The Studies of Adsorption of Heavy Metal Ions of Lead and Copper by Distillers' Grains

The absorption of Cu2+ and Pb2+ in the heavy metal wastewater by distillers' grains can not only solve the problem of environmental pollution, but also change distillers' grains waste into resource. Structural characteristics of distillers' grains and its adsorption behaviors for the heavy metal ions of Cu2+ and Pb2+ were studied and effects of various parameters including pH, temperature, distillers' grains dose, initial Cu2+ and Pb2+ concentration and absorbed time on the absorption of Pb2+ and Cu2+ were evaluated. Sorption isotherms were also investigated. Results show that the rough surface, loose internal structure and hydroxy and amide groups of the distillers' grains are beneficial to the adsorption of Cu2+ and Pb2+ in the wastewater. The removal rate of the distillers' grains for Pb2+ (20.00 mg L−1) and Cu2+ (20.00 mg L−1) are, respectively, 96.72% and 87.70% under optimized conditions. The equilibrium sorption data are well demonstrated by Langmuir model.

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Research of nanostructural minerals – bentonites used in purification of mineral water from heavy metal ions (Cu2+, Pb2+, Cd2+, Zn 2+)

Bulletin of the National Engineering Academy of the Republic of Kazakhstan ◽

10.47533/2020.1606-146x.40 ◽

2020 ◽

Vol 4 (78) ◽

pp. 115-122

Author(s):

A. SH. BUKUNOVA ◽

◽

G. ZH. TURSBEKOVA ◽

L. B. IRISKINA ◽

M. K. ZHAMANBAEVA ◽

...

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Mine Water ◽

Heavy Metal Ions ◽

Structural Characteristics ◽

Mining Industry ◽

Bentonite Clay ◽

Acid Activation ◽

Exchange Cations ◽

Aluminum Ions

This paper presents the results of studies on the use of bentonite from the Taganskoye field for purification of mine water from the mining industry from heavy metal ions (MI). It has been established that the use of the thermo-acid-activated form of bentonite clay allows the removal of MI Cu2+, Pb2+, Cd2+, Zn2+ions from mine water by 99.6, 94.7, 98.9, 99.5 %, respectively, which ensures that the maximum permissible concentration of fishery is achieved at selected optimal conditions that were identified on the basis of an active experiment. A comparative analysis of the presented results of mass spectrometry and scanning electron microscopy shows that they are valid and do not contradict the obtained experimental data on the composition of exchange cations and structural characteristics in ultrafine mineral phases of bentonite clay samples of natural and thermo-acid activated forms It has been established that during acid activation of bentonite clays, the structure of montmorillonite is retained upon extraction of up to 80 % of magnesium, iron, and aluminum ions and is destroyed only upon their almost complete extraction.

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Investigation on adsorption behaviors of heavy metal ions (Cd2+, Cr3+, Hg2+ and Pb2+) through low-cost/active manganese dioxide-modified magnetic biochar derived from palm kernel cake residue

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2020.104467 ◽

2020 ◽

Vol 8 (6) ◽

pp. 104467

Author(s):

Panya Maneechakr ◽

Suthep Mongkollertlop

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Manganese Dioxide ◽

Heavy Metal Ions ◽

Low Cost ◽

Palm Kernel ◽

Palm Kernel Cake ◽

Magnetic Biochar ◽

Adsorption Behaviors

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Application of ANN to the Sorption Equilibrium Modelling of Heavy Metal Ions on Clinoptilolite

Ecological Chemistry and Engineering S ◽

10.2478/v10216-011-0017-8 ◽

2012 ◽

Vol 19 (2) ◽

pp. 227-237 ◽

Cited By ~ 2

Author(s):

