Coconut Shell Carbon Research Articles

Seasonal evaluation of total organic carbon removal from river samples using scrap metal-based coagulant and local salt modified-biomaterials for point-of-use water treatment

ABSTRACT This study evaluated the potentials of activated carbon prepared from coconut shell (CS) (Cocos nucifera), counter wood (CW) (Afzelia africana) and iron (III) sulphate coagulant (ISC) prepared from scrap iron, in removing total organic carbons (TOCs) from contaminated Ebonyi river (EBRW) and Ezeiyiaku river samples (ERWA) at point – of – use (POU). A 250 ml of the river samples at ambient pH were mechanically (hands) batch – agitated with optimised doses of 0.5, 1.5, and 0.025 g of granulated activated coconut shell carbon (GACSC), granulated activated counter wood carbon (GACWC), and ISC at the two seasons. The results showed a 90 and 100% reduction in the TOCs of the treated ERWA and EBRW samples during the rainy season, while and at dry season, 88% reduction in TOCs was observed in both treated river samples.

A novel activation-hydrochar via hydrothermal carbonization and KOH activation of sewage sludge and coconut shell for biomass wastes: Preparation, characterization and adsorption properties

A two-stage method of hydrothermal carbonization and chemical activation technology was applied to prepare a novel, large surface area and rich-pore structure activation-hydrochar from sludge sewage and coconut shell due to its mild, low-cost, and well-developed merits. The pore-making mechanism of activation-hydrochar was discussed by FT-IR, XPS, SEM, TG, TG-MS, XRD, and BET characterization. These results illustrated that the first stage of hydrothermal carbonization achieved the rich-pore structure hydrochar via dehydration, decarboxylation, deamination, and rearrangement reactions. The subsequent KOH activation was conducive to the pore-forming process. Specifically, the pore structure of activation-hydrochar was ameliorated and abundant active adsorption sites were obtained by the modification. The adsorption properties of activation-hydrochar on Methylene Blue (MB) and Congo Red (CR) were systematically investigated, and the max adsorption capacities of those were obtained with 623.37 mg/g and 228.25 mg/g, respectively. The pseudo-second-order kinetics and Langmuir models were both fit to elucidate the adsorption process for both dyes. Thermodynamics revealed adsorption performance accompanied by the spontaneous and endothermic processes. In general, the research clearly indicated the synthesis route for activation-hydrochar, and its further adsorption performance, capacity, and mechanism on MB and CR. This research demonstrated that activation-hydrochar with the abundant surface area and rich-pore structure made it a candidate for the production of effective adsorption material. It is prospective to achieve the utilization of wastes and its further application in wastewater treatment.

Removal of Cr (III) from industrial wastewater using coconut shell carbon and limestone as adsorbent

Agricultural waste materials gained attention among researchers to study the effectiveness of adsorbent media in heavy metal treatment. In this study, application of coconut shell carbon and limestone as modified adsorbent was used to remove Cr (III) from industrial wastewater. Synthetic industrial wastewater sample containing 2 mg/L of Cr (III) was prepared using distilled water and standard solution of Cr (III). Batch adsorption study was conducted to determine the effect of varied contact time (0 to 120 minutes) and pH (pH3 to pH7). The result shows that at 60 minutes of contact hour, the removal of Cr (III) from the synthetic industrial wastewater is about 98% with optimum adsorption capacity is 0.000019 mg/g at 250 rpm of agitation speed in pH5 as optimum pH. The kinetic data obtained specified that the data follow closely the pseudo-second-order. Thus, this indicates that mixing coconut shell carbon and limestone as a modified adsorbent has a potential in reducing Cr (III) concentration in industrial wastewater.

Comparison study of COD and ammoniacal nitrogen adsorption on activated coconut shell carbon, green mussel (Perna viridis), zeolite and composite material in stabilized landfill leachate treatment

Comparison study of COD and ammoniacal nitrogen adsorption on activated coconut shell carbon, green mussel (Perna viridis), zeolite and composite material in stabilized landfill leachate treatment

