Adsorption equilibria of basic dyestuff onto palm-fruit bunch particles

1995 ◽  
Vol 32 (11) ◽  
pp. 27-32 ◽  
Author(s):  
M. M. Nassar ◽  
M. F. Hamoda ◽  
G. H. Radwan
Keyword(s):  
Particle Size ◽  
Adsorption Isotherm ◽  
Low Cost ◽  
Palm Fruit ◽  
Basic Dye ◽  
Batch Tests ◽  
Adsorption Equilibria ◽  
Langmuir And Freundlich Models ◽  
Adsorbent Particle ◽  
Palm Bunch

Particles prepared from palm-fruit bunch have been used for the adsorption of a basic dye (BR 18) over range of initial dye concentrations and varying adsorbent particle size in the range of 106 to 300 m, using batch tests. The results revealed the potential for palm-bunch particles as low cost adsorbents. Uptake of the basic dye was higher at smaller adsorbent particle size. The adsorption isotherm follows both the Langmuir and Freundlich models. Values of the separation factor, R, indicate favourable for the basic dye - palm fruit bunch particles system, that is, 0< R <1 and Freundlich constant n >1.

scholarly journals Utilization of Palm-Fruit Bunch Particles for the Adsorption of Dyestuff Wastes

1996 ◽  
Vol 13 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Mamdouh M. Nassar ◽  
Mohamed F. Hamoda ◽  
Gamil H. Radwan
Keyword(s):  
Adsorption Isotherm ◽  
Particle System ◽  
Low Cost ◽  
Particle Sizes ◽  
Palm Fruit ◽  
Basic Dye ◽  
Batch Tests ◽  
Langmuir And Freundlich Models ◽  
Adsorbent Particle ◽  
Palm Bunch

Particles prepared from palm-fruit bunches have been used in batch tests for the adsorption of a basic dye (BR 18) over a range of initial dye concentrations with adsorbent particle sizes varying in the range 106–300 μm. The results revealed the potential of palm-bunch particles as low-cost adsorbents. The uptake of the basic dye was higher at smaller adsorbent particle sizes. The adsorption isotherm followed both the Langmuir and Freundlich models. Values of the separation factor, R, indicate favourable adsorption for the basic dye/palm-fruit bunch particle system, i.e., 0 < R < 1 and n > 1.

scholarly journals Desulphurization of Um Al Nar Refinery Straight-Run Kerosene and Gas Oil Using Palm Fruit Kernel Activated Charcoal: A Locally-Made Adsorbent

1997 ◽  
Vol 15 (4) ◽  
pp. 311-321 ◽  
Author(s):  
Gamil M.H. Radwan ◽  
Mamdouh M. Nassar
Keyword(s):  
Experimental Data ◽  
Activated Charcoal ◽  
Low Cost ◽  
Langmuir Model ◽  
Gas Oil ◽  
Sulphur Compounds ◽  
Palm Fruit ◽  
Freundlich Model ◽  
Batch Tests ◽  
Adsorbent Particle

Desulphurization of Um Al Nar Refinery straight-run kerosene and gas oil has been investigated using adsorption techniques. Palm fruit kernel activated charcoal (PFKAC), a locally-made adsorbent, has been used for the adsorption of sulphur compounds in batch tests over a range of initial sulphur concentrations at 25°C and adsorbent particle size ≤ 75 μm. The results revealed the potential of PFKAC as a low-cost adsorbent. PFKAC showed a higher capacity for sulphur at gas oil concentrations than in the case of kerosene. The experimental isothermal data were correlated to the Freundlich model. Values of the Freundlich exponent, n, were > 1 indicating that sulphur compounds are favourably adsorbed on PFKAC. The Langmuir model also fitted the experimental data. A correlation has been developed for fitting the experimental data and has been found to be reasonably good.

scholarly journals Studies on Removal of Cr (VI) from Aqueous Solutions Using Powder of Mosambi Fruit Peelings (PMFP) As a Low Cost Sorbent

2012 ◽  
Vol 9 (3) ◽  
pp. 1389-1399 ◽  
Author(s):  
R. Hema Krishna ◽  
A. V. V. S. Swamy
Keyword(s):  
Particle Size ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Low Cost ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Batch Tests ◽  
Freundlich Adsorption Isotherm ◽  
Equilibrium Data ◽  
Agitation Time

The powder of mosambi fruit peelings (PMFP) was used as an adsorbent for the removal of heavy metal like Cr (VI) from aqueous solutions was studied using batch tests. The influence of physico-chemical key parameters such as the initial metal ion concentration, pH, agitation time, adsorbent dosage, and the particle size of adsorbent has been considered in batch tests. Sorbent ability to adsorb Cr (VI) ions was examined and the mechanism involved in the process investigated. The optimum results were determined at an initial metal ion concentration was 10 mg/lit, pH=2, agitation time – 60 min, an adsorbent dose (150 mg/50 ml) and the particle size (0.6 mm). The % adsorption, Langmuir constants [Q0=7.51(mg/g) and b=1.69(mg/lit)] Freundlich constant(Kf=2.94), Lagergren rate constants (Kad(min-1)=5.75 x 10-2) for [Cr(VI)] 10 mg/lit were determined for the adsorption system as a function of sorbate concentration. The equilibrium data obtained were tested using Langmuir, Freundlich adsorption isotherm models, and the kinetic data obtained were fitted to pseudo first order model.

