Removal of Cd(II) and Pb(II) from aqueous solution by modified attapulgite clay

Huang, Runlin; Lin, Qintie; Zhong, Quanfa; Zhang, Xiaofeng; Wen, Xiaoqing; Luo, Haoyu

doi:10.1016/j.arabjc.2020.01.022

Cited by 82 publications

(34 citation statements)

References 86 publications

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“…High-temperature calcination of attapulgite also enhances the adsorption of Cd( ii ). 15,16 Calcination removes some of the adsorbed water, and impurities such as dolomite from the attapulgite, increasing the number of micropores, the specific surface area and adsorption sites of the attapulgite. 17…”

Section: Resultsmentioning

confidence: 99%

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

et al. 2022

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Section: Resultsmentioning

confidence: 99%

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

et al. 2022

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“…No 31-0783) were located at 2θ 13.7° (2 0 0), 16.3° (1 3 0), 19.8° (0 4 0), 21.3° (3 1 0), 28.0° (4 0 0), 30.98° (3 3 1), and 34.52–35.26° (0 6 1, 1 0 2 and 1 6 1). For natural mineral materials like attapulgite, it is common to contain a certain amount of quartz minerals [ 12 , 13 ]. After the adsorption saturation of Pb (AT@Pb), the position of XRD peaks remained basically stable, and two new peaks at 2θ 24.7° and 34.2° could be found.…”

Section: Resultsmentioning

confidence: 99%

“…As a crystalloid hydrous magnesium aluminium silicate mineral with a chain-layered structure (the theoretical chemical formula is Mg 5 Si 8 O 20 (OH) 2 (OH 2 ) 4 ·4H 2 O) , attapulgite has huge specific surface area, and provides adsorption and chemical activities that generate advantageous nano-effects. According to related references, attapulgite displays typical nanorod morphology and excellent Pb adsorption performance [ 12 , 13 , 14 ]. Pyrgaki et al, used raw and heat-treated attapulgite clay for Pb adsorption from aqueous solutions [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Making Pb Adsorption-Saturated Attapulgite with Excellent Photocatalysis Properties through a Vulcanization Reaction and Its Application for MB Wastewater Degradation

Zhang¹,

Chen

Cheng³

et al. 2022

IJERPH

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Attapulgite (AT) is a clay mineral with rich reserves in China, and it has good adsorption activity for Pb-containing wastewater. However, as a hazardous waste, the treatment of Pb adsorption-saturated attapulgite was quite difficult. In this work, through a simple vulcanization reaction, the waste Pb adsorption-saturated attapulgite (AT@Pb) was transformed into composite materials (AT@PbS) with good photocatalytic performance. After comprehensive material characterization (including XRD, TEM, XPS, and UV-Vis), the photocatalytic degradation performance and mechanism of AT@PbS for methylene blue (MB) were investigated. The results revealed that AT@PbS was a composite material of attapulgite nanorods (500–600 nm) and nanosquare PbS particles (80–100 nm). Additionally, AT@PbS displayed good visible light absorption, improved photo-electric properties, excellent photodegradation performance for MB, and recycling stability. Moreover, the energy band range of AT@PbS was about −0.043 V to 1.367 V. The photo-generated holes and their derived hydroxyl radicals were the main active species for MB degradation. This work not only provides a new approach to construct the composite photocatalyst, but also demonstrates the possibility of the comprehensive utilization of heavy metal adsorbents for wastewater degradation.

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“…The calculation formulas are as follows [ 29 ]:

where m (mg) represents the mass of attapulgite, and V (mL) represents the volume of the solution. To ensure the accuracy and repeatability of the collected data, all experiments were repeated three times, and the average value of the three experiments was used for subsequent data analysis; error bars were added to the graph to visually understand the degree of dispersion of the experimental data [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

Fang

Jiang

et al. 2022

IJERPH

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In order to remove toxic graphene oxide (GO) from aqueous solution, attapulgite (ATP) was used as adsorbent to recycle it by adsorption. In this paper, the effects of different pH, adsorbent mass, GO concentration, time and temperature on the adsorption of GO by attapulgite were studied, and the adsorption performance and mechanism were further explored by XRD, AFM, XPS, FTIR, TEM and SEM tests. The results show that when T = 303 K, pH = 3, and the GO concentration is 100 mg/L in 50 mL of aqueous solution, the removal rate of GO by 40 mg of attapulgite reaches 92.83%, and the partition coefficient Kd reaches 16.31. The adsorption kinetics results showed that the adsorption equilibrium was reached at 2160 min, and the adsorption process could be described by the pseudo-second-order adsorption equation, indicating that the adsorption process was accompanied by chemical adsorption and physical adsorption. The isotherm and thermodynamic parameters show that the adsorption of GO by attapulgite is more consistent with the Langmuir isotherm model, and the reaction is a spontaneous endothermic process. The analysis shows that attapulgite is a good material for removing GO, which can provide a reference for the removal of GO in an aqueous environment.

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Removal of Cd(II) and Pb(II) from aqueous solution by modified attapulgite clay

Cited by 82 publications

References 86 publications

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

Making Pb Adsorption-Saturated Attapulgite with Excellent Photocatalysis Properties through a Vulcanization Reaction and Its Application for MB Wastewater Degradation

Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution

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