Activated Carbon of Coconut Shell Modified TiO2 as a Batik Waste Treatment

Research about the modification of activated carbon of coconut shell with TiO2 as a waste treatment Batik has been done. The purpose of this study was to determine the effect of modified TiO2 on activated carbon characteristics and the effect of TiO2 concentration on the adsorption power of activated carbon in batik waste. The method utilized was activated carbon soaked in TiO2 with 5% and 10% concentrations in a ratio of 1: 5, then stirred with a magnetic stirrer for 2 hours. Next, the mixture was placed in an autoclave bottle and an oven (200°C for 30 minutes). The results were then washed with distilled water and dried (100°C for 5 hours), then the material was characterized by FTIR, XRD, SEM-EDX, and application to batik waste. FTIR results indicated the presence of Ti-O-Ti groups after modification at wave number 682 cm-1, XRD indicated the presence of a combination of amorphous KA and crystalline TiO2 at 25,2°; 37,7°; 48,1°; 53,8°; and 55°, and SEM results of TiO2 agglomeration on the surface of the railroad. Adsorption of batik waste showed KATiO2-10 (0,052) lower than KA (0,059) and KATiO2-5 (0,057), as well as the presence of COD KA results = 705,6 mg / L (pH = 8), KATiO2-5 = 504,0 mg / L (pH pH = 7) and KATiO2-10= 403,2 mg / L (pH = 7). Based on this research, the activated carbon modified TiO2 can be used as a material for processing batik waste with the most significant concentration of TiO2 represent 10%.

Tribo-Mechanical characterization of carbonized coconut shell micro particle reinforced with Cissus quadrangularis stem fiber/epoxy novel composite for structural application

ABSTRACT In this article, mechanical and tribological characterization of Cissus quadrangularis stem fiber (CQSF)/epoxy resin particulate with and without coconut shell ash (CSA) powder was carried out. The materials were fabricated by the hand lay-up method. Epoxy and 30 wt.% CQSF with 40 mm fiber length were taken to fabricate the base material, and CSA was separately added at 2.5, 5, 7.5, and 10 wt.%. In this way, five materials were fabricated for mechanical and tribological investigation. The tribological characterization was analyzed by Response Surface Methodology (RSM) using Design-Expert software, and pin-on-disc wear testing machine was used to calculate the specific wear rate of the materials under different experimental conditions. A design table was created for four factors and three levels using full factorial central composite design. The maximum tensile (110.31 MPa) and flexural (136.11 MPa) strength obtained at 5 wt.% CSA addition and after that reduced. The maximum hardness (98 HRRW) and impact strength (20.03 J/cm2) were obtained at 10 wt.% CSA particulate-filled CQSF/epoxy composite. CQSF/epoxy with 5.9 wt.% CSA filler yielded better specific wear rate (6.67 × 10−5 mm3/Nm) compared with other compositions, which was found in the RSM technique. Scanning electron microscopy (SEM) images were taken to identify failure mechanisms for the specimen.

Utilization of Adsorbent Carbon Coconut Shell for Purification of Used Cooking Oil

Cooking oil is one of the primary commodities people need to process food. Repeated use of cooking oil at high-temperature heating produces foul smell that reduces the quality and nutritional value of fried food. Decomposition consists of negative affects quality, but it also results in unfavorable flavor and reduced nutritional value of fried food. An alternative method to treat used cooking oil is adsorption with carbon made of coconut shells. This research aims to lower the levels of acid and peroxide numbers of used cooking oil by purifying it with activated carbon. The acid number determined using the acidimetric and alkalimetric titration method, while the peroxide number measured using the iodometric titration method. These two methods used to analyze samples of fresh cooking oil, used cooking oil, and used cooking oil treated with activated carbon. Results showed a decrease in acid number 34.1449% the second, 29.4103% the fourth use, and 37.5092% on the sixth use of cooking oil. Meanwhile, acidity reduced by 34.1508% the second use, 29.3883% the fourth use, and 37.5066% the sixth use of cooking oil. It found that peroxide number experienced a decrease in 81.2836% the second use, 85.3674% the fourth use, and 62.2462% the sixth use of purified cooking oil.

