Hierarchical polydopamine coated cellulose nanocrystal microstructures as efficient nanoadsorbents for removal of Cr(VI) ions

Dong, L.; Deng, Ruijie; Xiao, Hongyan; Chen, Fang; Zhou, Yifan; Li, Jikang; Chen, Sheng; Yan, Bin

doi:10.1007/s10570-019-02529-3

Cited by 64 publications

(34 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In aqueous solution, Cr(III) forms sparingly soluble Cr(OH) 3 or Cr 2 O 3 precipitate, and can stably exist in the sediment [22]. Many efforts have been devoted to develop advanced materials for simultaneously transferring Cr(VI) anions into Cr(III) cations and adsorbing the later from the wastewater [8,16,[23][24][25][26]. For example, Wang et al [23] developed a core−shell magnetic Fe 3 O 4 @poly(m-phenylenediamine) particles and applied for chromium removal.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, PDA possesses strong reduction ability and has proved effective in reducing some metal ions such as Pt 3+ , Au 3+ and Ag + and graphene oxides [31,32]. Recently, PDA-based functional materials are a kind of adsorbents that have attracted much attention for Cr(VI) removal [25,26,[33][34][35]. However, the developed PDA-based adsorbents still suffer from relatively slow adsorption rate at low Cr(VI) concentration and show limited detoxifying effect of reduction Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater

et al. 2020

Self Cite

View full text Add to dashboard Cite

Cr(VI) containing industrial wastewaters are highly toxic and carcinogenic, and severely threats living creatures and the environment. Therefore, it is highly desired yet challenging to develop an available and economical adsorbent for simultaneously detoxifying Cr(VI) anions to Cr(III) ions and removing them from the wastewater. Here we propose a facile method for rapid removal of Cr(VI) ions from the wastewater by using a synthetic polydopamine microsphere (PPM) adsorbent with hierarchical porosity. The as-prepared PPM exhibits high Cr(VI) removal capacity of 307.7 mg/g and an outstanding removal efficiency. They can effectively decrease the Cr(VI) concentration to lower than 0.05 mg/L well below the limits for drinking water standard of WHO regulations in 60 s at pH 2. More importantly, PPMs can reduce the lethal Cr(VI) anions to Cr(III) ions with low toxicity, and simultaneously immobilize them on the matrices of PPMs.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The peaks at 588.79 eV and 576.91 eV belong to the Cr 2P1/2 and Cr 2p3/2 peaks of Cr(VI), respectively. The results reveal that part of Cr(VI) is reduced to Cr(III) by catechol in PDA[43]. The catechol in the corresponding PDA would be oxidized to carboxyl group.…”

mentioning

confidence: 89%

“…This implies that the adsorption process of Cr(VI) by LDHs@PDA-Fe(III) is endothermic. In addition, n <1 also indicates that Cr(VI) is favorably adsorbed on the surface of LDHs@PDA-Fe(III) [43]. In order to further study the thermodynamic characteristics of Cr(VI) adsorption by LDHs@PDA-Fe(III), the thermodynamic parameters of adsorption (ΔH 0 , ΔS 0 and ΔG 0 ) were calculated from the temperature-dependent adsorption isotherm.…”

Section: Adsorption Isotherm and Thermodynamicsmentioning

confidence: 99%

Fe(III) Complexed Polydopamine Modified Mg/Al Layered Double Hydroxide Enhances the Removal of Cr(VI) from Aqueous Solutions

et al. 2022

View full text Add to dashboard Cite

Herein, we report the preparation of Fe(III) complexed polydopamine modified Mg/Al layered double hydroxides composite material (LDHs@PDA-Fe(III)) and its application to the removal of Cr(VI) in aqueous solution. LDHs@PDA-Fe(III) was characterized and analyzed by field-emission scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron (XPS). The adsorption performance was studied through a series of adsorption experiments. Under the influence of pH, time, temperature, concentration, the maximum adsorption capacity obtained in the experiment is 683.4 mg/g. In addition, after 5 adsorption cycles, LDHs@PDA-Fe(III) still shows excellent adsorption capacity and stability. Combining adsorption experiments and characterization analysis, it is inferred that the adsorption of Cr(VI)

show abstract

“…To minimize health risks, these contaminants should be removed from the aquatic ecosystem. Chromium, used in chrome plating, textile dyeing, wood preservation, and metal finishing, is classified as a priority pollutant by the Environmental Protection Agency (EPA) due to its high toxicity even at low concentrations [ 10 , 12 , 21 ]. Therefore, it is critical to remove chromium (VI) to make water safe.…”

Section: Introductionmentioning

confidence: 99%

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Huang

Pan

et al. 2022

BMC Chemistry

View full text Add to dashboard Cite

This study was aimed to evaluate the performance of DESs functionalized peanut shell (PSD) as biosorbent for removing Cr(VI) from water. The effects of pretreatment, initial concentration, adsorption temperature, kinetics, adsorption isotherm, and thermodynamics were investigated. Scanning electron microscopy (SEM) and Point of Zero charge (pHpzc) techniques were used for characterization of the adsorbents. The results showed that the rigid structure of peanut shell was broken down after DESs modification and the point of zero charge was 6.02 for peanut shell and 6.84 for PSD, which exhibited a slightly acid character. Based on the comparisons of linear and nonlinear analysis of four kinetic models and four isotherms, the pseudo-second-order kinetic model was found to be suitable for describing the adsorption process. The presence of a boundary effect was observed within the range of research, indicating that internal diffusion was not the only rate-controlling step. The equilibrium data were well represented by the Langmuir model rather than the Freundlich, Temkin, and Dubinin–Radushkevich models. The maximum capacity derived was 5.36 mg g−1. Changes in Gibb’s free energy, enthalpy, and entropy revealed that Cr(VI) adsorption onto modified peanut-shell powders was a spontaneous and endothermic process. However, the highest desorption efficiency was only 8.77% by using NaOH as a desorbing agent. Graphical abstract

show abstract

Hierarchical polydopamine coated cellulose nanocrystal microstructures as efficient nanoadsorbents for removal of Cr(VI) ions

Cited by 64 publications

References 47 publications

Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater

Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater

Fe(III) Complexed Polydopamine Modified Mg/Al Layered Double Hydroxide Enhances the Removal of Cr(VI) from Aqueous Solutions

Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

Contact Info

Product

Resources

About