Elwira Tomczak ◽

Wladyslaw Kaminski

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Sorption Isotherms ◽

Initial Step ◽

Training Data ◽

Sorption Equilibrium ◽

Network Training ◽

Mineral Sorbent ◽

Number Of Publications

Application of ANN to the Sorption Equilibrium Modelling of Heavy Metal Ions on Clinoptilolite The latest achievements in the field of mathematical modelling include the application of artificial neural networks (ANN). A growing interest in the ANN is confirmed by the number of publications devoted to the applicability of ANN in chemical, process and environmental engineering. A recent dynamic development of ANN provided an efficient and universal tool that is used to solve many tasks, including modelling, approximation and identification of objects. The initial step of applying the network to a given process consists in the determination of weights of the proposed neural network structure. This is performed on the basis of training data. A network that is properly trained allows correct information to be obtained on the basis of other data which have not been used in the network training. In most cases the network training is performed on the basis of a known mathematical model. However, the training of a network can be also performed using experimental data. In this paper, the sorption isotherms were predicted by means of a multilayer perceptron (MLP). Calculations were made using a training program written in Matlab, which took advantage of the Lavenberg-Marquardt procedure. In the last decade a growing interest is observed in inexpensive and very cheap adsorbents to remove heavy metal ions. Clinoptilolite is the mineral sorbent extracted in Poland used to remove heavy metal ions from diluted solutions. Equilibrium experiments were carried out to estimate sorptivity of a clinoptilolite and its selectivity towards Cu(II), Zn(II) and Ni(II) ions for multicomponent solution. Calculations with the use of MLP enabled description of sorption isotherms for one, two and three ions which were present at the same time in the solution. The network also enabled an analysis of sorption of the single ion, taking into account the effect of its concentration.

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Extended study of DETA-functionalized PGMA adsorbent in the selective adsorption behaviors and mechanisms for heavy metal ions of Cu, Co, Ni, Zn, and Cd

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2010.04.084 ◽

2010 ◽

Vol 350 (1) ◽

pp. 282-289 ◽

Cited By ~ 20

Author(s):

Changkun Liu ◽

Renbi Bai

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Selective Adsorption ◽

Extended Study ◽

Adsorption Behaviors

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Sorption performance of cysteine-modified bentonite in heavy metals uptake

Journal of the Serbian Chemical Society ◽

10.2298/jsc0907833f ◽

2009 ◽

Vol 74 (7) ◽

pp. 833-843 ◽

Cited By ~ 12

Author(s):

Hossein Faghihian ◽

Massoud Nejati-Yazdinejad

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Metal Binding ◽

Heavy Metal Ions ◽

Sorption Isotherms ◽

Local Clay ◽

Lead And Cadmium ◽

Sorption Parameters ◽

Thiol Ligand ◽

Heavy Metals Uptake

A local clay, bentonite (N-Ben), was modified by the biologically-based ligand, cysteine (Cys), through a simple sorption technique. The modified sorbent (Cys-Ben) demonstrated affinity for soft and moderately soft heavy metal ions (HMI), such as Cd(II) and Pb(II), probably as a result of the soft basic character of the thiol ligand side chains. The resulting modified system was effective for metal binding with capacities of 0.503 and 0.525 mmol g-1, for Pb(II) and Cd(II), respectively. Comparative batch experiments were performed for removing lead and cadmium from aqueous solutions. The sorption parameters were derived from a Langmuir fit to the sorption isotherms of the studied ions. The study showed that the sorption capacity of Cys-Ben was higher than that of N-Ben for these ions. The effect of pH was examined over the range 2.0-6.0. The sorption capacities of Cys-Ben showed that this modified clay is a good sorbent for the examined heavy metal ions.

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Simultaneous Removal of Heavy-Metal Ions by MnO2 Loaded D301 Resin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.2791 ◽

2011 ◽

Vol 255-260 ◽

pp. 2791-2796 ◽

Cited By ~ 2

Author(s):

Hong Mei Ma ◽

Zhi Liang Zhu ◽

Yong Qian Cheng

Keyword(s):

Aqueous Solution ◽

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Alkaline Earth ◽

Removal Rate ◽

Alkaline Earth Metals ◽

Simultaneous Removal ◽

High Concentration ◽

Solution Ph

MnO2-loaded D301 weak basic anion exchange resin was used as adsorbent to simultaneously remove Co2+, Ni2+, Cd2+, Zn2+ andCu2+ from aqueous solution contained high concentration of alkali and alkaline-earth metals ions. The effects of solution pH and coexistent ions on the adsorption were investigated. The results indicated that Co2+, Ni2+, Cd2+, Zn2+ andCu2+ can be simultaneously removed in the wide pH range of 3 to 8. The coexistence of PO43− decreased the heavy metal ions removal rate, but for other high concentrations coexistence cations and anions such as Na+, K+, Cl−, NO3−, SO42− and HCO3−, there is no significant impact on removal rate of heavy metals. The adsorption isotherm can be well described by Langmuir isotherm. The adsorption processes followed the pseudo first-order kinetics model. High adsorption capacity makes it a good promising candidate material for simultaneous removal of Co2+, Ni2+, Cd2+, Zn2+ andCu2+ from aqueous solution with the co-existence of high concentration of alkali and alkaline-earth metals ions.

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