Investigation the Adsorption of Heavy Oil from Solution by Low-Cost Material

2012 ◽  
Vol 463-464 ◽  
pp. 90-96
Author(s):  
Kadhim F. Al-Sultani
Keyword(s):  
Rice Husk ◽  
Heavy Oil ◽  
Langmuir Isotherm ◽  
Low Cost ◽  
Batch Adsorption ◽  
Aqueous Environment ◽  
Sorption Data ◽  
Initial Concentration ◽  
Agitation Time ◽  
Adsorbent Dose

Over the last decades, there has been increasing global concern over the public health impacts attributed to environmental pollution. Natural materials that are available in large quantities or certain waste from agricultural operations may have the potential to be used as low cost adsorbent ,widely available and are environmentally friendly after using them. Thus, rice husk RH, a commonly available waste in Iraq. RH and activated rice husk ARH (pretreated by 13M H2SO4 with 0.5 NaOH and thermally treated at573k) have been studied as sorbents for heavy oil cleanup operations in the aqueous environment (water pumped from brooks to sedimentation unit). Batch adsorption experiments were performed as a function of pH (2-10) , adsorbent dose(0.25-1g ), initial concentration (1-20g/100ml water) , agitation time (15-75min) and different temperature(298-338K),with100rpm.The maximum removal took place in the pH range of 8, adsorbent dose 1g ,initial concentration 20g/100ml water , agitation time 45 min and temperature 338k . The sorption data obtained from studies at optimized conditions have been subject to Freundlich and Langmuir isotherm studies .The data fits well to both the Freundlich and Langmuir isotherm models indicating favorable and monolayer adsorption .X-ray diffraction analysis ,which indicates that the RH and ARH mainly consist of amorphous materials .The adsorbents were characterized using FTIR . It was found that the pretreatment of rice husk increase the specific surface area and changed the functional groups , therefore leads to increase the capacity of adsorption.

Determination of Adsorption Capacity of Agricultural-Based Carbon for Ni (II) Adsorption from Aqueous Solution

2014 ◽  
Vol 567 ◽  
pp. 20-25 ◽  
Author(s):  
Taimur Khan ◽  
Mohamed Hasnain Isa ◽  
Malay Chaudhuri ◽  
Raza Ul Mustafa Muhammad ◽  
Mohamed Osman Saeed
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Contact Time ◽  
Low Cost ◽  
Equilibrium Adsorption ◽  
Batch Adsorption ◽  
Average Pore ◽  
Initial Concentration ◽  
Rice Husk Carbon

The aim of the study was to prepare potentially cheaper carbon for the adsorptive removal of Nickle [Ni (II)] from aqueous solution. The adsorption capacity of the prepared carbon to remove Ni (II) from aqueous solution was determined and adsorption mechanism was investigated. Rice husk carbon was prepared by incineration in a muffle furnace. The incinerated rice husk carbon (IRHC) was characterised in terms of surface area, micropore area, micropore volume, average pore diameter and surface morphology. Adsorption of Ni (II) by IRHC was examined. The influence of operating parameters, namely, pH, initial concentration and contact time on adsorption of Ni (II) by IRHC was evaluated. Batch adsorption tests showed that extent of Ni (II) adsorption depended on initial concentration, contact time and pH. Equilibrium adsorption was achieved in 120 min, while maximum Ni (II) adsorption occurred at pH 4. Langmuir and Freundlich isotherms were studied and the equilibrium adsorption data was found to fit well with the Langmuir isotherm model. Langmuir constants Q° and b were 14.45 and 0.10, and Freundlich constants Kf and 1/n were 4.0 and 0.26, respectively. Adsorption of Ni (II) by IRHC followed pseudo-second-order kinetics. Being a low-cost carbon, IRHC has potential to be used for the adsorption of Ni (II) from aqueous solution and wastewater in developing countries.

scholarly journals Application of treated eggplant peel as a low-cost adsorbent for water treatment toward elimination of Pb2+: Kinetic modeling and isotherm study

2018 ◽  
Vol 36 (3-4) ◽  
pp. 1112-1143 ◽  
Author(s):  
Mohammad Hossein Karimi Darvanjooghi ◽  
Seyyed Mohammadreza Davoodi ◽  
Arzu Y Dursun ◽  
Mohammad Reza Ehsani ◽  
Iman Karimpour ◽  
...  
Keyword(s):  
Contact Time ◽  
Low Cost ◽  
Standard Free Energy ◽  
Chemical Properties ◽  
Entropy Change ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Standard Entropy ◽  
Adsorption Parameters ◽  
Adsorbent Dose

