A Study on Lead Adsorption by the Hen Egg Shells from Enshi, Hubei Province, China

2019 ◽  
Vol 294 ◽  
pp. 11-16
Author(s):  
Heng Heng Gong ◽  
Tao Li ◽  
Wen Ya Zhang ◽  
Zhao Jiang Liao
Keyword(s):  
Aqueous Solution ◽  
Hubei Province ◽  
Lead Ions ◽  
Lead Ion ◽  
Water Quality Standards ◽  
Order Model ◽  
Lead Adsorption ◽  
First Order ◽  
Egg Shells ◽  
Hen Egg

The hen egg shells (HES) from EnShi, HuBei Province, China, which contain selenium, are used as adsorbent for the adsorption of lead ion from its aqueous solutions. The selenium in the HES could help to remove lead from its aqueous solution. The HES had been found to be the more efficient in the experiment and removed about 95% of lead from its aqueous solution. The final concentration of lead ion was found lower than the waste water quality standards from the initial concentration of lead ion 100.0 mg/L through these two steps of adsorptions. One gram of the HES can adsorb nearly 31.71±0.040 mg of lead ions. The adsorption kinetics was fitted by first-order model throughout the period. The present adsorption process is spontaneous, indicating HES can be availably used for the removal of lead ions from its aqueous solution.

scholarly journals Biosorption of Lead Ions from Aqueous Solution UsingFicus benghalensisL.

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Venkateswara Rao Surisetty ◽  
Janusz Kozinski ◽  
L. Rao Nageswara
Keyword(s):  
Aqueous Solution ◽  
Process Parameters ◽  
Contact Time ◽  
Batch Process ◽  
Ion Concentration ◽  
Lead Ions ◽  
Lead Ion ◽  
Maximum Adsorption Capacity ◽  
Ficus Benghalensis ◽  
Leaf Powder

Ficus benghalensisL., a plant-based material leaf powder, is used as an adsorbent for the removal of lead ions from aqueous solution using the biosorption technique. The effects of process parameters such as contact time, adsorbent size and dosage, initial lead ion concentration, and pH of the aqueous solution on bio-sorption of lead byFicus benghalensisL. were studied using batch process. The Langmuir isotherm was more suitable for biosorption followed by Freundlich and Temkin isotherms with a maximum adsorption capacity of 28.63 mg/g of lead ion on the biomass ofFicus benghalensisL. leaves.

scholarly journals Removal Of Lead (Pb2+) From Aqueous Solutions By Natural Bentonite

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Wahyu Wilopo ◽  
Doni Prakasa Eka Putra ◽  
I Wayan Warmada ◽  
Tsuyoshi Hirajima
Keyword(s):  
Aqueous Solution ◽  
Grain Size ◽  
Adsorption Process ◽  
Exchange Process ◽  
Freundlich Isotherm ◽  
Exchange Capacity ◽  
Ion Concentration ◽  
Lead Ions ◽  
Lead Ion ◽  
Batch Adsorption

The aim of the present work is to investigate the ability of natural bentonite (untreated) from Pacitan, East Java to remove lead ions from aqueous solution. The bentonite has specific surface area and cation exchange capacity of 27.52 m2 g−1 and 65.20 meq/100 gr of bentonite, respectively. Towards this aim, batch adsorption experiments were carried out and the effect of various parameters on this removal process has been investigated. The effects of pH, grain size of bentonite, adsorption time and lead ion concentration on the adsorption process were examined. The optimum pH for adsorption was found to be 9, with the finer grain size of bentonite is more effective. In adsorption studies, residual lead ions concentration reached equilibrium in a duration of 24 hours. Adsorption of lead on bentonite appeared to follow Freundlich isotherm. Our results demonstrate that the adsorption process was mostly dominated by ion exchange process. Keywords: Removal, lead, aqueous solution, natural bentonite, adsorption.

scholarly journals Active Carbon as an Adsorbent for Lead Ions

1997 ◽  
Vol 15 (10) ◽  
pp. 815-824 ◽  
Author(s):  
Sohail Akhtar ◽  
Riaz Qadeer
Keyword(s):  
Active Carbon ◽  
Physical Adsorption ◽  
Order Rate Constant ◽  
Ion Concentration ◽  
Lead Ions ◽  
Lead Ion ◽  
First Order ◽  
First Order Kinetics ◽  
Isotherm Equations ◽  
Time Lead

A commercial active carbon has been tested as an adsorbent for the removal of lead ions from aqueous solutions. Optimum conditions for maximum adsorption in terms of shaking time, lead ion concentration, temperature and concentration of different acids were established. The results obtained reveal that the adsorption of lead ions on active carbon is athermic (ΔH = 0) in nature and follows first-order kinetics. The first-order rate constant was evaluated as 0.049 min−1 and the intraparticle diffusion rate as 3.07 × 10−4 (g/g min1/2). The data also obey the Freundlich, Langmuir and Dubinin-Radushkevich (D-R) isotherm equations over the concentration range studied. The magnitude of the adsorption energy, 7.61 kJ/mol, calculated from the β-constant of the D-R equation lies in the energy range for physical adsorption which is attributed to weak bonding between the lead ions and the active carbon.

