Nano sized carbonized waste biomass for heavy metal ion remediation

Abstract Utilization of agricultural waste material with approach to enhance the heavy metal remediation properties by carbonizing the biomass at nano size particles has been explored in present investigation from aqueous solutions. In this study the lignocellulosic, nitrogenous agricultural waste biomass Delbergia sissoo pods (DSP) has been tried for sequestering of Cd (II), Pb (II) and Ni (II) metal ions from aqueous solutions. Batch experiments were performed for removal of targeted metal ions keeping in consideration the preliminary affecting parameters such as effect of adsorption dose, pH, initial metal ion concentration, stirring speed and contact time. The sorption studies were analyzed by using, Freundlic isotherm and Langmuir isotherm models. The kinetics of the process was evaluated by pseudo pseudo-first order and pseudo second order kinetic models. Studies reveal that the equilibrium was achieved with in 30 min of the contact time at optimized parameters. Analytical studies of biosorbent were done by means of FT-IR, SEM and XRD. Desorption experiments were carried out using HCl solution with a view to regenerate the spent adsorbent and to recover the adsorbed metal ions.

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Use of agro-waste (Musa paradisiaca peels) as a sustainable biosorbent for toxic metal ions removal from contaminated water

10.31221/osf.io/yrpvn ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Contact Time ◽

Metal Ion ◽

Equilibrium Concentration ◽

Ion Concentration ◽

Contaminated Water ◽

Musa Paradisiaca ◽

Percentage Removal ◽

Adsorbent Dose

A study of removal of heavy metal ions from heavy metal contaminated water using agro-waste was carried out with Musa paradisiaca peels as test adsorbent. The study was carried by adding known quantities of lead (II) ions and cadmium (II) ions each and respectively into specific volume of water and adding specific dose of the test adsorbent into the heavy metal ion solution, and the mixture was agitated for a specific period of time and then the concentration of the metal ion remaining in the solution was determined with Perkin Elmer Atomic absorption spectrophotometer model 2380. The effect of contact time, initial adsorbate concentration, adsorbent dose, pH and temperature were considered. From the effect of contact time results equilibrium concentration was established at 60minutes. The percentage removal of these metal ions studied, were all above 90%. Adsorption and percentage removal of Pb2+ and Cd2+ from their aqueous solutions were affected by change in initial metal ion concentration, adsorbent dose pH and temperature. Adsorption isotherm studies confirmed the adsorption of the metal ions on the test adsorbent with good mathematical fits into Langmuir and Freundlich adsorption isotherms. Regression correlation (R2) values of the isotherm plots are all positive (>0.9), which suggests too, that the adsorption fitted into the isotherms considered.

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Palm Kernel Shell as an effective adsorbent for the treatment of heavy metal contaminated water

Scientific Reports ◽

10.1038/s41598-019-55099-6 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 9

Author(s):

Rabia Baby ◽

Bullo Saifullah ◽

Mohd Zobir Hussein

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Metal Ion ◽

Heavy Metal Contamination ◽

Agricultural Waste ◽

Palm Kernel ◽

Second Order ◽

Isotherm Models ◽

Contaminated Water ◽

Pseudo Second Order

AbstractHeavy metal contamination in water causes severe adverse effects on human health. Millions of tons of kernel shell are produced as waste from oil palm plantation every year. In this study, palm oil kernel shell (PKS), an agricultural waste is utilized as effective adsorbent for the removal of heavy metals, namely; Cr6+, Pb2+, Cd2+ and Zn2+ from water. Different parameters of adsorptions; solution pH, adsorbent dosage, metal ions concentration and contact time were optimized. The PKS was found to be effective in the adsorption of heavy metal ions Cr6+, Pb2+, Cd2+ and Zn2+ from water with percentage removal of 98.92%, 99.01%, 84.23% and 83.45%, respectively. The adsorption capacities for Cr6+, Pb2+, Cd2+ and Zn2+ were found to be 49.65 mg/g, 43.12 mg/g, 49.62 mg/g and 41.72 mg/g respectively. Kinetics of adsorption process were determined for each metal ion using different kinetic models like the pseudo-first order, pseudo-second order and parabolic diffusion models. For each metal ion the pseudo-second order model fitted well with correlation coefficient, R2 = 0.999. Different isotherm models, namely Freundlich and Langmuir were applied for the determination of adsorption interaction between metal ions and PKS. Adsorption capacity was also determined for each of the metal ions. PKS was found to be very effective adsorbent for the treatment of heavy metal contaminated water and short time of two hours is required for maximum adsorption. This is a comprehensive study almost all the parameters of adsorptions were studied in detail. This is a cost effective and greener approach to utilize the agricultural waste without any chemical treatment, making it user friendly adsorbent.