In this study, treated eggplant peel was used as an adsorbent to remove Pb2+ from aqueous solution. For this purpose batch adsorption experiments were performed for investigating the effect of contact time, pH, adsorbent dose, solute concentrations, and temperature. In order to assess adsorbent’s physical and chemical properties, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy were used. The results showed that the adsorption parameters for reaching maximum removal were found to be contact time of 110 min, adsorbent dose of 0.01 g/ml, initial lead(II) concentration of 70 ppm, pH of 4, and temperature of 25°C. Moreover, for the experiments carried out at pH > 4 the removal occurred by means of significant precipitation as well as adsorption. Furthermore, these results indicated that the adsorption followed pseudo-second-order kinetics model implying that during the adsorption process strong bond between lead(II) and chemical functional groups of adsorbent surface took place. The process was described by Langmuir model (R2 = 0.99; maximum adsorption capacity 88.33 mg/g). Also thermodynamics of adsorption was studied at various temperatures and the thermodynamic parameters including equilibrium constant (K), standard enthalpy change, standard entropy change, and standard free energy changes were obtained from experimental data.

Optimization of Lead Adsorption on Rice-Husk Supported Zerovalent Iron Nanoparticles Using Response Surface Methodology

2019 ◽  
Vol 25 ◽  
pp. 1-11 ◽  
Author(s):  
Abiodun Paul Olalekan ◽  
Bamidele Sunday Fakinle ◽  
Adewunmi Oluwasogo Dada ◽  
Oghenerobo Benjamin Akpor ◽  
Oluwasola Oribayo
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Rice Husk ◽  
Contact Time ◽  
Low Cost ◽  
Zerovalent Iron ◽  
Hydroxyl Groups ◽  
Nanoscale Zerovalent Iron ◽  
Optimization Of Process Parameters ◽  
Adsorbent Dose

In this study, the Pb(II) ions adsorption unto nanoscale zerovalent iron particles (nZVI) supported on rice husk has been carried out. The challenge of nanoparticles agglomeration makes immobilising them on rice husk desirable. Optimization of process parameters, pH (4 – 10), adsorbent dose (0.5 – 2.0 g) and contact time (60 – 300 min), was carried out using response surface methodology (RSM) based on Box-Behnken design. Optimum condition for maximum Pb(II) ions of 98.74% was predicted at contact time of 60.12 min, pH of 4.01 and adsorbent dose of 0.5 g. At these optimized conditions, 97.23% removal was achieved experimentally. Analysis of variance carried out on the experimental data showed that the model was significant with a R2 of 0.9883. The synthesised adsorbent was characterized with Fourier transform-infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The SEM showed that RH-nZVI has a very porous surface structure. Amine, carboxyl and hydroxyl groups were some of the identified functional groups present in the adsorbent for adsorption. This study suggests that nZVI supported on rice husk is a viable low-cost adsorbent for removing Pb(II) ions from wastewater.

TREATMENT OF TEXTILE WASTE WATER AND SORPTION OF LEAD USING CHITOSAN FROM BIO-WASTE

2021 ◽  
Vol 6 (1) ◽  
pp. 50-62
Author(s):  
K.F.K. Oyedeko ◽  
A.S. Akinyanju ◽  
M.K. Lasisi ◽  
R.J. Patinvoh
Keyword(s):  
Waste Water ◽  
Correlation Coefficient ◽  
Langmuir Isotherm ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Textile Wastewater ◽  
Textile Effluent ◽  
Batch Adsorption ◽  
Textile Waste ◽  
Textile Waste Water