Removal of Benzene from Aqueous Solution Using Carbon Nanotube Synthesized from Fuel Oil Waste

2014 ◽  
Vol 925 ◽  
pp. 105-109
Author(s):  
Ismail Al-Khateeb ◽  
Ahmed M. Mohammed ◽  
Adawiya J. Haider ◽  
Y. Al-Douri
Keyword(s):  
Aqueous Solution ◽  
Carbon Nanotube ◽  
Power Plants ◽  
Equilibrium Constants ◽  
Fuel Oil ◽  
Order Model ◽  
Adsorption Models ◽  
First Order ◽  
Adsorption Data ◽  
Enthalpy And Entropy

This investigation is dealing with adsorption of benzene compound from aqueous solution using a new carbon nanotube (CNT) synthesized from a fuel oil waste of power plants which identify by FE-SEM and TEM. It was found that a CNT has a very significant adsorption for benzene compared to that of non-activated carbon. The equilibrium adsorption data were analyzed using adsorption models of Langmuir, Freundlich and Temkin. The results showed that the model isotherms are fitting very well with the experimental data. Kinetic study was conducted and the results pointed out that a pseudo-first order model was represented the data. Values of the activation thermodynamic functions were calculated through equilibrium constants at different temperature. All values of Gibbs functions were negative with values of-1.6 and-13.0 kJmol-1 for non-active and CNT respectively, while values of enthalpy and entropy were about-33kJmol-1 and-65JK-1 mol-1 for CNT respectively. These results indicated that the adsorption process was feasible, spontaneous and exothermic.

scholarly journals Surface Modification of Powdered Maize Husk with Sodium Hydroxide for Enhanced Adsorption of Pb(II) Ions from Aqueous Solution

2020 ◽  
Vol 9 (1) ◽  
pp. 95-104
Keyword(s):  
Aqueous Solution ◽  
Sodium Hydroxide ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Lead Ions ◽  
Solution Temperature ◽  
Lead Ion ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorbent Dose

The impact of sodium hydroxide pretreatment of maize husk on its lead ion removal efficiency was investigated. Pretreatment of maize husk with this alkali increased its surface area and porosity from 528.74 m2/g and 0.477 cm3/g to 721.54 m2/g and 0.642 cm3/g, respectively. Batch adsorption studies were carried out to evaluate the effects of initial pH, adsorbent dose, initial lead ion concentration, initial solution temperature, and contact time on the adsorption process. The maximum removal efficiency of maize husk at pH 5 and adsorbent dose 2 g/L was 62.85 %, which increased to 82.84 % after pretreatment and was attained in 15 min. The adsorption data for the natural and pretreated maize husk were best fitted in the Freundlich isotherm model, with their adsorption intensity (n) having values >1, which indicated that lead ion adsorption onto the adsorbent types was a favorable physical process. The adsorption of lead ions onto the adsorbents followed the pseudo-first-order kinetic model. The experimental adsorption capacities of maize husk (31.43 mg/g) and its modified form (41.22 mg/g) were very close to those obtained from this model (31.03 mg/g and 40.65 mg/g respectively). The ΔH and ΔG values of the adsorption process showed that the adsorption of lead ions by both adsorbents was an endothermic process and occurred spontaneously. Alkali pretreated maize husk can therefore be used as a cheap adsorbent to remove lead ions from aqueous solution.

scholarly journals Adsorption of Crude Oil Spill from Aqueous Solution using Agro-Wastes as Adsorbents

2021 ◽  
pp. 27-52
Author(s):  
Akinsete O. Oluwatoyin ◽  
Araoye A. Olalekan
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Carbon Adsorbents ◽  
Banana Peel ◽  
Rice Husks ◽  
Order Model ◽  
First Order ◽  
Pseudo Second Order ◽  
Crude Oil Spill