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Yam Peels as Adsorbent for the Removal of Copper (Cu) and Manganese (Mn) in Waste Water

Nigerian Journal of Environmental Sciences and Technology - March 2018 ◽

10.36263/nijest.2017.02.0001 ◽

2017 ◽

Vol 1 (2) ◽

pp. 230-243 ◽

Cited By ~ 1

Author(s):

E. S. Isagba ◽

S. Kadiri ◽

I. R. Ilaboya

Keyword(s):

Waste Water ◽

Experimental Data ◽

Metal Ions ◽

Kinetic Models ◽

Contact Time ◽

Metal Ion ◽

Second Order ◽

Ion Concentration ◽

Order Kinetic ◽

Pseudo Second Order

This paper investigated the use of yam peel as a natural adsorbent for the removal of Copper (Cu) and Manganese (Mn) from waste water. The yam peels were thoroughly washed with distilled water, dried, pulverized and carbonized. The carbonized yam peel was then characterized for its particle sizes, moisture content, ash content, volatile matter, Methylene Blue number, Iodine number. The raw yam peels were prepared using the same procedure, but was not carbonized. The adsorption of Mn(II) and Cu(II) ions were investigated using adsorption experiment at room temperature. The effect of contact time, metal ion concentration and dosage were evaluated. The residual concentrations of the metal ions were determined by Atomic Absorption Spectrophotometer (AAS). Experimental data obtained were analyzed using Kinetic models and Isotherms such as Pseudo- First order kinetic models, Pseudo-second order kinetic models, Langmuir isotherms and Freundlich isotherm. The analysis showed that the pseudo-second order kinetic model best described the adsorption of the metal ions; ( Cu; r2 = 0.991 for RYP and r2 = 0.834 for AYP) and (Mn; r2 = 0.958 for RYP and r2 = 0.896 for AYP) and the experimental data best fit the Freundlich model; (Cu; r2 = 0.564 for RYP and r2 = 0.871 for AYP) and (Mn; r2 = 0.685 for RYP and r2 = 0.736 for AYP). Finally, optimum removal efficiencies of 30.54% for Mn(II) and 39.62% for Cu(II) were obtained for AYP at concentrations of 50mg/l and mass dosage of 1.0g, 120 minutes contact time and a pH of 6.8.

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Equilibrium sorption of divalent metal ions onto groundnut (Arachis hypogaea) shell: kinetics, isotherm and thermodynamics

10.31221/osf.io/d9x8h ◽

2019 ◽

Cited By ~ 1

Author(s):

Chem Int

Keyword(s):

Metal Ions ◽

Arachis Hypogaea ◽

Metal Ion ◽

Ion Concentration ◽

Isotherm Models ◽

Standard Entropy ◽

Order Kinetic ◽

Divalent Metal Ions ◽

Solution Ph ◽

Biosorption Process

The equilibrium, kinetics, and thermodynamics of the biosorption of Pb(II), Cd(II) and Zn(II) onto groundnut (Arachis hypogaea) shell were investigated under various physicochemical parameters. Optimisation studies were carried out using batch biosorption studies. The extent of the metal ion biosorption increased with increase in solution pH, initial metal ion concentration, dosage of biosorbent and contact time but decreased with the temperature of the system. The biosorption of each of the metal ions was found to be pH-dependent. Kinetic study showed that the metal ions biosorption process followed the pseudo-second-order kinetic model. The sorption of each metal ion was analysed with Freundlich and Langmuir isotherm models, in each case, the equilibrium data were better represented by Freundlich isotherm model. Thermodynamically, parameters such as standard Gibbs free energy (ΔG˚), standard enthalpy (ΔH˚), standard entropy (ΔS˚) and the activation energy (A) were calculated. The biosorption of each metal ion was spontaneous and the order of spontaneity of the biosorption process being Cd(II) > Zn(II) > Pb(II). Similarly, change in entropy was observed for each and the order of disorder is Cd(II) > Zn(II) > Pb(II).