KINETIC STUDY ON THE REMOVAL OF BTX COMPOUNDS IN BATCH REACTOR USING ACTIVATED CARBON FROM COCONUT SHELL AS THE ADSORBENT

A cinética de adsorção dos compostos BTX (benzeno, tolueno, o-xileno) em solução aquosa foi investigada em um reator em batelada a 23 ±1°C usando carvão de casca de coco ativado termicamente comercial, como adsorvente. O pH da solução não afetou a adsorção e a ativação térmica do adsorvente produziu uma maior quantidade de cargas negativas na superfície, aumentando a eficiência de adsorção, devido às cargas das moléculas dos BTX serem fracamente positivas. Para determinar o mecanismo e a etapa limitante do processo de adsorção, os dados cinéticos foram ajustados usando diferentes modelos: modelos de pseudo-primeira ordem, pseudo-segunda ordem e difusão intrapartícula. O modelo de pseudo-segunda ordem foi o mais apropriado para descrever a taxa de adsorção com base no alto coeficiente de correlação (R2) e porque o qe calculado utilizando o modelo de pseudo-segunda ordem foi razoavelmente semelhante aos valores experimentais. Através de um estudo detalhado envolvendo os experimentos cinéticos, também foi possível identificar o estágio controlador do processo a partir do ajuste do modelo de difusão intrapartícula. Os valores elevados para os coeficientes de correlação indicaram que o processo é fortemente controlado pelo segundo estágio da difusão para todos os compostos estudados em diferentes concentrações.

Optimization of adsorption parameters of activated carbon modified with the oxidizing agent on adsorptive removal of toluene using response surface methodology (RSM)

Commercial activated carbon of coconut shell has been oxidized with nitric acid, and their oxygen surface complexes have been characterized by classical titration following Boehm’s method and by FTIR. The surface areas of both the original and oxidized activated carbon were obtained 814 m2 g−1 and 626 m2 g−1 with an average micropore volume of 1.67 and 1.79 cm3 g−1, respectively. A comparative study on the toluene adsorption revealed that the oxidized activated carbon showed better toluene adsorption. The adsorption capacity of toluene was enhanced dramatically by oxidation of the activated carbon. The highest adsorption and breakthrough times of the functionalized (FAC) and nonfunctionalized activated carbon (NFAC) were 110.39 mg g−1, 67.18 min, and 65.38 mg g−1, 32.29 min, respectively. An adsorbent mass of 60 mg, the flow rate of 90 mL min−1, toluene concentration of 500 ppm, the humidity of 30%, and temperature of 26 °C was found to be the optimum conditions for the maximum adsorption capacity of toluene of 112.11 mg g−1 by the FAC in a dynamic adsorption system. The FAC obtains an adsorption capacity of 71.28 mg g−1 in the third cycle, which is about 65% of the preliminary values. Due to the high adsorption capacity of the FAC in the adsorption of toluene and proper reusability and stability, it can be used as a suitable and economical adsorbent.

Synthesis 1,1-Dibutoxybutane from Single Reagent of <i>n</i>-Butanol Using Cr/Activated Carbon Catalyst

Synthesis of 1,1-dibutoxybutane from the single reagent of n-butanol using Cr/Activated Carbon (Cr/AC) as a catalyst has been done. The aims of this research were to evaluate the effect of temperature, amount of catalyst, and alcohol flow rate towards the yield of 1,1-dibutoxybutane. Activated carbon (AC) was prepared by activating coconut shell carbon at 650 °C in the atmosphere of H2 at a flow rate of 15 mL/min for 4 h, and then it was washed using acetone in a Soxhlet for 15 rounds, washed 3 times by 1.0 M HCl, and finally, it was sieved at 60–80 mesh. Metal content was analyzed using atomic absorption spectroscopy (AAS) of Na, Ca, and Fe. The AC was impregnated with Cr(VI) solution and reduced with H2 at 650 °C. The acidity of Cr/AC catalyst was determined by the adsorption of ammonia vapor. Optimization of n-butanol conversion to 1,1-dibutoxybutane using Cr/AC catalyst was conducted in an oven using variations of temperature of 450, 500, and 550 °C, catalyst amount of 5, 10, and 15 g, under an alcohol flow rate of 0.10, 0.50, and 0.90 mL/min. The conversions of 1,1-dibutoxybutane were analyzed by GC-MS and 1H-NMR. The results showed that after washing by acetone and 1.0 M HCl, the content of metals in the AC was significantly decreased. The AC and Cr/AC showed acidity of 2.49 and 8.27 mmol/g, respectively. The highest product of 1,1-dibutoxybutane (53.42%) was reached at 450 °C using 5 g catalyst of Cr/AC under the alcohol flow rate of 0.10 mL/min.