Textile effluent contains different organic and inorganic pollutants, among these are COD and heavy metals such as lead (Pb), chromium (Cr), cadium (Cd), and copper (Cu) used for the production of color pigments. In this study the adsorption capacity of chitosan produced from snail shells as an adsorbent for the treatment of textile effluent and for the removal of lead (Pb2+) from waste water carried out. Batch experiments were performed to study the treatment of textile waste water and the adsorption of lead Pb2+ion unto chitosan. The effect of various experimental parameters (adsorbent dose, contact time and temperature) was studied, and optimal conditions were determined. Batch adsorption study on textile waste water showed 96.9 % COD removal was achieved for carbon dosage of 15mg carbon/100ml of textile wastewater solution. The equilibrium data were analyzed with Langmuir, Freundlich, Temkin, Elovich, Florry Huggins, Jovanovic, Harkin Jura and Dubinin–Radushkevich (DRK) adsorption models. Freundlich isotherm yielded the best fit to the experimental equilibrium adsorption data with a correlation coefficient (R2 ) of 0.991. The adsorption intensity is 1.68. This was closely followed by Langmuir Isotherm with a correlation coefficient (R2 ) of is 0.943. The maximum monolayer coverage (Qo) from Langmuir isotherm model was determined to be 50.51mg/g, KL (Langmuir isotherm constant) is 0.00374L/mg, RL (the separation factor) is 0.217 indicating that the equilibrium sorption was favorable. Adsorption kinetics data for sorption of Pb2+ion unto chitosan were analyzed using the pseudo first order, pseudo second order and intra particle diffusion models. The results indicated that the adsorption kinetic data were best described by pseudo secondorder model. For the thermodynamic studies, the enthalpy change, ΔH°, and the entropy change, ΔS°, for the adsorption processes are -18.10 kJ/mol and -0.0652KJ/mol K respectively. The free energy, ΔG° for the process are 2186.39 J/mol, 3071.761 J/mol, 3689.615J/mol and 4153.032 J/mol at 303K, 313K, 323 K and 333K respectively. The results of thermodynamic parameters evaluated showed that the process was non spontaneous and exothermic in nature. The results show that chitosan can be used as an alternative low-cost adsorbent for treatment of textile effluent and the removal of COD and lead from wastewater.

Fixed Bed Column Filled with Rice Husk for the Removal of Cu (II) from Aqueous Solution

2010 ◽  
Vol 658 ◽  
pp. 53-56
Author(s):  
Zai Fang Deng ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Flow Rate ◽  
Low Cost ◽  
Fixed Bed ◽  
Design Parameters ◽  
Breakthrough Time ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Column Design

The performance of low-cost adsorbent such as rice husk fixed bed column in removing copper from aqueous solution were studied in this work. Different column design parameters like bed height, flow rate and initial concentration were calculated. It was found that at 10 mg/L concentration of Cu (Ⅱ) and at flow rate 5 mL/min with different bed depths such as 9, 12 and 15 cm, the breakthrough time increases from 150 to 260 min; the breakthrough time increases from 125 to 780 min with decreasing of flow rate from 15 to 5 mL/min and decreased from 260 to 50 min when initial concentration increased from 7 to 50 mg/L.

Adsorption of crude and engine oils from water using raw rice husk

2013 ◽  
Vol 69 (5) ◽  
pp. 947-952 ◽  
Author(s):  
Zahra Razavi ◽  
Nourollah Mirghaffari ◽  
Behzad Rezaei
Keyword(s):  
Rice Husk ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Langmuir Model ◽  
Engine Oil ◽  
Maximum Adsorption Capacity ◽  
Aqueous Environment ◽  
Engine Oils ◽  
Inductively Coupled

The raw rice husk (RRH) was used as a low cost adsorbent to remove three oil compounds with different viscosities (crude oil, engine oil and spent engine oil) from an aqueous environment. Some of the sorbent specifications were characterized using a CHNSO analyzer, Fourier transform infrared, scanning electron microscope and inductively coupled plasma spectroscopy. With decreasing RRH particles size, the oil adsorption percentage was reduced for crude, spent and engine oils from 50 to 30%, 65 to 20% and 70 to 0.01%, respectively. This was probably due to damage of the microcavities. The removal percentage by sorbent at optimized conditions was 88, 80 and 55% for engine, spent and crude oils, respectively, corresponding to their descending viscosity. The adsorption of crude and spent oils on rice husk followed the Freundlich isotherm model, while the adsorption of engine oil was fitted by the Langmuir model. The maximum adsorption capacity (qmax), calculated from the Langmuir model for the adsorption of engine oil on RRH, was 1,250 mg/g.

scholarly journals Kinetic and isotherm modeling of adsorption of dyes onto rice husk carbon

2013 ◽  
Vol 12 (2) ◽  
pp. 190-196 ◽  
Keyword(s):  
Rice Husk ◽  
Crystal Violet ◽  
Low Cost ◽  
First Order ◽  
Pseudo First Order ◽  
Rice Husk Carbon ◽  
Wastewater Samples ◽  
Modeling Of Adsorption ◽  
Kinetic And Isotherm Modeling ◽  
Agitation Time

