A Natural Montmorillonite-Based Magsorbent as an Effective Scavenger for Cadmium Contamination

Akar, Sibel Tunali; Sayin, Fatih; Ozdemir, Irem; Tunc, Dilek

doi:10.1007/s11270-020-04743-3

Cited by 9 publications

(7 citation statements)

References 60 publications

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“…The observed https://doi.org/10.35193/bseufbd.1061422 e-ISSN:2458-7575 (https://dergipark.org.tr/tr/pub/bseufbd) 367 bands of the CCAC at 772, 686, 649, and 443 cm −1 were minimally affected by Ni (II) adsorption. Similar results can also be shown in previous studies using clay minerals [35,36]. These findings might be strong evidence for Ni (II) adsorption via different binding sites on the composite clay surface.…”

Section: A Characterizationsupporting

confidence: 91%

Clay-Biomass Composite: An Ecofriendly Hybrid Adsorbent for Effective Removal of Ni (II)

Sayin

2022

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, doğal kil minerali: Capsicumannuum (C. annuum) L. çekirdekleri bazlı kompozit bir adsorban (CCAC) hazırlanmıştır. CCAC'nin adsorpsiyon performansı, Ni (II) uzaklaştırma ve adsorpsiyon kapasitesi açısından değerlendirildi. Deneysel koşullar, metal çözeltisinin başlangıç pH'ı, CCAC miktarı, başlangıç metal iyonu konsantrasyonu ve temas süresi parametreleri araştırılarak optimize edilmiştir. CCAC ile Ni (II) adsorpsiyonu için optimum pH: 7.0, CCAC miktarı: 0.06 g ve temas süresi: 20 dakika olarak bulunmuştur. Adsorpsiyon izotermleri sık kullanılan modeller ile belirlenmiştir. Langmuir izoterm modeli ile maksimum tek tabakalı adsorpsiyon kapasitesi 126mg g-1 olarak belirlenmiştir. CCAC’nin fonksiyonel grupları ve yüzey morfolojisi sırasıyla FT-IR ve SEM analizleri kullanılarak araştırılmıştır. Bulgular, kimyasal ve kendiliğinden gerçekleşen bir Ni(II) adsorpsiyon sürecini işaret etmiştir. Son olarak, bu çalışmadan elde edilen tüm sonuçlar, basit olarak üretilebilen, maliyeti uygun ve sağlam bir kompozit adsorban olan CCAC'nin nikel iyonları ile kirlenmiş suların arıtılması için uygun bir aday olduğunu göstermektedir.

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Section: A Characterizationsupporting

confidence: 91%

Clay-Biomass Composite: An Ecofriendly Hybrid Adsorbent for Effective Removal of Ni (II)

Sayin

2022

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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“…Where N denotes the data point and from values obtained for %SSE, Co(II) gave smaller values for pseudo-second-order, whereas, Cd(II) demonstrates smaller values for pseudo-first-order kinetic model which further affirms the process of Co(II) ions and Cd(II) proceed through chemisorptions and physisorption respectively. From this result, it can be deduced that the process of Co 2+ uptake chemisorptions involving electron sharing or through functional groups [43], whereas the adsorption process of Cd 2+ is physissorption in nature [22]. The intrparticle diffusion kinetic model showed very good agreement with R 2 values greater than 0.9 (Table 2).…”

Section: Kinetics Evaluationsmentioning

confidence: 71%

“…The theoretical thermodynamic values for Co(II) and Cd(II) adsorption onto NC and CMNC surface were obtained from the standard free energy change (ΔG°), standard enthalpy changes (ΔH°) and standard entropy changes (ΔS°) which were deduced from the van't Hoff expressions listed in equations 13 to 15 [43,47]:…”

Section: Thermodynamics Modelingmentioning

confidence: 99%

“…Analysis of ΔS° revealed positive values and this confirms an increase in the degree of randomness during the sorption process at the clay/pollutant interface. Related literature documents on the influence of temperature and thermodynamic studies of different adsorbents had been reported for the elimination of heavy metals [43,48,55].…”

