首页|Application of Synthetic Iron Oxyhydroxide with Influencing Factors for Removal of As(Ⅴ) and As(Ⅲ) from Groundwater

Application of Synthetic Iron Oxyhydroxide with Influencing Factors for Removal of As(Ⅴ) and As(Ⅲ) from Groundwater

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Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(Ⅴ) and As(Ⅲ) from the aquas media. Additionally, this investigation highlighted the synergistic effect of calci-um carbonate in conjunction with iron oxyhydroxide, resulting in enhanced removal efficiency. The ex-periment was conducted under various conditions: concentration, dosage, pH, agitation, and tempera-ture. Material characterizations such as Brunauer Emmett Teller, X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy were implied to understand adsorption mechanisms. The Langmuir model revealed optimal concentrations for As(Ⅴ) = 500 μg/L at pH-5 and As(Ⅲ) = 200 μg/L at pH-7, resulting in 95％ and 93％ adsorption efficiencies, respectively. Maximum adsorption capacities "qm" were found to be 1266.943 μg/g for As(Ⅴ) and 1080.241 μg/g for As(Ⅲ). Freundlich model demonstrated favorable adsorption by indicating "n > 1" such as As(Ⅴ) = 2.542 and As(Ⅲ) = 2.707; similarly, the speciation factor "RL < 1" for both species as As(Ⅴ) = 0.1 and As(Ⅲ) =0.5, respectively. The kinetic study presented a pseudo-second-order model as best fitted, indicating throughout chemisorption processes for removing As(Ⅴ) and As(Ⅲ). Furthermore, incorporating calci-um carbonate presented a significant leap in the removal efficiency, indicating As(Ⅴ) from 95％ to 98％and As(Ⅲ) from 93％ to 96％, respectively. Our findings offer profound motivation for developing ef-fective and sustainable solutions to tackle arsenic contamination, underscoring the exceptional promise of iron oxyhydroxide in conjunction with calcium carbonate to achieve maximum removal efficiency.

adsorptionarsenicAs(Ⅴ)As(Ⅲ)iron oxyhydroxideisothermskineticsgroundwater

Shakeel Ahmed Talpur、Muhammad Yousuf Jat Baloch、Chunli Su、Javed Iqbal、Aziz Ahmed、Hafeez Ahmed Talpur

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School of Environmental Studies, China University of Geosciences, Wuhan 430078, China

DiSPUTer, Department of Psychological, Health and Territory Sciences, University "G. d'Annunzio" Chieti-Pescara, 66100 Chieti, Italy

College of New Energy and Environment, Jilin University, Changchun 130021, China

School of Plant, Environment and Soil Sciences, Louisiana State University Agricultural Centre, Baton Rouge LA 70803, USA

Department od Engineering and Geology, University "G. d'Annunzio" Chieti-Pescara, 66100 Chieti, Italy

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National Natural Science Foundation of ChinaNational Natural Science Foundation of China

4217707842020104005

2024

10.1007/s12583-023-1862-y

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(3)
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