Remediation of chromium-contaminated soil using delaminated layered double hydroxides with different divalent metals

Xu, Shuang; Zhang, Luping; Zhao, Jiawen; Cheng, Jian; Yu, Qian; Zhang, Shuwang; Zhao, Jialing; Qiu, Xinhong

doi:10.1016/j.chemosphere.2020.126879

Cited by 36 publications

(6 citation statements)

References 42 publications

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“…LDH3 and FeS/LDH3 were selected for characterization because of their better performance in removal efficiency, which is discussed in Section 3.2.1 below. As shown in Figure 2a, the pristine LDH3 has a monolayer sheet structure with an average size of 230 nm [28]. After The LDH3 and FeS/LDH3 used in this study were characterized by SEM.…”

Section: Characterizationsmentioning

confidence: 99%

“…In recent years, many researchers have used LDH as an absorbent to capture anionic pollutants in water: Gao et al found that the fixation ability of sand Mg-Al-LDH for Cr(VI) was 29.9 mg/g [27]. Xu et al found that the repairability of single-layer Ca LDH and Mg LDH for Cr(VI) was 56.2 mg/g and 47.9 mg/g, respectively [28]. Fe 3 O 4 -ZnAl LDH reported by Yang et al could fix Cr(VI) at 47.3 mg/g [29].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, some studies utilized ion-exchange properties of LDH to fix heavy metal anions between layers. Some studies used LDH as reactive media to enhance the reduction of Cr(VI) to the more stable and less toxic Cr(III) [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Wan

2021

Sustainability

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To remedy the widespread chromium (Cr) pollution in the environment, this study mainly used the ultrasonic-assisted co-precipitation and precipitation methods to prepare FeS-modified Fe-Al-layered double hydroxide (FeS/LDH) composite material. The experimental results showed that FeS/LDH has higher removal efficiency of Cr in aqueous solution and stronger anti-interference ability than unmodified LDH. Under the same reaction conditions, the removal efficiency of total Cr(Cr(T)) using LDH was 34.85%, and the removal efficiency of Cr(VI) was 46.76%. For FeS/LDH, the removal efficiency of Cr(T) and Cr(VI) reached 99.57% and 100%, respectively. The restoration of Cr(T) and Cr(VI) by FeS/LDH satisfied the Langmuir adsorption isotherm. The maximum adsorption capacity of Cr(T) and Cr(VI) achieved 102.9 mg/g and 147.7 mg/g. The efficient removal of Cr by FeS/LDH was mainly based on the triple synergistic effect of anion exchange between Cr(VI) and interlayer anions, redox of Cr(VI) with Fe2+ and S2−, and co-precipitation of Fe3+ and Cr3+.

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Section: Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Zhang

Wan

2021

Sustainability

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“…However, due to the special laminate structure of LDH, the dense multilayer packing and fewer functional group species limit its adsorption capacity. 11,12 BC can be used as the supporting framework of nanomaterials, which can effectively reduce the aggregation of LDHs. At the same time, BC has a large number of functional groups, which can further improve the adsorption effect of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

“…LDH is a well‐known anion exchanger, which is widely used in the remediation of various water pollutants because of its excellent anion exchange performance. However, due to the special laminate structure of LDH, the dense multilayer packing and fewer functional group species limit its adsorption capacity 11,12 . BC can be used as the supporting framework of nanomaterials, which can effectively reduce the aggregation of LDHs.…”

Section: Introductionmentioning

confidence: 99%

Preparation of bichar/layered double hydroxide@alginate aerogel as a highly efficient adsorbent for Cu²⁺ and Cd²⁺

Liang

Pan

Zhang

et al. 2022

J of Applied Polymer Sci

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Calcium cross‐linked layered double hydroxide‐bichar/alginate aerogel (LBCA) was synthesized by ultrasonic‐assisted hydrothermal and freeze‐drying method. The Mg‐Al layered double hydroxide (LDH) was successfully loaded on the bichar (BC) and the LDH‐BC was dispersed uniformly in the calcium alginate aerogel, which was confirmed by X‐Ray Diffraction, scanning electron microscopy and BET tests. The obtained LBCA was applied to remove the Cu2+ and Cd2+ in the aqueous solution. As compared with LDH nanosheets, removal rates of LBCA aerogel on Cu2+ and Cd2+ were ranged from 59% to 94% and 45% to 86%, respectively. The adsorption kinetic data accorded with the pseudo second‐order kinetic equation, and the isotherm data were in good agreement with the Langmuir model. Moreover, LBCA aerogel showed good regeneration ability, and raw materials for the fabrication of LBCA aerogel are abundant and low price.

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Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective

2021

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Agriculture soil plays a crucial role in sustainable development of human society. Unfortunately, soil quality is continuing degradation due to industrial and agricultural activities. Among them, agriculture soil contamination by heavy metals has become a serious threat to global food safety and human health. Because of low-cost, easy to implement, and fast effects, in situ chemical stabilization strategy has drawn great attention in soil remediation fields. However, since heavy metals are not removed from soil, it is still a great challenge to develop the cost-effective stabilizers with strong and longterm immobilization ability. Layered double hydroxides (LDHs) have been extensively applied in environmental fields owing to their unique structure. Very recently, LDHs have been used as amendment in in situ soil remediation for immobilization of heavy metals, exhibiting excellent long-term stability in practice application through trapping heavy metal ions into the lattice of LDHs layer. Given that the super-stable mineralization effect of LDHs for heavy metals, we summarize the structure of LDHs, key points of super-stable mineralization, practical challenges, and potential applications in other heavy metals pollution scenarios in this article, wishing that could provide new strategies and insights into rational designing of amendments for soil remediation.

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Remediation of chromium-contaminated soil using delaminated layered double hydroxides with different divalent metals

Cited by 36 publications

References 42 publications

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

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

Preparation of bichar/layered double hydroxide@alginate aerogel as a highly efficient adsorbent for Cu²⁺ and Cd²⁺

Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective

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Remediation of chromium-contaminated soil using delaminated layered double hydroxides with different divalent metals

Cited by 36 publications

References 42 publications

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

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

Preparation of bichar/layered double hydroxide@alginate aerogel as a highly efficient adsorbent for Cu2+ and Cd2+

Super‐stable mineralization effect of layered double hydroxides for heavy metals: Application in soil remediation and perspective

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Preparation of bichar/layered double hydroxide@alginate aerogel as a highly efficient adsorbent for Cu²⁺ and Cd²⁺