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Kinetics and Isotherms of an Iron-Modified Montmorillonite/Polycaprolactone Composite Nanofiber Membrane for the Adsorption of Cu(II) Ions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.995.183 ◽

2020 ◽

Vol 995 ◽

pp. 183-188

Author(s):

Lester Raj Somera ◽

Ralph Cuazon ◽

John Kenneth Cruz ◽

Leslie Joy L. Diaz

Keyword(s):

Adsorption Capacity ◽

Contact Time ◽

Metal Ion ◽

Ion Concentration ◽

Isotherm Models ◽

Order Kinetic ◽

Nanofiber Membrane ◽

Modified Montmorillonite ◽

Sorption Energy ◽

Kinetics And Isotherms

Exposure to toxic concentrations of Cu (II) continues to rise as developing countries undergo rapid industrialization. Because of its high solubility in water, improperly disposed copper contaminate our water sources in its aqueous Cu (II) form. A nanofiber membrane composed of iron-modified montmorillonite (Fe-MMt) dispersed in polycaprolactone (PCL) was electrospun for the adsorption of Cu (II) ions. Kinetics and isotherm models were used to study the adsorption behavior of the fabricated membrane. The adsorption capacity of this membrane was observed as a function of increasing contact time and initial Cu (II) ion concentration. Kinetic studies showed that Cu (II) adsorption follows a pseudo-second order kinetic model, while isotherm studies determined the adsorption to be monolayer as described by the Langmuir isotherm. Furthermore, it was observed that the adsorption capacity increases with increasing contact time, and with increasing initial metal ion concentration up to a maximum value of 6.44 mgg-1. Lastly, the Dubinin-Kaganer-Radushkevich isotherm was used to calculate for the sorption energy and determine the type of adsorption. A sorption energy of-5.83 kJmol-1 was obtained, thus the adsorption was classified to be physical.

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Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies

Water Science & Technology ◽

10.2166/wst.2021.224 ◽

2021 ◽

Author(s):

Zeynab Karimi ◽

Reza Khalili ◽

Mohammad Ali Zazouli

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Vinyl Alcohol ◽

Metal Ion ◽

Heavy Metal Ions ◽

Adsorption Process ◽

Oxidative Polymerization ◽

Ion Concentration ◽

Poly Vinyl Alcohol ◽

Order Kinetic

Abstract In this study, polythiophene/Al2O3 (PTh/Al2O3) and polyaniline/Al2O3 (PAn/Al2O3) nanocomposites in the presence of poly(vinyl alcohol) (PVA) as the surfactant were synthesized via in situ chemical oxidative polymerization method in aqueous medium. The synthesized nanocomposites were characterized by Scanning electron microscopy (SEM), Fourier transform-infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Results indicated that the Al2O3 and poly(vinyl alcohol) influenced the properties of synthesized nanocomposites. The aim of this research was to investigate the sorption characteristic of polythiophene and polyaniline nanocomposites for the removal of heavy metal cations including Pb(II), Zn(II) and Cd(II) from aqueous solution. The factors that affected the adsorption equilibrium as well as the removal efficiency of the nanoadsorbents, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated in detail. From the kinetic results, it was concluded that the pseudo-second-order kinetic model was found to the best at describing the adsorption process for Pb(II), Zn(II) and Cd(II) on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. In addition, thermodynamic analysis suggests the endothermic and spontaneous nature of the present adsorption process with increased entropy on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. The results suggest polythiophene, polyaniline and their nanocomposites have great potential to be used as efficient absorbent for the removal of heavy metal ions from water.

