langmuir model explained best the equilibrium data and the maximum monolayer adsorption capacity was found to be 377 and 135 mg/g for CR and IC, respectively. Mass transfer analysis indicated adsorptive removal of dyes was controlled by both external and internal diffusion. Pseudo-first-order model fitted best with experimental kinetic data and adsorption efficiency increased with an increase in the initial bulk concentration of CR and IC. Thermodynamic analysis indicated that adsorption of CR and IC on CHCA is feasible, spontaneous and exothermic in nature. The magnitude of enthalpy and heat of adsorption suggested that the adsorption is physical in nature. The present study explores the potential of coffee husk extract, an agro-based bio-waste, as a novel and eco-friendly fuel in the synthesis of CHCA and the synthesised nanocomposite as a potential adsorbent for the removal of synthetic dyes.

Hybrid sol–gel silica adsorbent material based on grape stalk applied to cationic dye removal

AbstractThe removal of azo‐dyes, recalcitrant compounds found in several industrial effluents, was investigated by an environmentally friendly hybrid adsorbent material based on grape stalk encapsulated by the sol–gel method. The winemaking process produces a large amount of grape stalk. This solid waste represents an environmental problem for wineries. The hybrid adsorbent based on grape stalk was synthetized by the acid catalyzed sol–gel route and characterized by different techniques. According to the zeta potential values, the resulting hybrid material is negatively charged at a wide pH range (2.0–12.0). The adsorption of the cationic azo‐dye Basic Blue 41 onto the hybrid material was evaluated in aqueous solution. The studies of pH (3.0–12.0), adsorbent concentration (0.5–5.0 g L−1), kinetic and adsorption equilibrium were investigated at 303 K. The kinetic data were best fitted to the pseudo‐second order kinetic model. Equilibrium studies showed that the hybrid material achieved a maximum adsorption capacity of 205.3 mg g−1. The large amount of solid waste generated from wine production represents a serious impasse for wineries regarding its storage and disposal, from both ecological and economical points of view. Alternatively, this agricultural solid waste may represent a source of raw material to create new products, increasing the life cycle and adding value to the previously discarded material. In this work, grape stalk was employed as adsorbent for dye removal, promoting the reduction of environmental contamination. The results showed that it is a promising material to use as efficient eco‐friendly adsorbent for the treatment of wastewater.

Efficient Adsorption of Acid Black 52 from Aqueous Solution by Biochar Prepared from Deoiled Algae Biomass: Process Optimization

The attempt was made to prepare the novel biochar (BC) from deoiled Spirulina platensis algae biomass (DB) which was obtained after single stage oil extraction and transesterification. The adsorption capacity of biochar for acid black 52 dye (AO) removal from individual aqueous solution was investigated. The optimization of process parameters such as effect of initial concentration of AO dye, dosage of adsorbent and the pH of the given solution on the dye adsorption was also examined. The results from the experiments were further compared with those obtained with commercially available activated carbon (AC). The results showed that with the rise in initial concentration of dye from 30 mg/l till 90 mg/l, there was rise in the percentage removal of dye from 86.67% to 89.84%. The percentage dye removal to some extent got improved from 86.60% to 87.80% using biochar while increasing the dosage of adsorbent from 0.2 to 1 g/100 ml. The removal of dye declined from 88.44% to 85.80% using BC while increasing pH from 2 to 10. From the results obtained, it can be concluded that biochar is a potential adsorbent for dye removal, thus supporting the sustainability of biodiesel from algae.

A review on adsorptive removal of dyes from wastewater by hydroxyapatite nanocomposites.

Dye removal from wastewater is of prominence due to its hostile effects on human health and the environment. The complex structure of the dye molecule is responsible for its difficulty in removal. Adsorption is found to be a promising technique to eliminate dye wastes due to its high removal capacity at low concentration. Among different adsorbents used, hydroxyapatite is a biocompatible adsorbent that is relatively efficient in both anionic and cationic dye removal. Recently, modification of hydroxyapatite by doping with other materials to increase its removal efficiency has gained much attention. This review summarizes compilation of recent literature on the removal of anionic and cationic dye by different hydroxyapatite nanocomposites, comparison of adsorption capacities of different hydroxyapatite nanocomposites, the possible adsorption mechanism of removal of dyes, the general isotherm, and kinetic and thermodynamic studies explaining the type of adsorption and the characteristics, advantages, and limitations of adsorbents.