The Adsorption Isotherm Studies of Orange Peel on Pesticide Furadan

2013 ◽  
Vol 477-478 ◽  
pp. 1331-1335
Author(s):  
Guang Fu Xu ◽  
Hui Min Jing ◽  
Rui Xin Guo
Keyword(s):  
Aqueous Solution ◽  
Adsorption Isotherm ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Agricultural Waste ◽  
Orange Peel ◽  
Maximum Adsorption Capacity ◽  
Attractive Candidate ◽  
Adsorption Data ◽  
Langmuir And Freundlich Models

Orange peel, an agricultural waste available in large quantity in China, was utilized as low-cost adsorbent to remove furadan from aqueous solution by adsorption. Adsorption isotherms were calculated and discussed. Both Langmuir and Freundlich models fitted the adsorption data quite reasonably (R2> 0.98) and the maximum adsorption capacity was 161.29 mg.g-1. The results in this study indicated that orange peel was an attractive candidate for removing furadan from the aqueous solution.

scholarly journals Removal of Cadmium Ions from Aqueous Solutions Using Flax Seeds as an Adsorbent

2019 ◽  
Vol 12 (4) ◽  
pp. 1-8
Author(s):  
Nidaa Adil Jasim ◽  
Tamara Kawther Hussein
Keyword(s):  
Particle Size ◽  
Adsorption Isotherm ◽  
Low Cost ◽  
Operating Conditions ◽  
Optimum Operating ◽  
Isotherm Models ◽  
Adsorption Parameters ◽  
Adsorption Removal ◽  
Freundlich Adsorption Isotherm ◽  
Flax Seeds

Removal of Cd(II) from  aqueous solution through adsorption using flax seeds was studied. Adsorption parameters such as pH, adsorbent particle size, adsorbent dosages, and initial concentrations of metal ions were studied. All experiments were conducted at room temperature. Langmuir and Freundlich adsorption isotherm models were applied to describe the quantitative uptake of Cd(II) ions by adsorbent. The results show that the maximum adsorption removal reach to 77 %   for Cd (II) onto flax seeds, at optimum operating conditions: pH of 5, particle size of 75µm, adsorbent dosage of 2 g/100 ml and metal concentration of  5 mg/L . The equilibrium adsorption data for Cd(II) were better fitted to  Freundlich adsorption isotherm model than Langmuir. The study concludes that the use of flax seeds as an economic and locally adsorbent for removing Cd(II) from polluted solution is effective. Thus offering a low cost material show potential use it to remove heavy metals.

scholarly journals Thermogravimetric Analysis (TGA) of Graphene Materials: Effect of Particle Size of Graphene, Graphene Oxide and Graphite on Thermal Parameters

2021 ◽  
Vol 7 (2) ◽  
pp. 41
Author(s):  
Farzaneh Farivar ◽  
Pei Lay Yap ◽  
Ramesh Udayashankar Karunagaran ◽  
Dusan Losic
Keyword(s):  
Particle Size ◽  
Quality Control ◽  
Graphene Oxide ◽  
Thermogravimetric Analysis ◽  
Low Cost ◽  
Thermal Parameters ◽  
Carbon Decomposition ◽  
Size Number ◽  
Carbon Combustion ◽  
Oxygen Groups

Thermogravimetric analysis (TGA) has been recognized as a simple and reliable analytical tool for characterization of industrially manufactured graphene powders. Thermal properties of graphene are dependent on many parameters such as particle size, number of layers, defects and presence of oxygen groups to improve the reliability of this method for quality control of graphene materials, therefore it is important to explore the influence of these parameters. This paper presents a comprehensive TGA study to determine the influence of different particle size of the three key materials including graphene, graphene oxide and graphite on their thermal parameters such as carbon decomposition range and its temperature of maximum mass change rate (Tmax). Results showed that Tmax values derived from the TGA-DTG carbon combustion peaks of these materials increasing from GO (558–616 °C), to graphene (659–713 °C) and followed by graphite (841–949 °C) The Tmax values derived from their respective DTG carbon combustion peaks increased as their particle size increased (28.6–120.2 µm for GO, 7.6–73.4 for graphene and 24.2–148.8 µm for graphite). The linear relationship between the Tmax values and the particle size of graphene and their key impurities (graphite and GO) confirmed in this study endows the use of TGA technique with more confidence to evaluate bulk graphene-related materials (GRMs) at low-cost, rapid, reliable and simple diagnostic tool for improved quality control of industrially manufactured GRMs including detection of “fake” graphene.

