Study on Heavy Metal in Soil Based on Spectral Second-Order Differential Gabor Transform

The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and infrared (IR) were used to identify the obtained tetrahydropyrimidine derivatives. Furthermore, batches of experiments were carried out to establish the adsorption equilibrium, kinetics, and thermodynamic variables of the tetrahydropyrimidine derivatives for toxic heavy Cd(II) ions. The adsorption data were simulated by applying the Langmuir manner, the Freundlich equation, the pseudo-first-order and pseudo-second-order equations. The adsorption procedure was discovered to be very influenced by PH. The removal of heavy metal ions reached a maximum value quickly within 6 min and the adsorption data better adjusted the Langmuir isotherm than that of the Freundlich isotherm. The maximum Cd(II) ions adsorption capacity was approximated to be 151.16 mg g−1 at 328 K and a pH of 6 to 7. It was found that the adsorption kinetics of Cd(II) ions obeyed pseudo-second-order adsorption kinetics. The examination of the thermodynamic variables of tetrahydropyrimidine derivative showed a spontaneous endothermic adsorption procedure. Otherwise, positive entropy values put forward a rise in the randomness at the solid-solution interface when heavy metal ions are adsorbed.

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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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Diffusion-Chemisorption and Pseudo-Second Order Kinetic Models for Heavy Metal Removal from Aqueous Solutions Using Modified and Unmodified Oil Palm Fruit Fibre

Chemical Science International Journal ◽

10.9734/csji/2018/41459 ◽

2018 ◽

Vol 23 (1) ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Anthony Obike ◽

Jude Igwe ◽

Chigbundu Emeruwa ◽

Kelechi Uwakwe ◽

Christopher Aghalibe

Keyword(s):

Heavy Metal ◽

Aqueous Solutions ◽

Oil Palm ◽

Kinetic Models ◽

Metal Removal ◽

Heavy Metal Removal ◽

Second Order ◽

Order Kinetic ◽

Palm Fruit ◽

Pseudo Second Order

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A Study on Adsorption of Heavy Metals with Zeolite and FeS Media

Journal of Korean Society of Environmental Engineers ◽

10.4491/ksee.2020.42.7.349 ◽

2020 ◽

Vol 42 (7) ◽

pp. 349-359

Author(s):

Gimin Lee ◽

Gyuri Kim ◽

Sungkyu Choi ◽

Tae-jin Lee

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Reaction Kinetics ◽

Adsorption Capacity ◽

Second Order ◽

Maximum Adsorption Capacity ◽

Adsorption Characteristics ◽

Removal Of Heavy Metals ◽

Pseudo Second Order ◽

Kinetics Of

Objectives:Adsorption characteristics in aqueous solution were investigated to effectively remove heavy metals by the crystallization of FeS and reaction kinetics were analyzed to compare with heavy metal adsorption characteristics of zeolite.Methods:The adsorption characteristics of each media were analyzed using Langmuir adsorption isotherm, and the adsorption reaction kinetics of heavy metals (Pb, Cu, Zn) on zeolite and FeS media were analyzed by a pseudo-first or pseudo-second order reaction kinetics.Results and Discussion:The maximum adsorption capacity of zeolite was highest in Pb, and the adsorption preference was in the order of Pb>Cu>Zn. In the case of FeS media, Cu was found to have a higher adsorption capacity than Pb or Zn, and the adsorption preference was observed to be Cu>Pb>Zn. It was found that the adsorption mechanism is based on chemical adsorption (chemisorption) because adsorption of each heavy metal onto zeolite or FeS media is more suitable for pseudo-second order kinetics.Conclusions:It was found that the removal of heavy metals through FeS media has a different pattern from zeolite, and when comparing the adsorption capacity of each media, it was found that FeS media is more effective for Zn or Cu except Pb.

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Kinetics and Adsorption Ions of Heavy Metal by Modified Alumino-Silicates

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.316.170 ◽

2021 ◽

Vol 316 ◽

pp. 170-174

Author(s):

Elena G. Filatova ◽

Yury N. Pozhidaev

Keyword(s):

Heavy Metal ◽

Rate Constant ◽

Heavy Metal Ions ◽

Second Order ◽

Adsorption Rate ◽

Order Model ◽

Adsorption Rate Constant ◽

Maximum Value ◽

Pseudo Second Order ◽

Kinetics Of

Adsorption isotherms of Ni (II) and Cu (II) ions by alumino-silicates, modified with N, N'-bis (3-triethoxysilylpropyl) thiocarbamide (BTM-3), and HCl, were obtained. The adsorption kinetics of heavy metal ions is studied, using the kinetic pseudo-first and pseudo-second order models. It is shown that, when alumino-silicates are modified, the rate and energy of adsorption increase. It is established that the kinetics of the adsorption of the studied ions is best described by a pseudo-second order model. The maximum value of the adsorption rate constant of 33.7∙10-5 g/ (mmol min) corresponds to nickel (II) ions for alumino-silicates, modified with HCl. The maximum value of the adsorption rate constant value of 2.91∙10-5 g/ (mmol min) for alumino-silicates, modified with BTM-3, corresponds to Cu (II) ions.

