Adsorption and Reduction of Aqueous Cr by FeS-Modified Fe-Al Layered Double Hydroxide

Zhang, Shuangshuang; Zhang, Wenhui; Wan, Yazhen

doi:10.3390/su14010021

Cited by 6 publications

(1 citation statement)

References 49 publications

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“…Table 6 summarizes the comparison of recent adsorbents prepared with LDH as the substrate material for Cr (VI) removal. Zhang et al prepared FeS/LDH composites modified with FeCl2 and Na2S and reported a maximum adsorption capacity of 147.7 mg/g (Zhang et al 2022). However, they did not cover the regeneration and reuse of the adsorbent.…”

Section: Comparison With Other Adsorbent For Cr (Vi) Removalmentioning

confidence: 99%

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Sun,

Wang,

Zhang

et al. 2024

Preprint

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The problem of soil and water contamination caused by Cr discharged from dyeing, electroplating and metallurgical industries has become increasingly serious, which is a potentially great threat to the environment and public health. Therefore, it is essential to develop a quick, efficient and low-cost adsorbent for the remediation of Cr-contaminated wastewater. In this work, we successfully prepared MgAl-LDH/ commercial activated carbon nanocomposites (LDH-CAC) with hydrothermal. The effects of activated carbon type and loading on LDH-CAC were investigated. Moveover, we also have examined the adsorption capacity and adsorption behavior of LDH-CAC on Cr(VI), and proposed a potential removal mechanism. Lastly, the reusability of LDH-CAC was researched. The results showed that the prepared LDH-CAC@1 had the best removal performance at the commercial activated carbon type of CAC-103 and activated carbon loading of 1.0 g. The adsorption behavior study, on the other hand, indicated that LDH-CAC @1 could reach adsorption equilibrium within 10 min with a maximum adsorption capacity of 116.7 mg/g, which was significantly better than MgAl-LDH (10.7 mg/g) and CAC (21.3 mg/g). The primary removal mechanisms included adsorption-coupled reduction, ion exchange, surface precipitation, and electrostatic attraction. Reusability experiment revealed that the removal efficiency of LDH-CAC@1 decreased by 25.1% after four cycles, which illustrated the promising reusability of LDH-CAC@1.This study provides an effective adsorbent with a remarkably fast reaction, which has positive environmental significance for the treatment of Cr (VI) wastewater.

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Section: Comparison With Other Adsorbent For Cr (Vi) Removalmentioning

confidence: 99%

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Sun,

Wang,

Zhang

et al. 2024

Preprint

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Study of long‐term skid and wear resistance of waterborne epoxy resin‐SBR compound modified emulsified asphalt microsurfacing

Lu,

Zheng,

Gao

et al. 2023

J of Applied Polymer Sci

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As an eco‐friendly technology for pavement preventive maintenance, microsurfacing (MS) has the potential properties of cost‐saving and excellent performance benefits in repairing distress. MS also improves the surface function, especially skid resistance, of old pavements that have gradually decayed under the coupled effects of long‐term environment and loads. Reasonable assessments of the long‐term skid and wear resistance of the MS can provide support for accurate decision‐making on preventive maintenance, which in turn reduces maintenance costs and saves maintenance costs, and ensures traffic safety. To evaluate the long‐term skid and wear resistance of MS in different natural and traffic environments, this paper investigated the change of British pendulum number (BPN), rutting depth, and mass loss rate of waterborne epoxy resin‐SBR compound emulsified asphalt micro‐surfacing (WER‐SBR MEAMS) under different environmental factors and traffic conditions based on the self‐developed accelerated loading abrasion instrument. The factors considered in the experiment include temperature, rainfall, UV radiation, speed, and load. The results showed that temperature and vehicle speed had a detrimental effect on the durability of WER‐SBR MEAMS, which was more pronounced after 10,000 wear loading cycles. Reducing immersion time and slowing down the aging rate can improve the durability of WER‐SBR MEAMS. Further, the influence degrees of different factors on the skid and wear resistance of MS were evaluated using the gray correlation method. From the results of the gray correlation analysis, the correlation coefficients between external variables and BPN, rutting depth, and mass loss rate are all greater than 0.8, which indicate that all the variables involved have relatively obvious and regular effects on the skid and wear resistance of WER‐SBR MEAMS.

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Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr(VI) from aqueous solutions

Sun,

Wang,

Zhang

et al. 2024

Environ Sci Pollut Res

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Adsorption and Reduction of Aqueous Cr by FeS-Modified Fe-Al Layered Double Hydroxide

Cited by 6 publications

References 49 publications

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr from aqueous solutions.

Study of long‐term skid and wear resistance of waterborne epoxy resin‐SBR compound modified emulsified asphalt microsurfacing

Preparation of composites with MgAl-LDH-modified commercial activated carbon for the quick removal of Cr(VI) from aqueous solutions

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