Microcrystalline cellulose (MCC) based materials as emerging adsorbents for the removal of dyes and heavy metals - A review.

In an attempt to overcome such threats posed by water pollution, various processes ranging from physical, chemical as well as biological were applied to get rid of wastewater pollutants. The simplicity, high efficiency and cheapness of an adsorption process make it the most widely used among various other processes. Adsorbents with different properties were used in the adsorption process but this paper was focused on reviewing various articles published by numerous researchers on the isolation of microcrystalline cellulose (MCC), a popular carbohydrate polymer from lignocellulosic biomass and utilization of MCC based materials as effective adsorbents for the successful removal of dyes and heavy metals from synthetic wastewater. The sudden interest on MCC and MCC-based materials as adsorbents cannot be separated from their excellent properties such as renewability, biodegradability, biocompatibility, economic value, non-toxicity, high mechanical properties and surface area. Upon comparison with established adsorbents reported from literature, MCC-based materials performed excellently well in the adsorption of dyes and heavy metals with Langmuir isotherm and pseudo-second order reported mostly as the best fit models for the generated equilibrium and kinetic data, respectively pointing at the distribution of adsorption sites to be homogeneous as well as the formation of monolayer adsorbate on their surfaces. The various thermodynamic studies reported further revealed the adsorption processes of both dyes and heavy metals onto MCC-based materials to be entropy driven processes, spontaneous, and endothermic. Finally, future research was suggested to focus on optimization to enhance the performance of the MCC-based adsorbents, carrying out the adsorption on real wastewater instead of synthetic ones as well as expanding the range of adsorbates to include other contaminants such as chlorophenols, herbicides, pesticides and others in addition to dyes and heavy metals.

Superabsorbent magnetic Fe3O4-based starch-poly (acrylic acid) nanocomposite hydrogel for efficient removal of dyes and heavy metal ions from water

Aimed to removal of toxic dyes and heavy metal ions, the magnetic Fe3O4-based starch- poly (acrylic acid) nanocomposite hydrogel (Fe3O4@St-AcANCH) is designed and synthesized using free radical method. The main procedure for the synthesis of superabsorbent nanocomposite hydrogel is chemical crosslinking of starch and poly (acrylic acid). The as-prepared nanocomposite hydrogel present high removal percentage toward Cu(II), Pb (II), MV and CR solution through a spontaneous physic-sorption process that have a good consistence with pseudo-second-order and Langmuir isotherm models. It is indicated that nanocomposite hydrogel is an effective adsorbent for removal of dyes and metal ions which would provide a new platform for water and environmental considerations. Finally, the swelling properties and mechanical parameters of the prepared adsorbents were investigated preliminarily.

Synthesis of MnO2 Hollow Nanospheres through Selective Etching Method as an Effective Absorbent to Remove Methyl Orange from Aqueous Solution

The discharge of dye wastewater has become an unavoidable problem for human health and the environment. Developing an economical and rapid method to prepare effective adsorbents for selective removal of dyes is extremely urgent. In this work, MnO2 hollow nanospheres (MHNSs) were prepared through the selective etching method with the MnCO3 as the sacrificial template. The effect of the pH value, contact time, and initial concentration on the adsorption of methyl orange (MO) onto the MHNSs was systematically investigated. The unique mesoporous hollow structure and large BET surface area (43.74 m2/g) of MHNSs lead to an excellent adsorption capacity (1677.14 mg/g) at the optimal condition. Furthermore, the prepared MHNSs also showed great stability (90% removal rate after four cycles). The adsorption kinetics data fitted well with the pseudo-second-order kinetic model (R2>0.9997). The overall process was jointly controlled by external mass transfer and intraparticle diffusion, and intraparticle diffusion was the dominant factor. The adsorption isotherm results showed that the Freundlich model was more accurate to describe the experimental data than the Langmuir model. The thermodynamic analysis showed that the adsorption of MO on MHNSs was spontaneous and exothermic. Moreover, the calculated ΔG° and the XPS spectra showed that the process was mainly a physical process. It is expected that MHNS has a potential application for purifying dye wastewater due to its great adsorption performance and excellent stability.