Section: Thermodynamics Modelingmentioning

confidence: 99%

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Chemically Activated Natural Clay as Effective Scavenger for Cd(II) and Co(II): Isotherms, Kinetics and Thermodynamic Evaluations

OFUDJE,

OGUNDIRAN,

AKANDE

et al. 2023

Preprint

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The investigation of the impact of sulphuric acid activation on natural clay in Cd(II) and Co(II) ions scavenger from aqueous medium under various experimental factors was carried out. The clay samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray Fluorescent (XRF), X-ray diffraction (XRD). The FT-IR results revealed the presence of prominent absorption bands of kaolinite at 3695.63, 3627.52, 1113.54, 918.50, 790.40, 537.93, and 446.95 cm-1. The adsorption process of Co(II) demonstrated good correlation with pseudo-second-order kinetic for both adsorbents, while that of Cd(II) depicted better conformity with pseudo-first-order kinetic model indicating physical adsorption mechanism. The maximum adsorption capacities predicted by Langmuir isotherm for natural clay (NC) and chemically modified natural clay (CMNC) are 86.341 and 158.760 mg/g for Co2+, 78.221 and 136.671 mg/g for Cd2+ respectively with the activated clay showing better adsorption capacity. Values of thermodynamic parameter of ΔH° for NC and CMNC was estimated and found to be 2.534 x 106 and 2.309 x 106 kJ mol−1 for Co2+ and 1.020 x 106 kJ mol−1 and 1.591 x 106 kJ mol−1 for Cd2+ thus indicating endothermic process. The results derived from this present study revealed that the chemically modified natural clay is better adsorbent for the scavenger of Co(II) and Cd(II) ions in contaminated water over natural clay.

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“…However, the N-element XPS spectrum showed a certain amount of C-N and N-O in CS-MMT. Besides, peaks of Si 2p(103eV) and Mg2p 55eVcorresponding to MMT were found in the spectrum of CS-MMT2 (Akar et al 2020), indicating the successful combination of CS and MMT.…”

Section: Xps Xrd and Ft-ir Analysismentioning

confidence: 94%

Ultra-efficient Copper Ions Adsorption of Chitosan-montmorillonite Composite Aerogel for Wastewater Treatment

Shang

Zhao

et al. 2021

Preprint

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The modified montmorillonite(MMT) has a two-dimensional stable and ordered lamellar structure. The addition of chitosan(CS) cross-links the two-dimensional sheets to build a three-dimensional network structure with a high specific surface area. We have prepared the best MMT-based water treatment materials that have been reported. This new type of aerogel can efficiently adsorb heavy metal ions in wastewater. The structure and performance of the composite material were characterized in this article. Besides, the adsorption kinetics, adsorption thermodynamics, pH influence, and recycling performance are all focused on. The adsorption equilibrium time of CS-MMT2 is 50 min. The removal rate of Cu2+ is as high as 98.21%. The maximum adsorption capacity is 86.95 mg/g. The adsorption process of Cu2+ by CS-MMT composite aerogel conforms to the quasi-second-order kinetic model and the Langrangian adsorption isotherm. After three cycles, the removal rate of Cu2+ by CS-MMT2 remained above 80%. This article also involves the discussion of the material's adsorption mechanism for Cu2+. This is a kind of environmentally friendly material that can be mass-produced, cheap, efficient, and excellent, which is of great significance to the development of environmental protection.

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A Natural Montmorillonite-Based Magsorbent as an Effective Scavenger for Cadmium Contamination

Cited by 9 publications

References 60 publications

Clay-Biomass Composite: An Ecofriendly Hybrid Adsorbent for Effective Removal of Ni (II)

Clay-Biomass Composite: An Ecofriendly Hybrid Adsorbent for Effective Removal of Ni (II)

Chemically Activated Natural Clay as Effective Scavenger for Cd(II) and Co(II): Isotherms, Kinetics and Thermodynamic Evaluations

Ultra-efficient Copper Ions Adsorption of Chitosan-montmorillonite Composite Aerogel for Wastewater Treatment

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