Mussel-inspired polydopamine functionalized recyclable coconut shell derived carbon nanocomposites for efficient adsorption of methylene blue

Relatively cheap or at no cost, easily available, renewable agricultural waste has been given a new purpose. Using coconut shells as the raw material, and being obtained from agricultural, industry by-products, or even waste materials were used as carbon resource. Acid etching coconut shells carbon (AC) rendered micro/nanoscale hierarchical structures and made the surface available for further modification. Then, the surface of acidified coconut shell carbon was engineered via mussel inspired chemistry. The polydopamine functionalized AC composites (AC-PDA) were applied for efficient removal of methylene blue (MB) dye. Further, the surface morphology, and chemical structure were evaluated by means of scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR). Through the combination of acid etching and mussel inspired chemistry, organic functional groups can be successfully introduced onto the surface of the coconut shells carbon. The improvement of adsorption capacity of AC-PDA compared with AC is probably due to the increased number of active binding sites resulting from surface modification and formation of new functional groups.

Review: penjernihan minyak goreng bekas menggunakan berbagai jenis adsorben alami

Abstrak
 Minyak goreng yang digunakan secara berulang pada temperatur tinggi akan menyebabkan penurunan mutu dan nilai gizi pada makanan yang digoreng. Penggunakan minyak secara berulang juga akan berdampak buruk bagi kesehatan. Perbaikan kualitas minyak goreng dapat dilakukan dengan berbagai cara sehingga minyak dapat digunakan kembali secara aman. Perbaikan kualitas dapat dilakukan dengan cara pemurnian dengan menggunakan sejumlah adsorben. Pemurnian minyak goreng bekas secara adsorpsi menggunakan berbagai adsorben dengan berbagai variasi suhu dan waktu kontak telah dipelajari. Proses adsorpsi dilakukan pada minyak goreng bekas yang dikontakkan dengan sejumlah adsorben. Mahalnya harga adsorben kimia membuat para peneliti mengembangkan adsorben alami yang berasal dari limbah pertanian. Terdapat beberapa limbah pertanian yang memiliki potensi sebagai adsorben. Limbah pertanian yang dapat digunakan sebagai adsorben dalam adsorpsi minyak goreng bekas yaitu seperti karbon aktif dari tempurung kelapa, karbon aktif dari tandan kosong kelapa sawit, karbon aktif dari kulit sukun, bentonit, mengkudu, arang aktif dari kulit pisang kepok, arang aktif dari biji kelor, arang aktif biji salak, arang aktif dari ampas tebu, adsorben dari pati aren, dan biji alpukat. Kapasitas adsorpsi dari beberapa jenis adsorben berbeda-beda bergantung pada struktur, konsentrasi adsorbat, jumlah adsorben, tingkat keasaman, kondisi operasi, dan waktu kontak.

Highly efficient removal of diazinon pesticide from aqueous solutions by using coconut shell-modified biochar

This study evaluates the adsorption of diazinon from aqueous solutions onto coconut shell-modified biochar using a batch system. The amount of dosage and initial pH are the main parameters being studied to obtain maximum adsorption capacity of the probe molecules. The carbonized coconut shell biochar (BC1), activated coconut shell biochar (BC2), chemically modified phosphoric acid (BC3) and sodium hydroxide coconut shell biochar (BC4) were prepared and tested as variables in the adsorption experiment. The characteristic of biochar via SEM, EDX and BET analysis revealed the large porous of surface morphology and slight changes in the composition with high surface area (405.97 – 508.07 m2/g) by following the sequence of BC3 > BC2 > BC4. Diazinon removal percentage as high as 98.96% was achieved at pH 7 with BC3 as adsorbent dosing at 5.0 g/L. The high coefficient of determination, R2 with a small value of ERRSQ and χ2 error analysis present the BC1 (0.9971) and BC2 (0.9999) are best fitted with Freundlich isotherm indicates multilayer sorption onto heterogeneous surface whereby the Langmuir isotherm model is the best fitting is described of monolayer adsorption process onto the homogenous surface of BC3 and BC4. The results indicated the maximum adsorption capacity (qm) was achieved by BC3 with 10.33 mg/g, followed by BC2 (9.65 mg/g) in accordance to the Langmuir isotherm while Freundlich isotherm showed the highest adsorption capacity (kF) with 1.73 mg/g (L/mg)1/n followed by BC4 with 0.63 mg/g (L/mg)1/n at favorable adsorption isotherm (1 ≤ n ≤ 10). Thus, the results obtained depicted that BC2 and BC3 are highly efficient adsorbents and both exhibit great potential in removing diazinon from aqueous solutions.