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Use of sesame stalk biomass for the removal of Ni(II) and Zn(II) from aqueous solutions

Water Science & Technology ◽

10.2166/wst.2012.160 ◽

2012 ◽

Vol 66 (2) ◽

pp. 231-238 ◽

Cited By ~ 4

Author(s):

Çisem Kırbıyık ◽

Murat Kılıç ◽

Özge Çepelioğullar ◽

Ayşe E. Pütün

Keyword(s):

Aqueous Solutions ◽

Metal Ions ◽

Metal Ion ◽

Low Cost ◽

Second Order ◽

Solution Temperature ◽

Isotherm Models ◽

Order Kinetic ◽

Order Kinetic Model ◽

Pseudo Second Order

In this study an agricultural residue, sesame stalk, was evaluated for the removal of Ni(II) and Zn(II) metal ions from aqueous solutions. Biosorption studies were carried out at different pH, biosorbent dosage, initial metal ion concentrations, contact time, and solution temperature to determine the optimum conditions. The experimental data were modeled by Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin isotherm models. Langmuir model resulted in the best fit of the biosorption data. The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data and to evaluate rate constants. The best correlation was provided by the second-order kinetic model. The thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated for predicting the nature of adsorption. The experimental results showed that sesame stalk can be used as an effective and low-cost biosorbent precursor for the removal of heavy metal ions from aqueous solutions.

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The biosorption potential of waste biomass young fruit walnuts for lead ions: Kinetic and equilibrium study

Hemijska industrija ◽

10.2298/hemind150225030m ◽

2016 ◽

Vol 70 (3) ◽

pp. 243-255

Author(s):

Dragana Markovic ◽

Danijela Bojic ◽

Aleksandar Bojic ◽

Goran Nikolic

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

Metal Ion ◽

Low Cost ◽

Ion Concentration ◽

Isotherm Models ◽

Waste Biomass ◽

Sorption Data ◽

Biosorption Capacity ◽

Young Fruit

The biosorption potential of waste biomass young fruit walnuts (YFW) as a low-cost biosorbent, processed from liqueur industry, for Pb(II) ions from aqueous solution was explored. The structural features of the biosorbent were characterized by FTIR spectroscopy, which indicates the possibility that the different functional groups may be responsible for the binding of Pb(II) ions from aqueous solution. The effects of relevant parameters such as pH (2 - 6), contact time (0 - 120 min), biosorbent dosage (2 - 20 g), initial metal ion concentration (10 - 120 mg dm-3), at a temperature of 25(C with stirring (120 rpm) and a constant ionic strength of 0,02 mol dm-3 were evaluated in batch experiments. The sorption equilibrium of Pb(II) ion (when 84 % of metal ions were sorbed at an initial concentration of 15 mg dm-3) was achieved within the pH range 4 - 5 after 50 min. Kinetic data were best described by the pseudo-second order model. Removal efficiency of Pb(II) ion rapidly increased with increasing biosorbent dose from 2.0 to 8.0 g per dm-3 of sorbate. Optimal biosorbent dose was set to 6.0 g per dm3 of sorbate. An increase in the initial metal concentration increases the biosorption capacity. The sorption data of investigated metal ion are fitted to Langmuir, Freundlich and Temkin isotherm models. The equilibrium data were well fitted by the Langmuir isotherm model (R2 ? 0.990). The maximum monolayer biosorption capacity of waste biomass YFW for Pb(II) ion, at 25.0 ? 0.5?C and pH 4.5, was found to be 19.23 mgg-1. This available waste biomass is efficient in the uptake of Pb(II) ions from aqueous solution and could be used as a low-cost and an alternative biosorbent for the treatment of wastewater streams bearing these metal ions.

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ANALISA EFISIENSI PENYERAPAN ION LOGAM MENGGUNAKAN CANGKANG BUAH KETAPANG (Terminalia catappa L.)

Jurnal Katalisator ◽

10.22216/jk.v4i1.3358 ◽

2019 ◽

Vol 4 (1) ◽

pp. 42

Author(s):

Linda Hevira ◽

Rahmiana Zein ◽

Edison Munaf

Keyword(s):