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Preparation of Calixarene-PI Nanofibers and Application as a Selective Adsorbent for Heavy Metal Ions

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501801300101 ◽

2018 ◽

Vol 13 (1) ◽

pp. 155892501801300

Author(s):

Xuchen Tao ◽

Quan Feng ◽

Hui He

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Adsorption Kinetics ◽

Heavy Metal Ions ◽

Selective Adsorption ◽

Physical Adsorption ◽

Second Order ◽

Kinetics Model ◽

Isothermal Model ◽

Pseudo Second Order

In order to utilize the adsorption selectivity of calixarenes towards heavy metal ions, calixarene functionalized polyimide (Calix-PI) fibers were prepared by three main synthesis procedures including preparation of the calixarene polyamide acid (Calix-PAA) spinning solution via amidation, fabrication of the Calix-PAA fibers by electrospinning, and preparation of the Calix-PI fibers via thermal imidization on the Calix-PAA fibers. The Calix-PI fibers were characterized by Fourier transform infrared spectroscopy, scanning electronic microscopy and thermogravimetric analysis. The Calix-PI fibers display selective adsorption on Pb(II), which is fit with the pseudo-second-order adsorption kinetics model and the Freundlich adsorption isothermal model. The rate constant of the pseudo-second-order adsorption kinetics model and the maximum Pb(II) uptake have all been calculated. The practical adsorption of Pb(II) on the Calix-PI fibers is mainly attributed to the monolayer chemical adsorption and slightly depended on the physical adsorption.

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STUDI KINETIKA ADSORPSI ION Fe (III) MENGGUNAKAN LIMBAH AMPAS SAGU

Molluca Journal of Chemistry Education (MJoCE) ◽

10.30598/mjocevol9iss1pp9-17 ◽

2019 ◽

Vol 9 (1) ◽

pp. 9-17

Author(s):

Batseba Taihuttu ◽

V Kayadoe ◽

A Mariwy

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Adsorption Capacity ◽

Contact Time ◽

Heavy Metal Ions ◽

Adsorption Process ◽

Second Order ◽

Adsorption Efficiency ◽

Adsorption Study ◽

Pseudo Second Order

Adsorption study of the adsorption of heavy metal ions from Fe (III) using sago dregs waste was carried out. adsorption was carried out in batches, with the mass of adsorbent is 1 g and the concentration of Fe (III) ion is 10 ppm. in this study variations in contact time were 60, 90, 120, 150 and 180 minutes to determine the kinetic suitable for the adsorption process of ion Fe (III) and the capacity and efficiency of sago dregs adsorption. The results showed that the adsorption of ion fe (III) using sago dregs followed pseudo second-order kinetics with R2 values that were closer to 1 that is 0,9651. adsorption of ion Fe (III) at optimum contact time of 90 minutes with adsorbent mass of 1 g obtained by adsorption capacity 0,3211 mg/g and the adsorption efficiency is 64,2%.

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NUMERICAL MODELING OF KINETICS OF HEAVY METAL SORPTION FROM POLLUTED WATER

Journal of Environmental Engineering and Landscape Management ◽

10.3846/16486897.2006.9636873 ◽

2006 ◽

Vol 14 (1) ◽

pp. 10-15 ◽

Cited By ~ 5

Author(s):

Dainius Paliulis

Keyword(s):

Heavy Metal ◽

Experimental Investigation ◽

Numerical Modeling ◽

Computer Program ◽

Negative Influence ◽

Second Order ◽

Polluted Water ◽

Sorption Method ◽

Pseudo Second Order ◽

Wastewater Pollutants

Water protection is one of the most important priorities of environmental protection. It is necessary to reduce pollution of wastewater in order to reduce pollution of drinking‐water and water pools. One of the most dangerous wastewater pollutants are heavy metals (HM). They have a negative influence on people and aquatic water systems. The paper analyses possibilities of the sorption method application for heavy metal elimination from waste‐water. Experimental investigation of HM sorption from water and numerical modeling usage possibilities for prognosis of the HM sorption kinetic process was carried out as well as experimental study of HM elimination efficiency dependence on sorption time of HM from wastewater, when using sorbents. Two pseudo kinetic models, i e the pseudo first‐ and second‐order models, were developed on the basis of experimental investigation. These models were applied in numerical modeling in the computer program PHOENICS. The results of the computer program PHOENICS and those of experimental investigation describing HM sorption from water were compared. After comparing the two pseudo models, it is determined that the pseudo second‐order model suits better for HM sorpti.

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Nickel (II) sorption from aqueous media by Agave salmiana as biosorbent

Journal of Applied Research and Technology ◽

10.22201/icat.16656423.2019.17.3.813 ◽

2019 ◽

Vol 17 (3) ◽

Author(s):

D. M. Sánchez Nava ◽

H. López González ◽

M. T. Olguín ◽

S. Bulbulian

Keyword(s):

Heavy Metal ◽

Aqueous Media ◽

Second Order ◽

Order Kinetic ◽

Sorption Data ◽

Maximum Sorption Capacity ◽

Maximum Sorption ◽

Agave Salmiana ◽

Order Kinetic Model ◽

Pseudo Second Order

In this work, the removal of nickel from aqueous solutions by Agave salmiana was investigated. For this purpose the removal of this heavy metal (Ni2+) was carried out in a batch system as a function of contact time, pH, and the initial concentration of the metallic specie in solution. The sorption data were fitted to pseudo-first order and pseudo-second order kinetic models to found the parameteres which describe the processes. It was found that the maximum sorption of the Agave for Ni2+ was at pH 10 and pseudo-second order kinetic model well described the biosorption behavior of this heavy metal by the non-living biomass. Furthermore, the maximum sorption capacity obtained from the isotherm was 10 mgNi/gAgave.

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