Mechanical Characterisation of Carbon-Silica Reinforced Composites for Turbine Application

Materials selection and development for application in advanced systems is becoming highly complex involving the need for lower cost alternatives without compromising service performance. This paper investigated selected critical mechanical properties of ceramic matrix composites synthesized from coconut shell carbon (CSC) reinforced with silica particles (SP). Coconut shells (CCS) and silica sand (SS) were pulverized separately in a plate mill and a ball mill respectively to obtain a particle size of 250 μm. The CCS powders were calcined at 5000 C in an oven to obtain coconut shell ash (CSA) which was carbonized in a furnace from 5000 C-10000 C under argon gas controlled environment. The materials were mechanically blended while the SP additions varied from 10-40 wt. % and compacted using hydraulic press. The compacted mixture was sintered at 5000 C-12000 C, held for 2 hrs and the composites characterised for mechanical properties while the microstructural integrity was analysed using scanning electron microscope/energy dispersive x-ray spectroscopy (SEM/EDS). Microstructure showed that after sintering, coconut shell carbon developed strong cohesion with the silica particles which gave rise to effective load transfer. The mechanical properties that ensued demonstrated on the average 52.8 % comparability with conventional power plant structural materials in terms of hardness, compressive strength and impact energy.

Degradation of surfactant waste of leather tanning using Fe2O3/activated carbon catalyst

The development of the tannery industry in addition to being beneficial for the economic growth of the community also has a negative impact on the environment due to the disposal of waste produced. Components of waste produced from the leather tanning industry include residual protein and fat, surfactants, anti-bacterial, anti-fungal, coloring and tanning agents. One component that is found in surfactants and often pollutes waters is alkyl benzene sulfonate and linear alkyl benzene sulfonate surfactants. Alkyl benzene sulfonate (ABS) is an anionic surfactant that has a very long and branched carbon chain that is difficult to degrade by microorganisms in nature. Characterization and testing of the activity of porous/activated carbon catalysts will be carried out. The type of porous activated carbon used is coconut shell carbon with microspores character. The stages of this research consisted of the process of impregnation of iron oxide on porous carbon, the surfactant waste degradation process and the characterization of the catalysts produced. Based on the research that has been done, it can be concluded that the catalyst Fe2O3/coconut shell activated carbon is very effective to be applied for the degradation of surfactant waste. The degradation capacity of surfactant wastes increases with increasing concentration of active site Fe. The capacity of the surfactant waste degradation reaction using coconut shell catalyst at t = 3 hours for variations in the concentration of Fe 2%, 4% and 6% respectively 6.77 mmol/gram catalyst, 3.18 mmol/gram catalyst and 1.61 mmol/gram catalyst. The data show that the surfactant waste degradation reaction capacity increases with the increase in the composition of iron oxide added to the surface of the porous carbon support.

Removal of Hardness using Coconut Shell Carbon

Water contamination is an ongoing issue around the world, especially for poor people, who mostly depend on ground water as their source of drinking water. Coconut shells can be used as a material for softening as it is an easily available source of activated carbon. It is proved that it can make water safe and improve the taste of it by adsorbing heavy metals and toxic organic chemicals like pesticides. Coconut shell carbon (CSC) can also remove odor and turbidity of by removing certain suspended and dissolved solids. The present study aims to remove hardness present in water using coconut shell powder. Batch experiments were carried using varying concentrations of adsorbent dose at different contact time in order to reduce hardness present in the water sample. Optimum adsorbent dosage and optimum contact time were determined for maximum removal efficiency. This project succeeds by developing a low cost user friendly water treatment technique to rural people who faces the problem with hard water using locally available waste material like coconut shell.

Utilization of activated carbon from coconut shell in remediating heavy metal waste in soil around mining area

Soil contamination by liquid waste that containing heavy metals in Jendi Village, Selogiri Sub-District, Wonogiri Regency has occurred for a long time. This situation is affected by the Traditional Gold Mining activity in that region. To overcome this problem, the authors utilize activated carbon from coconut shell as an easy, effective and environmentally friendly remediation method. In this research, activated carbon is believed can adsorb heavy metal waste around the gold mine area. This research was conducted from August 9, 2017 - December 28, 2017 by taking samples of waste in the gold mine area and applying 200 ml of the waste to a soil miniature. Parameters observed were Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS). The results show that the existence of heavy metal in soil is decreasing. So, the activated coconut shell carbon effectively in remediating soil that contaminated heavy metal waste.

