scholarly journals Comparative analysis of Activated Corn Cob and Bentonite Clay for the Removal of Lead and Nickel from Raw Water

2021 ◽  
Vol 29 (2) ◽  
pp. 30-38
Author(s):  
Uchechi Akomah ◽  
Ify Lawrence Nwaogazie ◽  
Onyewuchi Akaranta ◽  
Adekunle Olorunlowo David
Keyword(s):  
Aqueous Solution ◽  
Adsorption Isotherm ◽  
Low Cost ◽  
Industrial Effluent ◽  
Bentonite Clay ◽  
Adsorptive Capacity ◽  
Corn Cob ◽  
Anova Test ◽  
Freundlich Adsorption Isotherm ◽  
Coefficient Of Skewness

Abstract The extensive use of commercial activated carbon as an adsorbent for the purification of industrial effluent is not economical for small and medium-sized enterprises due to its high operational cost. This study was carried out to compare the adsorptive capacity of bentonite clay and activated corn cob (“BC” and “ACC”) for the removal of lead (II) and nickel (II) ions from an aqueous solution. The results obtained from the characterization of the BC and ACC are pH: 7.43 and 6.74; moisture content: 36.45kg/kg and 12.10kg/kg, and bulk density: 1.243g/ml and 1.162g/ml, respectively. Normality tests using the coefficient of skewness indicated that the set of data was not normally distributed. An analysis of variance (ANOVA) test conducted using Friedman’s 2-way ANOVA test indicated p values of 0.0253 against an alpha value of 0.05, which indicates significance. The Friedman results indicated significance with respect to the varied dosages, initial concentrations, and contact time. The effect of the adsorbent was not significant. The adsorption isotherms were analysed using the Langmuir, Freundlich, and Temkin isotherms. Most research studies have shown that adsorption experiments performed using most low-cost materials tend to follow the Freundlich adsorption isotherm, but the results of this experimental study proved that activated corn cob and bentonite clay performed better with the Temkin adsorption isotherm with 0.879 ≤ R2 ≤ 0.917 for the bentonite clay and 0.9572 ≤ R2 ≤ 0.99 for the activated corn cob respectively. The study revealed that these materials are good adsorbents that can be used for the removal of lead (II) and nickel (II) ions from an aqueous solution.

scholarly journals Adsorption Study for Chromium (VI) on Iraqi Bentonite

2010 ◽  
Vol 7 (1) ◽  
pp. 745-756
Author(s):  
Baghdad Science Journal
Keyword(s):  
Adsorption Isotherm ◽  
Adsorption Process ◽  
Kinetic Equations ◽  
Bentonite Clay ◽  
Sorption Process ◽  
Adsorption Study ◽  
Chromium Vi ◽  
Freundlich Adsorption Isotherm ◽  
Different Temperatures ◽  
The Subject

The subject of this research involves studying adsorption to remove hexavalent chromium Cr(VI) from aqueous solutions. Adsorption process on bentonite clay as adsorbent was used in the Cr(VI) concentration range (10-100) ppm at different temperatures (298, 303, 308 and 313)K, for different periods of time. The adsorption isotherms were obtained by obeying Langmuir and Freundlich adsorption isotherm with R2 (0.9921-0.9060) and (0.994-0.9998), respectively. The thermodynamic parameters were calculated by using the adsorption process at four different temperatures the values of ?H, ?G and ?S was [(+6.582 ? +6.547) kJ.mol-1, (-284.560 ? -343.070) kJ.mol-1 and (+0.977 ? +1.117) kJ.K-1.mol-1] respectively. This data indicates the spontaneous sorption process. The kinetic study of adsorption process was studied depending on three kinetic equations: 1- Lagergren equation 2- Morris-Weber equation 3- Reichenberg equation

scholarly journals The Removal of Dye from Aqueous Solution by Adsorption on Low Cost Adsorbents

2010 ◽  
Vol 7 (3) ◽  
pp. 1003-1007 ◽  
Author(s):  
J. J. Chamargore ◽  
J. V. Bharad ◽  
B. R. Madje ◽  
M. B. Ubale
Keyword(s):  
Aqueous Solution ◽  
Sulphuric Acid ◽  
Room Temperature ◽  
Dye Removal ◽  
Low Cost ◽  
Industrial Effluents ◽  
Adsorptive Capacity ◽  
Dye Uptake ◽  
Marble Powder ◽  
System Variables

Removal of color from aqueous solution by using low cost easily available adsorbent was conducted by batch experiment. The potential of the low cost adsorbent (Marble powder-treated and untreated) to remove methylene red from aqueous solution were assessed at room temperature. Laboratory investigation of the potential of marble powder and sulphuric acid treated marble powder to remove dye color from aqueous solution has been studied. Parameters studied included pH, adsorbent dose, initial dye concentration and contact time. The influence of these system variables were investigated to observe the effect on the rate of dye uptake. Sulphuric acid treated marble powder has shown better adsorptive capacity than untreated marble powder and thus it has become an interesting option for dye removal from industrial effluents.

