CTAB-functionalized δ-FeOOH for the simultaneous removal of arsenate and phenylarsonic acid in phenylarsenic chemical warfare

Lin, Zhaohui; Huan, Zhenglai; Zhang, Jinlan; Li, Jie; Li, Zhifeng; Guo, Pengfei; Zhu, Yuanrong; Zhang, Tingting

doi:10.1016/j.chemosphere.2021.133373

Cited by 17 publications

(6 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rapid mass loss in this stage could be connected with the degradation of CTAB molecules on the La@D surface. 41,46 The mass loss in the third stage (475−600 °C) is attributed to the degradation of CTAB molecules between the Laponite layers. Thus, the TG analysis implies that CTAB not only exchanges interlayer cations with Laponite but also modifies the outer surface of La@D.…”

Section: Resultsmentioning

confidence: 99%

“…Further, CTAB altered the hydrophilicity of La@D and endowed it with alkyl chain functional groups, which enabled it to form hydrophobic interactions with aromatic and aliphatic π-functional groups in CR molecules, increasing more hydrophobic adsorption sites. , In addition, the formation of hydrogen bonds between the pollutant molecules and the adsorbent surface may also be a key factor in the enhancement of the adsorption performance . Therefore, the adsorption mechanism of modified materials on CR can be explained by electrostatic attraction and hydrophobic effect. , …”

Section: Resultsmentioning

confidence: 99%

“…50 Therefore, the adsorption mechanism of modified materials on CR can be explained by electrostatic attraction and hydrophobic effect. 41,44…”

Section: Possible Adsorption Mechanismmentioning

confidence: 99%

“…Cetyltrimethylammonium bromide (CTAB) is a positively charged surfactant commonly used for surface modification of clay materials. , It has the advantages of environmental friendliness and low toxicity . Research has indicated that CTAB modification can increase the surface functional groups of the material and also enhance its affinity for organic pollutants to improve its anionic pollutant adsorption performance. , It has been pointed out that for layered materials, CTAB molecules can increase the spacing between layers to capture pollutant molecules …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cetyltrimethylammonium Bromide-Modified Laponite@Diatomite Composites for Enhanced Adsorption Performance of Organic Pollutants

Dai,

Liu,

Yang

et al. 2024

Langmuir

View full text Add to dashboard Cite

This work aims to enhance the adsorption performance of Laponite @diatomite for organic pollutants by modifying it with cetyltrimethylammonium bromide (CTAB). The microstructure and morphology of the CTAB-modified Laponite @ diatomite material were characterized using SEM, XRD, FTIR, BET, and TG. Furthermore, the influences of key parameters, containing pH, adsorbent dosage, reaction time, and reaction temperature, on the adsorption process were investigated. The kinetics, thermodynamics, and isotherm models of the adsorption process were analyzed. Finally, potential adsorption mechanisms were given based on the characterization. The research findings indicate that CTAB-La@D exhibits good adsorption performance toward Congo red (CR) over a broad pH range. The maximum adsorption capacity of CR was 451.1 mg/g under the optimum conditions (dosage = 10 mg, contact time = 240 min, initial CR concentration = 100 mg/L, temperature = 25 °C, and pH = 7). The adsorption process conformed to the pseudo-second-order kinetic model, and the adsorption isotherms indicated that the adsorption process of CR was more in line with the Langmuir model, and it was physical adsorption. Thermodynamic analysis illustrates that the adsorption process is exothermic and spontaneous. Additionally, the mechanisms of electrostatic adsorption and hydrophobic effect adsorption of CR were investigated through XPS and FTIR analysis. This work provides an effective pathway for designing high-performance adsorbents for the removal of organic dye, and the synthesized materials hold great capability for practical utilization in the treatment of wastewater.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…50 Therefore, the adsorption mechanism of modified materials on CR can be explained by electrostatic attraction and hydrophobic effect. 41,44…”

Section: Possible Adsorption Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cetyltrimethylammonium Bromide-Modified Laponite@Diatomite Composites for Enhanced Adsorption Performance of Organic Pollutants

Dai,

Liu,

Yang

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

“…According to Figure 4c, it is not difficult to see that PAA is present in molecular form at pHs less than 6. In the range of pH = 2-11, C 6 H 6 AsO 3 − is generated due to the loss of one proton, and in the range of pH = 5-8, the content of C 6 H 6 AsO 3 − would be close to 100% [43]. C 6 H 5 AsO 3 2− is formed by the loss of two protons when the pH greater is than 6, which may mean that when the pH is higher than the isoelectric point of ferrihydrite, deprotonation will occur on its surface and it will have a negative charge.…”

Section: Effect Of Main Parameters On the Adsorption Of Paamentioning

confidence: 99%

Simple Co-Precipitation of Iron Minerals for the Removal of Phenylarsonic Acid: Insights into the Adsorption Performance and Mechanism

Wang

Yang

et al. 2023

Molecules

Self Cite

View full text Add to dashboard Cite

In this study, three kinds of iron minerals, ferrihydrite, hematite, and goethite, were prepared by a simple coprecipitation method for the adsorption and removal of phenylarsonic acid (PAA). The adsorption of PAA was explored, and the influences of ambient temperature, pH, and co-existing anions on adsorption were evaluated. The experimental results show that rapid adsorption of PAA occurs within 180 min in the presence of iron minerals, and the adsorption process conforms to a pseudo-second-order kinetic model. The isothermal adsorption of PAA by ferrihydrite, goethite, and hematite agrees with the Redlich–Peterson model. The maximum adsorption capacities of PAA are 63.44 mg/g, 19.03 mg/g, and 26.27 mg/g for ferrihydrite, goethite, and hematite, respectively. Environmental factor experiments illustrated that an alkaline environment will significantly inhibit the adsorption of PAA by iron minerals. CO32−, SiO32−, and PO43− in the environment will also significantly reduce the adsorption performance of the three iron minerals. The adsorption mechanism was analyzed by FTIR and XPS, which indicated that ligand exchange between the surface hydroxyl group and the arsine group leads to the formation of an Fe-O-As bond, and electrostatic attraction between the iron minerals and PAA played an important role in the adsorption.

show abstract

Application of iron oxyhydroxide to stabilize As(V) and phenylarsonic acid in contaminated soil: adsorption and the relevance to bioavailability

Huan

Zhang

Guo

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

CTAB-functionalized δ-FeOOH for the simultaneous removal of arsenate and phenylarsonic acid in phenylarsenic chemical warfare

Cited by 17 publications

References 65 publications

Cetyltrimethylammonium Bromide-Modified Laponite@Diatomite Composites for Enhanced Adsorption Performance of Organic Pollutants

Cetyltrimethylammonium Bromide-Modified Laponite@Diatomite Composites for Enhanced Adsorption Performance of Organic Pollutants

Simple Co-Precipitation of Iron Minerals for the Removal of Phenylarsonic Acid: Insights into the Adsorption Performance and Mechanism

Application of iron oxyhydroxide to stabilize As(V) and phenylarsonic acid in contaminated soil: adsorption and the relevance to bioavailability

Contact Info

Product

Resources

About