A novel approach for the removal of lead (II) ion from wastewater using Kaolinite/Smectite natural composite adsorbent

El-Naggar, I.M.; Ahmed, Sayed A.; Shehata, Nabila; Sheneshen, E. S.; Fathy, Mahmoud; Shehata, Amr M.

doi:10.1007/s13201-018-0845-0

Cited by 46 publications

(30 citation statements)

References 24 publications

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“…According to literature, the ionic radii of Cr 6+ ion (0.052 nm) is smaller than Fe 3+ ion (0.0645 nm) which makes it to diffuse faster to the pores of the adsorbents as a result of its smaller size. A similar trend was observed by Ogbu et al 34 and El-Naggar et al 35 who independently utilized 50%:50% mixture of kaolinite and sawdust and kaolinite/smectite composites to remove (Cd and Pb ions) and Pb ion from simulated wastewater after 45 min and 120 min respectively. Singh et al 28 reported and achieved 100% removal efficiency for Pb 2+ , Cd 2+ , As 3+ , and Hg 2+ using Fe 3 O 4 /ZnO composites from simulated wastewater after 24 h. Zolfaghari et al 18 achieved 87% Pb removal rate within 120 min using ZnO/coated nanoporous carbon.…”

Section: Resultssupporting

confidence: 80%

The role of kaolin and kaolin/ZnO nanoadsorbents in adsorption studies for tannery wastewater treatment

Mustapha

Tijani

Ndamitso

et al. 2020

Sci Rep

115

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In the present study, comparative studies of kaolin and kaolin/ZnO nanocomposites for the adsorption of Cr(VI), Fe(III), COD, BOD, and chloride from tannery wastewater were investigated. ZnO nanoparticles and kaolin/ZnO nanocomposites were prepared by sol-gel followed by wetimpregnation methods. The prepared adsorbents were characterized using different analytical tools such as X-ray diffraction, Fourier transforms infrared, high-resolution transmission electron microscopy, energy dispersive spectroscopy, selective area electron diffraction and Brunauer Emmett-Teller (BET) and X-ray Photoelectron Spectroscopy (XPS). The HRSEM/EDS/XPS analysis confirmed successful immobilization of clay structural network on the lattice layers of zincite hexagonal structure of ZnO nanoparticles. BET measurement showed an increase in the surface area of kaolin/ ZnO nanocomposites (31.8 m 2 /g) when compared to kaolin (17 m 2 /g). Batch adsorption studies were carried out by varying the parameters such as contact time, adsorbent dosage and temperature. The maximum removal of Cr(VI) (100%), Fe(III) (98%), COD (95%), BOD (94%) and Chloride (78%) was obtained at 15 min by kaolin/ZnO composites. While 78% Cr(VI), 91% Fe(III), 91% COD, 89% BOD and 73% Chloride were removed by kaolin under the same conditions. The kaolin/ZnO nanocomposites exhibited better adsorption performance than kaolin due to higher surface area of the former than the latter. It was found that the Jovanovic isotherm model fitted the adsorption experimental data most with the highest correlation (R 2 > 0.99) for both nanoadsorbents and indicate the occurrence of adsorption on monolayer and heterogeneous surfaces. The mechanism for the adsorption of metal ions in tannery wastewater onto the nano-adsorbents was examined using Weber Morris intra-particle diffusion model and Boyd plot which showed that the adsorption process was both intra-particle and film diffusion controlled. The thermodynamic parameters such as enthalpy change showed that that adsorption of metal ions and other parameters was feasible, spontaneous and endothermic. The ZnO/ clay nanocomposites exhibited excellent recyclable and re-useable properties even after six repeated applications and can, therefore, be applied in wastewater treatment for removal of heavy metals and other physicochemical parameters. Environmental contamination via natural and anthropogenic activities have been recognized as one of the major global problems confronting the human race and aquatic species. Industrial manufacturing processes utilize a high amount of clean water during operations and at the same time generate and discharge a large volume of untreated wastewater into water bodies. Specifically, industrial tanning process which transforms animal hides and skins into leather generate highly turbid, coloured and foul-smelling wastewater containing different organic

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Section: Resultssupporting

confidence: 80%

The role of kaolin and kaolin/ZnO nanoadsorbents in adsorption studies for tannery wastewater treatment

Mustapha

Tijani

Ndamitso

et al. 2020

Sci Rep

115

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“…The dimensionless thermodynamic equilibrium constant was computed using the adsorption equilibrium constant as in Kegl et al (2019) and Kegl et al (2020) but modified to our study as Eq. (8) before computing the associated thermodynamic parameters using equations from (9, 10, 11) (El-Aila et al, 2016;El-Naggar et al, 2019;Gao et al, 2020;Kumar, 2014;Sayago et al, 2020).…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

“…However, this contradiction which was observed by other researchers mentioned above as well further gives evidence that the adsorption process is not just a "simple adsorption process". El-Naggar et al (2019) studied the removal of Pb 2þ ions from wastewater using a natural composite adsorbent called Kaolinite/Smectite. They observed that increasing temperature increases adsorption capacity.…”