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 Sorption Capacity of Toxic Heavy Metal Cr (VI) Ion on bentonite clay from Aqueous Solution by Kinetic and Thermodynamic Studies

2021 ◽  
Vol 37 (5) ◽  
pp. 1096-1101
Author(s):  
Priyanka Rathore ◽  
Rashmi Verma
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Sorption Capacity ◽  
Bentonite Clay ◽  
Temperature Dependent ◽  
Experimental Conditions ◽  
Toxic Heavy Metal ◽  
Freundlich Adsorption Isotherm ◽  
Kinetic And Thermodynamic Studies ◽  
Kinetic Equilibrium

The present study removal of toxic heavy metal Cr (VI) ion on bentonite clay from aqueous solution under different experimental conditions and also study sorption capacity are effect different pH, concentration, temperature and contact time of shaking.My study focused on use of bentonite clay as a best adsorbent for the removal of toxic heavy metal Cr (VI) ions from aqueous solution. Initial metal ions concentration increases 50 to 250mgL-1 the % removal Cr (VI) ion decreases from 66.64 % to 53.94 % but amount of sorption increases from 0.833 to 3.371mgg-1, The particle size of bentonite clay increase from 45 to 150μ by amount of adsorption of Cr (VI) decreasing from1.589 mgg-1 to 1.153mgg-1 , pH increasing from 2.0 to 10.0 the amount of sorption decrease from 2.018 to 1.161 mgg-1, temperature increasing from 303K to 313K adsorption is also increases from 1.589 to 1.822mgg-1. Kinetic study for value of rate constant k1 and k2 is favour concentration increases the amounts of the metals sorbent qcal also increases. Q and kf sorption capacity related to Langmuir and Freundlich adsorption isotherm constant. Value of both is favour sorption is temperature dependent. Thermodynamic study the value of ΔG0 increase -1.402 to -2.655it is best evidence temperature increases from 303K to 323K the adsorption of Cr (VI) ion increases because value of ΔG0 is negative favour the adsorption. My investigation best evidence the value of kinetic, equilibrium and thermodynamic parameter also favours the Sorption of Cr (VI) ion on bentonite clay from aqueous solution.

scholarly journals Utilization of Banana (Musa sapientum) Peel for Removal of Pb2+ from Aqueous Solution

2021 ◽  
Vol 1 (2) ◽  
pp. 117-128
Author(s):  
Afrida Nurain ◽  
Protima Sarker ◽  
Md. Shiblur Rahaman ◽  
Md. Mostafizur Rahman ◽  
Md. Khabir Uddin
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Adsorption Isotherm ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Agitation Speed ◽  
Banana Peel ◽  
Management Problem ◽  
Freundlich Adsorption Isotherm

Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best fitting (r2 = 0.9978 and 0.9595) for Pb2+ adsorption. The maximum Pb2+ adsorption capacity was 2.1 mg g-1. The findings indicate that the banana peel waste could be a potential adsorbent for heavy metal removal. Moreover, the waste management problem could be solved in an eco-friendly manner by utilizing it for the eradication of Pb2+ from wastewater.

Adsorption of Cationic Dyes from Aqueous Solution onto Rapeseed Meal

2012 ◽  
Vol 550-553 ◽  
pp. 1550-1555
Author(s):  
Guo Lan Li ◽  
Song Li ◽  
Deng Liang He ◽  
Jun Liang Du
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Low Cost ◽  
Agricultural Waste ◽  
Industrial Effluent ◽  
Rapeseed Meal ◽  
Adsorption Rate ◽  
Cationic Dyes ◽  
Pseudo Second Order ◽  
Isotherm Equations

Using an agricultural waste rapeseed meal (RM) as adsorbent, the adsorption of methylene blue (MB) and malachite green (MG) from aqueous solution has been studied. For this purpose, the adsorption of MB and MG onto the RM with aspects of kinetics, equilibrium and the effect of pH were investigated. The equilibrium experimental data of MB and MG is in well accordance with isotherm equations of Langmuir and Freundlich. And the maximum uptake capacities (qm) of MB and MG were 122 and 78 mg.g-1respectively. It was observed that the adsorption rate of MB and MG onto the RM were very rapid and the adsorption process followed the pseudo-second-order equation. The RM appears as a very prospective adsorbent for the removal of cationic dyes from industrial effluent due to its high uptake, rapid adsorption rate and low cost.

