Preparation of ZnMgAl-Layered Double Hydroxide and Rice Husk Biochar Composites for Cu(II) and Pb(II) Ions Removal from Synthetic Wastewater

Shafiq, Muhammad; Alazba, A. A.; Amin, Muhammad

doi:10.3390/w15122207

Cited by 4 publications

(2 citation statements)

References 74 publications

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“…The sorption method has gained increasing attention due to its straightforward operation and exceptional removal efficacy [3]. However, the exorbitant cost of conventional adsorbents poses a significant challenge that must be addressed [4,5]. Therefore, the investigation of low-cost adsorbents synthesized from industrial waste has garnered significant interest [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Aminated Spherical SiO2 Synthesized from Fly Ash and Its Application for Pb2+ and Cu2+ Sorption

Chen,

Liu,

Wang

et al. 2024

Water

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Fly ash was utilized as raw material for the preparation of spherical SiO2 (SS), which was subsequently ammonified using APTES (H2NCH2CH2CH2Si(OC2H5)3) to obtain aminated spherical SiO2 (SSN). The physicochemical properties of SS and SSN were systematically characterized. Notably, SS exhibited a remarkable specific surface area and pore volume, enabling it to accommodate abundant nitrogen-containing groups. These functional groups served as crucial active sorption sites, significantly enhancing the sorption capacity of SiO2 for Pb2+ and Cu2+ ions. Thus, the removal efficiency was above 99.9% when using dosages of 4 and 6 g/L SSN in solutions containing 200 mg/L of Pb2+ and Cu2+, respectively. Additionally, SSN showed a higher theoretical maximum sorption capacity for Pb2+ and Cu2+ ions, as determined by the Langmuir isotherm model, with values of 185.2 mg/g and 86.2 mg/g, respectively. These results surpass those reported in previous studies on adsorbents derived from fly ash. The chemical reactions that occurred between the aqueous cations and nitrogen-containing groups were identified as the pivotal factors governing the sorption of Pb2+ and Cu2+. This study presents a practical approach to fly ash utilization, along with the effective removal of Pb2+ and Cu2+ from water.

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Section: Introductionmentioning

confidence: 99%

Aminated Spherical SiO2 Synthesized from Fly Ash and Its Application for Pb2+ and Cu2+ Sorption

Chen,

Liu,

Wang

et al. 2024

Water

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show abstract

“…В последнее время растет число публикаций, посвященных исследованию возможности СДГ сорбировать вещества, загрязняющие сточные воды, т. е. поллютанты. Сюда относятся вещества, в состав которых входят тяжелые металлы [6] или хроматы [7]. В экологическом контексте наиболее интересны исследования сорбционных свойств СДГ, в состав которых входят металлы, обладающие низкой токсичностью по отношению к водной среде: Mg, Al, Fe [8; 9].…”

Section: Introductionunclassified

Sorption properties of layered double hydroxides produced by ultrasonic exposure

Golubev,

Rubanik,

Rubanik

et al. 2023

FMT

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Layered double hydroxides (LDH) can be classified as promising materials due to the ease of synthesis, as well as their wide scope of application. However, the process of LDH synthesis, depending on the LDH chemical composition, can take from tens of hours to several days. It was previously identified that ultrasound exposure during the LDH production significantly reduces the synthesis time, and LDHs produced in this way are interesting in relation to the study of their physicochemical properties and sorption capacity. In this work, the authors produced Mg/Fe LDHs in nitrate form by the traditional method and by the combined action of ultrasound and increased hydrostatic pressure. The resulting samples are characterized by a complex of physicochemical methods of analysis, including scanning electron microscopy (SEM), infrared spectroscopy (IR), X-ray phase analysis (XRD), and thermal gravimetric analysis (TGA) with differential scanning calorimetry (DSC). Experiments were carried out to study the sorption capacity of the obtained Fe/Mg LDH samples in relation to chromate ions under normal conditions and under the influence of ultrasound, including in combination with increased hydrostatic pressure. A photoelectric photometer was used to obtain and analyze data with quantitative values of the sorption process. Data of comprehensive analysis of the finished product indicate that the synthesized material is a Mg/Fe layered double hydroxide. X-ray phase analysis identified that the LDH synthesis using ultrasound and pressure increases the crystallinity degree of the finished product. It has been found that the sorption properties of LDHs produced by the conventional method and LDHs produced under the influence of ultrasound and pressure are different. In Mg/Fe LDHs synthesized by the conventional method, chromate sorption proceeds better than in samples synthesized using ultrasonic treatment in combination with increased hydrostatic pressure. The study shows that the sorption process of the examined LDH samples is described by different mathematical models.

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Zn/Al LDH immobilized onto coconut fiber biochar for Pb (II) removal: effect of pyrolysis temperature

Awang,

Salleh,

Yusof

et al. 2024

Biomass Conv. Bioref.

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Preparation of ZnMgAl-Layered Double Hydroxide and Rice Husk Biochar Composites for Cu(II) and Pb(II) Ions Removal from Synthetic Wastewater

Cited by 4 publications

References 74 publications

Aminated Spherical SiO2 Synthesized from Fly Ash and Its Application for Pb2+ and Cu2+ Sorption

Aminated Spherical SiO2 Synthesized from Fly Ash and Its Application for Pb2+ and Cu2+ Sorption

Sorption properties of layered double hydroxides produced by ultrasonic exposure

Zn/Al LDH immobilized onto coconut fiber biochar for Pb (II) removal: effect of pyrolysis temperature

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