Section: Adsorption Studiesmentioning

confidence: 99%

“…However, most proposed adsorbents have not been economical due to separation and regeneration, and so research still continues to find the ideal adsorbent for heavy metal ion removal. El-Naggar et al (2019) investigated the adsorption of Pb 2þ ions from wastewater using Kaolinite/Smectite natural composite adsorbents and observed positive results at pH of 2, a linear relationship between adsorption rate and temperature from 30 to 75 C, and a linear relationship up to 100 mg/L then an inverse relationship from 100 to 500 mg/L with adsorption capacity, and their adsorption process followed Freundlich isotherm (R 2 ¼ 1). Higher pH led to H þ ions adsorption instead of Pb 2þ ions.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Manyangadze

Chikuruwo

Narsaiah

et al. 2020

Heliyon

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Lead is a heavy metal that is bio accumulative and non-biodegradable that poses a threat to our health when it exists in excess in our bloodstream. It has found its way into wastewater from mostly chemical industrial processes. In this article, we investigated the adsorption and hence removal of lead (II) ions from wastewater in order to purify it for re-use in industrial processes or for plant and animal use. We synthesized nano silica hollow spheres (NSHS) and used them as adsorbents to remove lead ions from wastewater. When we characterized the NSHS using X-Ray diffraction, the amorphous nature of silica was evident with average crystal size of 39.5 nm. Scanning electron microscopy was used to determine the morphology of the adsorbent and the particles were found to be spherical in shape within a size range of 100-200 nm. Thermogravimetric analysis was used to determine the mass loss of NSHS which was~2% at 800 C. Our experimental results from adsorption studies showed that there was a linear relationship between temperature (27-60 C) and adsorption efficiency and an inverse relationship between initial metal concentration (50-300 mg/L) and adsorption efficiency. At a maximum temperature of 60 C and maximum initial metal concentration of 300 mg/L, the adsorption capacity was 200 mg/g and 262 mg/g, respectively while the adsorption efficiency was 99.6% and 87.4%, respectively. Our equilibrium and thermodynamic results revealed that the process was better modelled by the Langmuir adsorption isotherm (q max ¼ 266.89 mg/g and b ¼ 0.89 L/mg). The adsorption process was both endothermic (ΔH ¼ 97 kJ/mol) and spontaneous (ΔG ¼-22 kJ/mol). We can conclude that we were able to successfully synthesize NSHS, use them to remove lead (II) ions and the produced NSHS have a capacity that is higher than most other adsorbents investigated by other researchers.

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“…Additional promise for metal attenuation resides in the application of locally abundant, affordable, and renewable organic materials. This has been explored globally in places as diverse as Taiwan [8], Turkey [9], China [10,11]), India [12][13][14][15], Nigeria [16], Serbia [17], Saudi Arabia [18,19], Egypt [20], Jordan [21], Poland [22], and Malaysia [23], among many others. Since earlier publications (e.g., [24]), several reviews have synthesized these findings and applications with a particular focus on the developing world, including those conducted by [14,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Inexpensive Organic Materials and Their Applications towards Heavy Metal Attenuation in Waters from Southern Peru

García‐Chevesich

García

Martínez

et al. 2020

Water

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There is interest in using locally available, low cost organic materials to attenuate heavy metals such as Cd, Cr, Cu, Hg, Ni, Pb, and Zn found in surface waters in Peru and other developing regions. Here we mesh Spanish language publications, archived theses, and prior globally available literature to provide a tabulated synthesis of organic materials that hold promise for this application in the developing world. In total, nearly 200 materials were grouped into source categories such as algae and seashells, bacteria and fungi, terrestrial plant-derived materials, and other agricultural and processing materials. This curation was complemented by an assessment of removal potential that can serve as a resource for future studies. We also identified a subset of Peruvian materials that hold particular promise for further investigation, including seashell-based mixed media, fungal blends, lignocellulose-based substrates including sawdust, corn and rice husks, and food residuals including peels from potatoes and avocadoes. Many studies reported percent removal and/or lacked consistent protocols for solid to liquid ratios and defined aqueous concentrations, which limits direct application. However, they hold value as an initial screening methodology informed by local knowledge and insights that could enable adoption for agriculture and other non-potable water reuse applications. While underlying removal mechanisms were presumed to rely on sorptive processes, this should be confirmed in promising materials with subsequent experimentation to quantify active sites and capacities by generating sorption isotherms with a focus on environmental conditions and specific contaminated water properties (pH, temperature, ionic strength, etc.). These organics also hold promise for the pairing of sorption to indirect microbial respiratory processes such as biogenic sulfide complexation. Conversely, there is a need to quantify unwanted contaminant release that could include soluble organic matter and nutrients. In addition to local availability and treatment efficacy, social, technical, economic, and environmental applicability of those materials for large-scale application must be considered to further refine material selection.

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A novel approach for the removal of lead (II) ion from wastewater using Kaolinite/Smectite natural composite adsorbent

Cited by 46 publications

References 24 publications

The role of kaolin and kaolin/ZnO nanoadsorbents in adsorption studies for tannery wastewater treatment

The role of kaolin and kaolin/ZnO nanoadsorbents in adsorption studies for tannery wastewater treatment

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates

Inexpensive Organic Materials and Their Applications towards Heavy Metal Attenuation in Waters from Southern Peru

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