Fabrication of lightweight and reusable salicylaldehyde functionalized chitosan as adsorbent for dye removal and its mechanism

Bio-resources have a very significant role in current research approach for the synthesis of benign functionalized biological macromolecules for their stable structural integrity and inherent nature-inspired potentialities. Here, chitosan is used as a core moiety for designing of a porous adsorbent after the attachment of salicylaldehyde to remove the toxic dyes. Salicylaldehyde linked chitosan, with excellent surface porosity, lightweight, non-glucose and low-cost feature, makes it as an efficient adsorbent. The dye loaded material is very easy to remove from the top of the water as it is suspended on water. The physico-chemical characterizations are done by FTIR, rheology, SEM and swelling study. The removal efficiency is 98% and 99% for Crystal Violet and Rose Bengal from water respectively. The thorough adsorption with mechanistic approach shows the Freundlich model as an appropriate one and follows closely pseudo-second-order kinetics model. Thermodynamic study reveals the endothermic nature of the process. Moreover, the reusability of Salicylaldehyde linked Chitosan shows its persistence with the same amount and concentration of dyes in water up to three consecutive cycles. So, the chitosan based macromolecules can be a sustainable candidate in the current scenario for the removal of dyes without the dislocation of the water container.

Novel diamino-functionalized fibrous silica submicro-spheres with a bimodal-micro-mesoporous network: Ultrasonic-assisted fabrication, characterization, and their application for superior uptake of Congo red

The practical removal of toxic organic dyes from water is vital for a safe, clean, and healthy environment. A key research challenge in the uptake of hazardous organic dyes is the design, development, and implementation of adsorbents with high affinity to achieve both improved uptake performance and fast adsorption kinetics for dye pollutants. In this work, fibrous silica submicro-spheres (KCC-1) were prepared by a facile ultrasonic-assisted hydrothermal protocol. Then, diamino-functionalized KCC-1 (DA-KCC-1) with micro-mesostructured fibers was prepared via a simple ultrasonic-assisted post-grafting method. As a potential environmentally silica-based material, DA-KCC-1 was used as an adsorbent for dye removal from water for the first time and Congo red was chosen as a model compound. Characterization studies revealed that both KCC-1 and DA-KCC-1 possess fibrous dendrimeric submicro-spheres morphology with a bimodal-micro-mesoporous architecture and high accessible surface area (up to 725 and 540 m2 g−1 for KCC-1 and DA-KCC-1, respectively). Some key experimental parameters affecting the adsorption efficiency (viz. initial pH value, adsorbent dose, initial dye concentration, etc.) were investigated and optimized. The maximum uptake capacity was found to be ~400 mg g−1 according to the Langmuir model. The findings can contribute to a better understanding of the adsorption properties of functionalized-fibrous KCC-1.

Nano activated carbon from industrial mine coal as adsorbents for removal of dye from simulated textile wastewater: operational parameters and mechanism study

Feasibility studies were conducted in the preparation of an effective activated carbon (AC) using the new raw Egyptian coal source called Maghara coal. Using this is eco-friendly, economical and highly available since it is a local and a natural material; thus, it was inspected for the removal of methylene blue (MB) dye from aqueous solutions. A very simple technique known as impregnation activated carbon with NaOH by chemical activation process was used. The most proper nano-activated carbon (NAC) was produced from carbonization of average particle size coal of 0.478 mm at 550 °C for 90 min. with 50% NaOH and ratio 35. The equilibrium data of MB onto the most effective prepared material was simulated using Langmuir and Freundlich isotherm models. Moreover, the adsorption mechanism of MB onto the prepared nano-activated carbon was suggested to take place as mono-layers adsorption on the homogenous active sites. The maximum mono-layers adsorption capacity was recorded as 28.09 mg/g. The morphological, chemical, and textural properties of the prepared NaOH activated carbon was investigated using TEM, Raman spectroscopy, FT-IR, and BET. Results indicated that the material was prepared at spherical shape with average diameter of 38 nm with high total pore volume of 0.183 cm3/g. The adsorption stability and reuseability of NAC was established using HCl as an eluent solution. The findings revealed the versatility of Maghara coal as a good precursor for the preparation of high quality, efficient and economical NAC.