Rice husk carbon (RHC) has the ability to adsorb the dyestuff from aqueous solution. It may be useful low cost adsorbent for the treatment of effluents, discharged from textile industries. The effectiveness of RHC have been tested for the removal of colour from the wastewater samples containing three dyes namely crystal violet, direct orange and magenta. Effect of various parameters such as agitation time, pH, temperature, adsorbent dose and concentration have been investigated in the present study. The adsorption of dyes have been best described by pseudo first order mechanism and Freundlich adsorption isotherms. The rate constant of adsorption (Kad) have been determined, which are found to be 6.8 x 10–3, 8 x 10–3 and 10 x 10–3 min–1 for crystal violet, direct orange and magenta respectively. Similarly the Freundlich constants related to the adsorption capacity (Kf) are found to be 0.74, 0.44 and 0.68 g l–1 and intensity of adsorption (n) are found to be 0.41, 0.73 and 0.33 mg g–1 for above dyes respectively.

scholarly journals Sorption of Pb2+ from Aqueous Solution unto Modified Rice Husk: Isotherms Studies

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
A. O. Dada ◽  
J. O. Ojediran ◽  
Abiodun Paul Olalekan
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Adsorption Isotherms ◽  
Langmuir Isotherm ◽  
Agricultural Waste ◽  
Sorption Process ◽  
Sorption Data ◽  
Freundlich Isotherms ◽  
Sorption Potential ◽  
Monolayer Coverage

Investigation of the sorption potential of rice husk, an agricultural waste, as an adsorbent was carried out. The rice husk was modified with orthophosphoric acid and was used for adsorption of lead (II) ions (Pb2+) from aqueous solution. Physicochemical properties of the modified rice husk were determined. Equilibrium sorption data were confirmed with Langmuir, Freundlich and Temkin adsorption isotherms. On the basis of adsorption isotherm graphs, R2 values were determined to be 0.995, 0.916, and 0.797 for Langmuir, Temkin, and Freundlich isotherms, respectively, indicating that the data fitted well into the adsorption isotherms, but Langmuir isotherm is a better model. The maximum monolayer coverage from Langmuir studies, Qmax=138.89 mg/g, Langmuir isotherm constant, KL=0.699 L/mg, and the separation factor, RL=1.41×10−2 at 100 mg/L of lead(II) ions indicating that the sorption process, was favourable. The suitability of modified rice husk as an adsorbent for the removal of lead ions from aqueous solution and its potential for pollution control is established.

scholarly journals Biosorption of Zinc from Aqueous Solution Using Chemically Treated Rice Husk

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ying Zhang ◽  
Ru Zheng ◽  
Jiaying Zhao ◽  
Yingchao Zhang ◽  
Po-keung Wong ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Rice Husk ◽  
Langmuir Isotherm ◽  
Metal Ion ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Effects Of Ph ◽  
Langmuir Isotherm Model ◽  
Ft Ir ◽  
Metal Ion Interactions

In this study, adsorption of zinc onto the adsorbent (untreated rice husk and NaOH-treated rice husk) was examined. During the removal process, batch technique was used, and the effects of pH and contact time were investigated. Langmuir isotherm was applied in order to determine the efficiency of NaOH-treated rice husk used as an adsorbent. The zinc adsorption was fast, and equilibrium was attained within 30 min. The maximum removal ratios of zinc for untreated rice husk and NaOH-treated rice husk after 1.5 h were 52.3% and 95.2%, respectively, with initial zinc concentration of 25 mg/L and optimum pH of 4.0. Data obtained from batch adsorption experiments fitted well with the Langmuir isotherm model. Maximum adsorption capacity of zinc onto untreated rice husk and NaOH-treated rice husk was 12.41 mg/g, and 20.08 mg/g respectively, at adsorbent dosage of 1 g/L at 25°C. The nature of functional groups (i.e., amino, carboxyl, and hydroxyl) and metal ion interactions was examined by the FT-IR technique. It was concluded that the NaOH-treated rice husk had stronger adsorption capacity for Zn2+compared with the untreated rice husk. The NaOH-treated rice husk is an inexpensive and environmentally friendly adsorbent for Zn2+removal from aqueous solutions.

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