Water Pollution ◽

Heavy Metals ◽

Heavy Metal ◽

Metal Ions ◽

Environmental Pollution ◽

Contact Time ◽

Metal Ion ◽

Functional Group ◽

Absorption Efficiency ◽

Ion Concentration

On cause of environmental pollution is the presence of heavy metals. Heavy metal such as Cd (II), Pb (II) and Cu (II) are the metals commonly found in water pollution. The untapped shell of ketapang fruit can be used as an absorbent because it has an active side that can bind to the metal ion. From the research with batch sistem was found that the absorption efficiency of metal Cd (II), Pb (II) and Cu (II) by shell of ketapang will be optimum if done at pH 6 with contact time 60 minute for ion Cd(II), 45 minute for ion Pb (II) and 75 minute for ion Cu. The optimum stirring speed of each is 100 rpm, 150 rpm and 100 rpm. The optimum absorption efficiency occured at concentration of 10 mg/L on metal Cd (II) and Pb (II) that are 86,38 % and 98,51 % while the Cu (II) metal at 5 mg/L concentration is 94,06 % with mass of ketapang 0.1 g,0.5 g and 0.5 g each metal ion. The metal ion concentration was analyzed by AAS and the dominant functional group binding metal ions was analiyzed by FTIR Salah satu penyebab pencemaran lingkungan adalah terdapatnya logam berat. Logam berat seperti Cd, Pb dan Cu merupakan logam yang sering ditemukan dalam pencemaran air. Cangkang buah ketapang yang tidak termanfaatkan dapat dijadikan sebagai penyerap karena mempunyai sisi aktif yang dapat berikatan dengan ion logam. Dari penelitian dengan sistem batch didapatkan bahwa efisiensi penyerapan ion logam Cd (II), Pb (II) dan Cu II) oleh cangkang buah ketapang akan optimum jika dilakukan pada pH 6 dengan waktu kontak 60 menit untuk ion Cd (II), 45 menit untuk ion Pb (II) dan 75 menit untuk ion Cu (II). Kecepatan pengadukan optimum masing-masingnya adalah 100 rpm, 150 rpm dan 100 rpm. Efisiensi penyerapan optimum terjadi pada konsentrasi 10 mg/L pada logam Cd(II) dan Pb (II) yaitu 86,38 % dan 98, 51 %, sedangkan logam Cu (II) terjadi pada konsentrasi 5 mg/L yaitu 94,06 % dengan massa cangkang buah ketapang 0.1 g, 0.5 dan 0.5 g pada masing-masing ion logam. Konsentrasi ion logam dianalisis dengan Spektrofotometri Serapan Atom dan gugus fungsi dominan yang mengikat ion logam dianalisis dengan FTIR.

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PENYERAPAN ION LOGAM Cr(III) DAN Cr(VI) DALAM LARUTAN MENGGUNAKAN KULIT BUAH JENGKOL (Pithecellobium jiringa (JACK) PRAIN.)

Jurnal Riset Kimia ◽

10.25077/jrk.v8i2.239 ◽

2015 ◽

Vol 8 (2) ◽

pp. 189

Author(s):

Zulkarnain Chaidir ◽

Qomariah Hasanah ◽

Rahmiana Zein ◽

Rahmiana Zein

Keyword(s):

Metal Ions ◽

Contact Time ◽

Metal Ion ◽

Agricultural Waste ◽

Freundlich Isotherm ◽

Absorption Capacity ◽

Isotherm Models ◽

Optimum Conditions ◽

Infra Red ◽

Metal Ion Uptake

Jengkol shells (Pithecellobium jiringa) an agricultural waste from typical Indonesian plant has been investigated for its ability to absorb heavy metal ions Cr VI and Cr III . Effect of pH, concentration, contact time, mass and the speed of stirring biosorben studied by extraction method. Concentration of metal ions Cr VI and Cr III was measured using Atomic Absorption Spectrophotometer (AAS). The optimum conditions for metal ion uptake of Cr VI occurs at pH 4, the concentration of 7000 mg/L, contact time of 60 minutes, 0.1 g biosorben mass and stirring speed 100 rpm. For the metal ions Cr III wa obtained conditions optimum at pH 5, the concentration of 1500 mg/L, contact time of 60 minutes, 0.1 g biosorben mass and stirring speed 100 rpm. Functional groups contained in the jengkol shells analyzed by Fourier Transform Infra Red (FTIR). Data equilibrium uptake of metal ions Cr VI and Cr III by the jengkol shells analyzed using two isotherm models , namely Langmuir and Freundlich isotherm models . The absorption of both the metal ions tend to follow the Langmuir isotherm models in which the absorption capacity of metal ions obtained for Cr VI ) and Cr III is 24.9376 mg / g and 39. 0625 mg /g . The optimum condition was applied to study the river Batang Arau at Padang city obtained a capacity of 15.065 mg/ g with 45 efficiency, 94 % for the uptake of metal ions Cr (total).

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