Effect of Kaolin Particle Size Towards Preparation of Kaolin Ceramic Membrane

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
Siti Khadijah Hubadillah ◽  
◽  
Norsiah Hami ◽  
Nurul Azita Salleh ◽  
Mohd Riduan Jamalludin ◽  
...  
Keyword(s):  
Particle Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Field Emission ◽  
Preliminary Data ◽  
Membrane Structure ◽  
Ceramic Membrane ◽  
Low Cost ◽  
Dense Structure ◽  
Scanning Electron

The purpose of this work is to study the effect of kaolin particle size for the preparation of low cost ceramic membrane suspension and ceramic membrane structure. Kaolin particle size is categorized into two categories; i) ≤ 1µm and ii) ≥ 1 µm. The suspension is prepared via stirring technique under 1000 rpm at 60°C. The particle size of kaolin is characterized using field emission scanning electron microscope (FESEM) and the prepared suspension is characterized in term of its viscosity. Results indicate that the particle size gave significant effect to the viscosity of ceramic membrane suspension. Preliminary data showed that kaolin with particle size ≤ 1µm resulted ceramic membrane with dense structure.

Characterization of the emission behavior of pulse-jet cleaned filters using a low-cost particulate matter sensor/Charakterisierung der Emission von druckstoßgereinigten Oberflächenfiltern mit einem Low-Cost-Feinstaubsensor

Gefahrstoffe ◽  
2019 ◽  
Vol 79 (11-12) ◽  
pp. 443-450
Author(s):  
P. Bächler ◽  
J. Meyer ◽  
A. Dittler
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Low Cost ◽  
Particle Emission ◽  
Filter Medium ◽  
Emission Measurement ◽  
Pm2.5 Concentration ◽  
Pulse Jet

The reduction of fine dust emissions with pulse-jet cleaned filters plays an important role in industrial gas cleaning to meet emission standards and protect the environment. The dust emission of technical facilities is typically measured “end of pipe”, so that no information about the local emission contribution of individual filter elements exists. Cheap and compact low-cost sensors for the detection of particulate matter (PM) concentrations, which have been prominently applied for immission monitoring in recent years have the potential for emission measurement of filters to improve process monitoring. This publication discusses the suitability of a low-cost PM-sensor, the model SPS30 from the manufacturer Sensirion, in terms of the potential for particle emission measurement of surface filters in a filter test rig based on DIN ISO 11057. A Promo® 2000 in combination with a Welas® 2100 sensor serves as the optical reference device for the evaluation of the detected PM2.5 concentration and particle size distribution of the emission measured by the low-cost sensor. The Sensirion sensor shows qualitatively similar results of the detected PM2.5 emission as the low-cost sensor SDS011 from the manufacturer Nova Fitness, which was investigated by Schwarz et al. in a former study. The typical emission peak after jet-pulse cleaning of the filter, due to the penetration of particles through the filter medium, is detected during Δp-controlled operation. The particle size distribution calculated from the size resolved number concentrations of the low-cost sensor yields a distinct distribution for three different employed filter media and qualitatively fits the size distribution detected by the Palas® reference. The emission of these three different types of filter media can be distinguished clearly by the measured PM2.5 concentration and the emitted mass per cycle and filter area, demonstrating the potential for PM emission monitoring by the low-cost PM-sensor. During the period of Δt-controlled filter aging, a decreasing emission, caused by an increasing amount of stored particles in the filter medium, is detected. Due to the reduced particle emission after filter aging, the specified maximum concentration of the low-cost sensor is not exceeded so that coincidence is unlikely to affect the measurement results of the sensor for all but the very first stage of filter life.

Microbial-Induced Mineralization of Zinc Ions Based on the Degradation of Toluene and Its Characterization

2021 ◽  
Vol 13 (4) ◽  
pp. 656-661
Author(s):  
Yiyan Lv ◽  
Qiwei Zhan ◽  
Xiaoniu Yu
Keyword(s):  
Particle Size ◽  
Phase Composition ◽  
Surface Morphology ◽  
Organic Compounds ◽  
Low Cost ◽  
Zinc Ion ◽  
Zinc Ions ◽  
Quick Response ◽  
Zinc Carbonate ◽  
Carbonate Ions

Microbial-induced degradation of aromatic organic compounds and mineralization of zinc ions have attracted much attention because of its low cost, simple operation and quick response. This research, toluene was decomposed and made the concentration of carbonate ions increased accordingly by the enzymatic pressing of microorganisms, meanwhile carbonate ions mineralized zinc ions into carbonate precipitations. The composition and microstructure were analyzed systematically. The analysis results indicated that carbonate precipitations, basic zinc carbonate, could be successfully prepared by microbial method. The particle size of basic zinc carbonate was nanometer, and its shape was near-spherical. Furthermore, the phase composition, functional groups and surface morphology of the precipitations prepared by different methods were basically the same. This work provided a new method for remediation of zinc ion pollution based on the degradation of toluene.

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