Influence of filler loading on the mechanical and morphological properties of carbonized coconut shell particles reinforced polypropylene composites

The high cost of mineral-based fillers and their processing difficulties have necessitated the search for alternative and cheaper filler materials, usually agro-waste materials such as coconut shells. The coconut shells were carbonized, pulverized, and sieved into four particles sizes, namely; 63 μm, 150 μm, 300 μm, and 425 μm. The carbonized coconut shell particles of each particle size were used as fillers in the preparation of polypropylene-filled composites at filler loadings of 0, 10, 20, 30, and 40 wt. %. The control was the neat polypropylene of 0% filler addition. The polypropylene/carbonized coconut shell particles composites were prepared via melt blending of polypropylene and the filler in an injection molding machine to obtain composite sheets. The influence of filler loading on the mechanical properties was evaluated. The addition of fillers was found to improve the yield strength, tensile strength, tensile modulus, flexural strength, flexural modulus, and hardness of polypropylene as these mechanical properties increased with increase in filler loading. The elongation at break and modulus of resilience of the prepared polypropylene/carbonized coconut shell particles composites were, however, observed to decline with an increase in the filler loading. Compared with the neat polypropylene, the filler showed enhanced mechanical properties in the prepared composites. SEM revealed good filler–matrix interaction because of good interfacial adhesion. The incorporation of more filler resulted in the formation of more spherulite-producing nuclei, reduction of pore sizes, and enhanced particle size distribution with improved mechanical properties. Experimental data modeling showed the addition of more than 48% carbonized coconut shell particles to polypropylene would compromise property enhancement.

Production of Liquid Smoke From the Process of Carbonization of Durian Skin Biomass, Coconut Shell and Palm Shell for Preservation of Tilapia Fish

The Liquid smoke can be use for food preservation, be obtained from pyrolysis of materials containing cellulose, hemicellulose, and lignin. The form of liquid smoke that has the ability to preserve,for their phenolic compounds,acids and carbonyl. The purpose of this research is to know the quality of liquid smoke from process of charcoal the biomass obtained from rotary pyrolysis carbonisator as fish preservative, the effect of liquid smoke on the chemical and organoleptic properties of fish, and the resilience of fish after being given smoke liquid. The metode of experiments with skin biomass of durian, coconut shell, and palm shell. Biomass is dried, then is burned in rotary carbonisator pyrolysis. The results ofthe process are namely liquid, tar and charcoal smoke. Next, Liquid smoke is precipitated and then it is distilled twice, namely ordinary distillation and vacuum distillation. Results combustion produces liquid smoke with a yield of 19% on the skin of durian, 23.6% on coconut shell, and 20.8% on palm shells. Organoleptic test results on the fish with the addition of liquid smoke from the skin of durian with a concentration of 5 % is most preferred by the panellists in terms of color, aroma, flavor, and texture.

Uji Aktivitas Adsoben Karbon Aktif Tempurung Kelapa Termodifikasi dengan Active Site Fe2O3

The use of dyes in the textile industry has a negative impact, namely water pollution if the waste is discharged directly into the river or not treated properly. Liquid waste from the textile industry generally still contains dyes that are harmful to living things and the environment. In this study the dye adsorption method was used by using modified activated carbon from the coconut shell with the addition of the active site Fe 2 O 3 . Characterization and activity testing of iron / porous oxide activated carbon adsorbent will be carried out. The type of porous activated carbon used is coconut shell carbon with micropore characters. The stages of this study consisted of the impregnation process of iron oxide on porous carbon, the methylene blue adsorption process and the characterization of the resulting adsorbent. Based on the research that has been done, it can be concluded that the adsorption of Fe 2 O 3 / coconut shell activated carbon is very effectively applied for the absorption of dye wastewater. The adsorption capacity of methylene blue increased with increasing concentrations of loading of active sites of Fe and the percentage of adsorption capacity in the 180 minute reaction was 89.8% with the loading of iron oxide / coconut shell adsorbent 2%. In addition, from the results of the adsorbent activity test with variations in the mass addition of the adsorbent it can be concluded that the mass increase of the adsorbent significantly affected the yield of blue methylene adsorption.