Ever increasing and growing awareness of oil-spillage to water environment has led to the search for cost-effective unconventional remediating techniques. This study was carried out using agro-wastes (Rice Husks, Banana Peels and Groundnut Husks) adsorbents. They were activated with H3PO4 for crude oil spill removal from aqueous solution; results were analysed using atomic absorption spectroscopy. The raw agro-wastes and their activated forms were characterized by SEM. The sorption study for maximum adsorption capacity were carried out at different adsorbent concentrations, adsorbent dosage, contact time, pH and rotational speed. The experimental results were analysed using Langmuir, Freundlich, Temkin, Dubinin-Radushkevich isotherm models. The maximum average adsorption capacity (qe) for raw and activated carbon adsorbents were observed in rice husks with 0.2750 and 0.3698 mg/g respectively. The Langmuir isotherm was found to well represent the measured sorption data for the raw and activated banana peel while the remaining raw and activated adsorbents followed the Temkin isotherm. The batch adsorption data on the effect of contact time were fitted into the pseudo-first-order and pseudo-second order models. The banana peel data and its activated form were best described by the pseudo-second-order model indicating chemisorption process while the remaining adsorbents followed the pseudo-first-order model indicating physisorption process. The average removal efficiency of oil by the various adsorbents used increase in the order: (Raw: Banana Peels (50.4 %) < Groundnut Husks (56.8 %) < Rice Husks (74.4 %); Activated Carbon: Banana Peels (61.4 %) < Groundnut Husks (65.6 %) < Rice Husks (82.8 %)). Results of this study (high values of R2 and least values AARE and RMSE) revealed and confirmed that activated carbon adsorbents have better adsorption capacity than the raw forms to clean-up oil spills in aqueous solution.

scholarly journals Biosorption of Pb(II) and Zn(II) by Extracellular Polymeric Substance (Eps) of Rhizobium Radiobacter: Equilibrium, Kinetics and Reuse Studies

2013 ◽  
Vol 39 (2) ◽  
pp. 129-140 ◽  
Author(s):  
Lili Wang ◽  
Jixian Yang ◽  
Zhonglin Chen ◽  
Xiaowei Liu ◽  
Fang Ma
Keyword(s):  
Aqueous Solution ◽  
Extracellular Polymeric Substance ◽  
Kinetics Study ◽  
Order Model ◽  
Rhizobium Radiobacter ◽  
Promising Alternative ◽  
First Order ◽  
Ph Values ◽  
Polymeric Substance ◽  
Equilibrium Data

Abstract The extracellular polymeric substance (EPS) produced from Rhizobium radiobacter F2, designated as EPSF2, was investigated as a biosorbent for the removal of Pb(II) and Zn(II) from aqueous solution. The optimum biosorption pH values were 5.0 for Pb(II) and 6.0 for Zn(II). Kinetics study revealed that the biosorption followed pseudo-first-order model well, and the equilibrium data fit the Langmuir model better. The adsorbed metal ions could be effectively desorbed by HCl. Desrobed EPSF2 regained 80% of the initial biosorption capacity after five cycles of biosorption-desorption-elution. These results demonstrated that EPSF2 could be a promising alternative for Pb(II) and Zn(II) removal from aqueous solution.

Unique lead adsorption behavior of ions sieves in pellet-like reduced graphene oxide

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 73333-73339 ◽  
Author(s):  
Dejian Chen ◽  
Shunxing Li ◽  
Liling Zou ◽  
Fengying Zheng
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Adsorption Behavior ◽  
Lead Ions ◽  
Lead Adsorption ◽  
Reduced Graphene

A pellet-like reduced graphene oxide has been presented for lead ions removal like behavior of ions sieves in aqueous solution.

Effects of egg shells for lead ions removal from aqueous solution

2018 ◽  
Vol 127 ◽  
pp. 97-103
Author(s):  
Hasan Koçyigit ◽  
Büsra Sahin
Keyword(s):  
Aqueous Solution ◽  
Lead Ions ◽  
Egg Shells

scholarly journals The Application of Response Surface Methodology for Lead Ion Removal from Aqueous Solution Using Intercalated Tartrate-Mg-Al Layered Double Hydroxides

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yamin Yasin ◽  
Maszlin Mohamad ◽  
Faujan B. H. Ahmad
Keyword(s):  
Aqueous Solution ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Contact Time ◽  
Lead Ions ◽  
Lead Ion ◽  
Central Composite Rotatable Design ◽  
Solution Ph ◽  
Optimization Parameters ◽  
Central Composite

Layered double hydroxide intercalated with tartrate (tartrate-Mg-Al) was used as an adsorbent to remove lead ions from aqueous solutions. The effects of various optimization parameters such as contact time, solution pH, lead ion concentrations, and adsorbent dosage were investigated by the use of Response Surface Methodology (RSM). The Response Surface Methodology (RSM) based on a four-level four-variable Central Composite Rotatable Design (CCRD) was employed to evaluate the interactive effects of the various optimization parameters. The parameters were contact time (6–10 h), solution pH (1–3), adsorbent dosage (0.06–0.1 g), and lead ion concentrations (10–30 mg/L). The percentage of lead ions removal for each of the parameters studied was determined by Inductively Coupled Plasma-Optical Emission Spectrophotometer. Simultaneously by increasing contact time and amount of dosage of tartrate-Mg-Al used the percentage of lead ions removal from aqueous solution will increase; however, the percentage removal decreases with an increase in pH and concentrations of lead ions. The experimental percentage removal recorded under optimum conditions was compared well with the maximum predicted value from the RSM, which suggest that Central Composite Rotatable Design of RSM can be used to study the removal of lead from aqueous solution by the use of tartrate-Mg-Al as an adsorbent.

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