Study on Arsenic Removal Efficiency and Mechanism of Titanium Modified Manganese Ore

2011 ◽  
Vol 356-360 ◽  
pp. 1061-1065
Author(s):  
Yong Bing Huang ◽  
Xiu Ying Liu ◽  
Li Li Wang ◽  
Xiao Juan Li ◽  
Shu Xin Tu
Keyword(s):  
Adsorption Isotherm ◽  
Removal Efficiency ◽  
Arsenic Removal ◽  
Low Cost ◽  
Manganese Ore ◽  
Langmuir Adsorption ◽  
Freundlich Adsorption Isotherm ◽  
Adsorption Quantity ◽  
Modification Condition ◽  
Dipping Time

Natural manganese ore is a kind of arsenic removal mineral. It is low-cost and widely available. In order to enhance its removal efficiency and adsorption quantity of arsenic, this paper adopted TiCl4 to modify natural manganese ore and optimized the conditions of modification. The results showed that the best modification condition was: TiCl4 at a concentration of 10 mg•L-1, dipping time of 18h, pH 3.05, reaction time of 60 min; under these conditions, the removal rates of As (Ⅲ) and As (Ⅴ) respectively reached 94.87% and 99.31%, much higher compared with natural manganese ore (82.95% and 77.93%). The saturated adsorption quantity of As (Ⅲ) and As (Ⅴ) reached 3.48 mg•g-1 and 3.27 mg•g-1, each increasing 1.25 mg•g-1 and 1.21 mg•g-1. The adsorption of As (Ⅲ) by modified manganese ore fits the Freundlich adsorption isotherm, while As (Ⅴ) fits the Langmuir adsorption isotherm best.

Simultaneous sorption of As, B, Cr, Mo and Se from coal fly ash leachates by Al3+-pillared bentonite clay: implication for the construction of activated geo-synthetic clay liner

2017 ◽  
Vol 12 (1) ◽  
pp. 186-201 ◽  
Author(s):  
Vhahangwele Masindi ◽  
W. Mugera Gitari ◽  
Hlanganani Tutu
Keyword(s):  
Fly Ash ◽  
Adsorption Isotherm ◽  
Coal Fly Ash ◽  
Bentonite Clay ◽  
Order Kinetic ◽  
Modified Bentonite ◽  
Adsorption Affinity ◽  
Freundlich Adsorption Isotherm ◽  
Order Kinetic Model ◽  
Pseudo Second Order

The present study reports the optimum conditions for intercalating the Al3+ species to bentonite clay matrices and evaluate the potential of using Al3+-modified bentonite clay (Alum-Bent) for removal of oxyanionic species of As, B, Cr, Mo and Se from coal fly ash (FA) leachates. Removal of oxyanionic species was done in batch experimental procedures. Parameters optimized were: contact time, adsorbent dosage, concentration and pH. The adsorption affinity of Al3+-bentonite clay for oxyanionic species varied as follows: B ≈ Se > Mo > Cr ≈ As respectively. The adsorption data fitted better to Langmuir adsorption isotherm than Freundlich adsorption isotherm hence confirming mono-site adsorption. The adsorption kinetics fitted well pseudo-second-order kinetic model hence confirming chemisorption. The fact that most of the oxyanion were adsorbed at pH ≥ pHpzc indicated that both electrostatic and chemical interactions occurred with the clay surface and interlayers. The Al3+-modified bentonite clay successfully removed oxyanion species from generated coal FA leachates. This study shows that Al3+-modified bentonite clay is an effective adsorbent for oxyanion species in coal FA leachates and could be applied as a reactive barrier in coal FA retention ponds.

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 Removal of Chromium (VI) from Aqueous Solution using Charred Pomegranate Waste

2013 ◽  
Vol 29 ◽  
pp. 81-88
Author(s):  
Rajendra Prasad Gautam ◽  
Megh Raj Pokhrel
Keyword(s):  
Aqueous Solution ◽  
Adsorption Isotherm ◽  
Low Cost ◽  
Chemical Society ◽  
Isotherm Models ◽  
Model Parameters ◽  
Chromium Vi ◽  
Fruit Waste ◽  
Sorption Parameters ◽  
Pomegranate Fruit

Removal of Cr(VI) from aqueous solution was studied using charred pomegranate fruit waste [CPW] as a new low cost biosorbent under batch method at room temperature. Its efficiency for removal of Cr(VI) was compared with raw pomegranate fruit waste[RPW]. Various sorption parameters such as contact time, initial concentration of Cr(VI) ion and effect of pH on the adsorption capacity of the biosorbent were studied. The adsorbent was effective for quantitative removal of Cr(VI) ions in highly acidic condition (pH=1) and equilibrium has been achieved in 2 hours. The adsorption isotherm data were fitted to Langmuir and Freundlich adsorption isotherm models and the model parameters were evaluated. Spectrophotometric method using diphenylcarbazide as a complexing reagent was used to analyze the chromium content in synthetic samples and the landfill site effluent collected from Kuleshwor, Kathmandu, Nepal.DOI: http://dx.doi.org/10.3126/jncs.v29i0.9256Journal of Nepal Chemical Society Vol. 29, 2012 Page:  81-88 Uploaded date: 12/5/2013 

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