Adsorptive Removal of Dyes from Aqueous Solution by KMnO4-Modified Rice Husk and Rice Straw

Rice husk (RH) and rice stalk (RS), the abundant biomasses, have been tentatively explored as the renewable biochar which were prepared by means of hydrothermal and activation processes, and the synthetic procedure is quite simple and easy to be scaled up for industrial applications. In this work, the removal of malachite green (MG) was investigated by KMnO4-treated RH and RS as the efficient adsorbents at various experimental conditions. Various operational parameters such as initial dye concentration, adsorbent dosage, and solution temperature in batch systems were investigated on the use of RH and RS. The adsorption isotherm model (Langmuir and Freundlich isotherms), kinetic model (pseudo-first-order, pseudo-second-order, and Elovich models), and the adsorption mechanism (intraparticle diffusion and Boyd models) were studied. It showed that that the Langmuir model and Elovich model are suitable for describing the adsorption process, and the diffusion rate of surface adsorption and the particle diffusion rate jointly affect the reaction rate of adsorption. This facile, efficient, and template-free synthesis strategy holds great promise for preparing novel porous biochar from renewable biomass resources for application in adsorbents.

Porous Carbon and Carbon/Metal Oxide Composites by Ice Templating and Subsequent Pyrolysis

There are continuously strong interests for the preparation of carbon and carbon composite materials because of their excellent properties and very broad applications. We report here the fabrication of porous carbon and carbon/metal oxide composites via an ice-templating approach and a carbonization process. Porous polymer and polymer/metal–organic framework (MOF) composites, namely poly(4-styrenesulfonate) and UiO-66 nanoparticles, are first prepared via a simple freeze-casting process. The material morphology and loading of MOF particles can be easily adjusted by varying initial suspension compositions during the freeze-casting process. These ice-templated materials are subsequently carbonized under Ar, producing carbon and carbon/ZrO2 composites with ice-templated macropores and micropores/mesopores. The carbonized materials are evaluated as adsorbents for dye removal from aqueous solution, exhibiting high performance in general for the adsorption of methylene blue, particularly achieving the high adsorption capacity of 96 mg g–1 (10 mg adsorbent/5 cm3 aqueous dye solution) with the porous carbon material.

Synthesis of organic hybrid super-microporous silicas as an adsorbent for dyes removal from water

Abstract Organic hybrid super-microporous silicas (OSMS) are prepared by using cetyltrimethylammonium bromide (CTAB) and cyclodextrin (CDs) as co-template with tetraethyl orthosilicate (TEOS) and γ-chloropropyltrimethoxysilane (CPTMS) as a silica source. In this strategy, the CDs molecules and CPTMS altered the self-assembly of CTAB with silica and directed the form of super-microporous materials. The obtained super-microporous material shows uniform pore size distributions around 1.5 nm and high surface area (463 m 2 g −1 ). This adsorbent exhibited a high adsorption capacity to Rhodamine B (RB) with 340 mg g −1 . Especially, the adsorption removal percentage of this material to RB is over 90% even in the high RB concentration solution (140 mg L −1 ) within 10 min.

Polyamine-modified magnetic graphene oxide surface: Feasible adsorbent for removal of dyes

Magnetic nanoparticles were integrated with graphene oxide sheets modified by metformin to introduce poly-amine functionality in structure. Modified magnetic graphene oxide by metformin (MMGO) adsorption ability was studied for removal of methyl violet (MV) and acid red 88 (AR88) at different pH, initial concentration, and contact time. The successful preparation of magnetic nanoparticles supported with modified graphene oxide sheets is evident from FTIR spectra, TGA, zeta-potential and magnetic measurements. Morphology and chemical structure of the prepared MMGO nanocomposite was studied by TEM, SEM, XPS and EDS analyses. Surface area measurement of the MMGO composite revealed high BET surface area of 226 m2 g−1. Equilibrium isotherms were employed to evaluate the experimental data and calculate the isotherms' parameters. Results showed that adsorption process is based on Langmuir isotherm (R2 > 0.99) and adsorption capacity of fabricated nano-composite was found to be 243 mg g−1 for MV and 303 mg g−1 for AR88. Kinetical results were based on pseudo-second order (R2 > 0.99) and physisorption was main process in the rate-controlling step.

Basic Blue Dye Adsorption from Water using Polyaniline/Magnetite(Fe3O4) Composites: Kinetic and Thermodynamic Aspects.

Owing to its exciting physicochemical properties and doping–dedoping chemistry, polyaniline (PANI) has emerged as a potential adsorbent for removal of dyes and heavy metals from aqueous solution. Herein, we report on the synthesis of PANI composites with magnetic oxide (Fe3O4) for efficient removal of Basic Blue 3 (BB3) dye from aqueous solution. PANI, Fe3O4, and their composites were characterized with several techniques and subsequently applied for adsorption of BB3. Effect of contact time, initial concentration of dye, pH, and ionic strength on adsorption behavior were systematically investigated. The data obtained were fitted into Langmuir, Frundlich, Dubbanin-Rudiskavich (D-R), and Tempkin adsorption isotherm models for evaluation of adsorption parameters. Langmuir isotherm fits closely to the adsorption data with R2 values of 0.9788, 0.9849, and 0.9985 for Fe3O4, PANI, and PANI/Fe3O4 composites, respectively. The maximum amount of dye adsorbed was 7.474, 47.977, and 78.13 mg/g for Fe3O4, PANI, and PANI/Fe3O4 composites, respectively. The enhanced adsorption capability of the composites is attributed to increase in surface area and pore volume of the hybrid materials. The adsorption followed pseudo second order kinetics with R2 values of 0.873, 0.979, and 0.999 for Fe3O4, PANI, and PANI/Fe3O4 composites, respectively. The activation energy, enthalpy, Gibbs free energy changes, and entropy changes were found to be 11.14, −32.84, −04.05, and −0.095 kJ/mol for Fe3O4, 11.97, −62.93, −07.78, and −0.18 kJ/mol for PANI and 09.94, −74.26, −10.63, and −0.210 kJ/mol for PANI/Fe3O4 respectively, which indicate the spontaneous and exothermic nature of the adsorption process.

Kinetics, thermodynamics, isotherm and regeneration analysis of chitosan modified pandan adsorbent

There has been increased interest of chitosan as a dye adsorbent. Nonetheless, the chitosan tends to form bonding between their monomer chains that result in a rigid structure which affects its capability for adsorption. This is prime reason many recent studies modified chitosan through various modifications. However, most modifications involve chemical additive agents as well as complex procedures that are conducted under strong condition. Not much research consider low-cost organic materials as modifying agent. The purpose of this work is to investigate the performance of chitosan modified with pandan leaves in the adsorption of reactive black 5 (RB5). Modified chitosan-pandan (MCP) adsorbent was synthesized by simple wet impregnation under mild conditions. The MCP was characterized using Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET) surface area analysis. Batch adsorption was conducted to study the effect of retention time (0–60 min), pH (3–11), initial dye concentration (100–1000 mg/L) and temperature (25–80 °C). Kinetics, isotherm, thermodynamics and regeneration evaluation were also performed on the adsorption data. The kinetics data obtained fitted well to the pseudo-second order model, indicating the role of chemisorption with the influence of intraparticle diffusion. For isotherm study, the data is best fitted to the Langmuir model (R2 = 0.91) with maximum adsorption of 169.49 mg/g. Thermodynamics analysis showed that the adsorption is feasible, endothermic and occurred spontaneously. MCP has been regenerated up to 5 times with percentage removal above 50% by washing with distilled water only. In conclusion, natural polyphenols from pandan leaves have been incorporated into chitosan to prepare high-efficiency adsorbent with satisfactory performance in RB5 removal from aqueous media. The MCP is a new promising biodegradable adsorbent for removal of dyes from textile wastewater.