Rapid Simultaneous Removal of Toxic Anions [HSeO3]−, [SeO3]2–, and [SeO4]2–, and Metals Hg2+, Cu2+, and Cd2+ by MoS42– Intercalated Layered Double Hydroxide

2017 ◽  
Vol 139 (36) ◽  
pp. 12745-12757 ◽  
Author(s):  
Lijiao Ma ◽  
Saiful M. Islam ◽  
Chengliang Xiao ◽  
Jing Zhao ◽  
Hongyun Liu ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Simultaneous Removal ◽  
Double Hydroxide

scholarly journals Synthesis, Characterization, and Application of Co-Al-Zn Layered Double Hydroxide/Hydrochar Composite for Simultaneous Removal of Cationic and Anionic Dyes

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Najma Memon ◽  
Urooj Kanwal ◽  
Abdullah Memon ◽  
Safia Sanam Memon ◽  
Saima Qayoom Memon
Keyword(s):  
Layered Double Hydroxide ◽  
Organic Dyes ◽  
Surface Heterogeneity ◽  
General Purpose ◽  
Simultaneous Removal ◽  
Surface Functional Groups ◽  
Anionic Dyes ◽  
Multivariate Technique ◽  
Characterization Studies ◽  
Double Hydroxide

Decontamination of organic dyes from wastewater requires efficient and compatible materials that must be able to remove dyes with different charges at the same time. In this study, composites of layered double hydroxide (LDH) and hydrochar (HC) were prepared and tested for use as general-purpose sorbents for the simultaneous removal of cationic and anionic dyes (i.e., methylene blue (MB), methyl orange (MO), and reactive yellow (RY)). Characterization studies reveal that the surface functional groups on composites are –OH, NO3, M–O bonds. It was observed that crystallinity of LDH decreased with an increasing amount of HC. Preliminary experiments showed that the dyes (i.e., MB, MO, and RY) were well removed simultaneously onto the composite with HC (2.0 g HC/prepared composite). This composite was selected for more experiments, and the adsorption efficiency was optimized by the multivariate technique using the response surface methodology (RSM). Removal efficiency of 100% was obtained for all three dyes with an adsorption capacity of 243, 5.3, and 16.3 µmol g−1 for MB, MO, and RY, respectively. Elovich’s initial intake rates (α) were 4,272, 441, and 99.5 mg g−1 min−1 for RY, MB, and MO, respectively. Data fitted in various models suggested second-order multiplex kinetics, where the surface heterogeneity response was sorbate dependent.

Simultaneous removal of phosphates and dyes by Al-doped iron oxide decorated MgAl layered double hydroxide nanoflakes

2019 ◽  
Vol 6 (8) ◽  
pp. 2615-2625 ◽  
Author(s):  
Shu Cheng ◽  
Luhua Shao ◽  
Jianhong Ma ◽  
Xinnian Xia ◽  
Yutang Liu ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Layered Double Hydroxide ◽  
Simultaneous Removal ◽  
Double Hydroxide

Study of the adsorption of phosphates, CR and MO in various systems by Al-doped iron oxide decorated MgAl layered double hydroxide nanoflakes.

Simultaneous removal of binary mixture dyes using mn - Fe layered double hydroxide coated chitosan fibers prepared by wet spinning

2021 ◽  
Vol 23 ◽  
pp. 100976
Author(s):  
Reza Khalili ◽  
Mehrorang Ghaedi ◽  
Mohammad Parvinnia ◽  
Mohammad Mehdi Sabzehmeidani
Keyword(s):  
Binary Mixture ◽  
Layered Double Hydroxide ◽  
Wet Spinning ◽  
Simultaneous Removal ◽  
Double Hydroxide

Simultaneous adsorption of trace sulfamethoxazole and hexavalent chromium by biochar/MgAl layered double hydroxide composites

2019 ◽  
Vol 16 (1) ◽  
pp. 68 ◽  
Author(s):  
Guowan Li ◽  
Zhujian Huang ◽  
Chengyu Chen ◽  
Hongcan Cui ◽  
Yijuan Su ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Human Health ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Metal Species ◽  
Simultaneous Removal ◽  
Simultaneous Adsorption ◽  
Potential Risks ◽  
Double Hydroxide ◽  
Double Hydroxides

Environmental contextWater contamination by antibiotics and heavy metals entails potential risks to both the environment and human health. Composite materials based on MgAl-layered double hydroxides and biochar simultaneously adsorbed the toxic sulfamethoxazole and CrVI metal species. These findings indicate that biochar/metal hydroxide composites could be valuable adsorbents for the simultaneous removal of trace antibiotics and metals from water. AbstractWater contamination by antibiotics and heavy metals has drawn wide attention because of the potential risks it poses to both the environment and human health. In this study, a series of adsorbents was successfully synthesised based on MgAl-layered double hydroxides (LDHs) and biochar (BC) derived from Pennisetum sinese Roxb. The batch adsorption experiment results showed that the obtained composites could effectively adsorb trace sulfamethoxazole (SMX) and CrVIsimultaneously. The simultaneous adsorption of trace SMX and CrVI are well described by the pseudo-second-order kinetics and Freundlich isotherm models. Characterisation of the composites after adsorption showed that the composites adsorbed SMX mainly by π-π bonds, hydrophobic interactions and hydrogen bonds. Electrostatic interaction, anion exchange, intraparticle diffusion and hydrogen bonding are the main mechanisms for CrVI adsorption onto the composites. This study indicates that the biochar/MgAl layered double hydroxide composites are promising adsorbents for the simultaneous removal of trace antibiotics and CrVI.

scholarly journals Study on Simultaneous Removal of Dye and Heavy Metal Ions by NiAl-Layered Double Hydroxide Films

ACS Omega ◽  
2020 ◽  
Vol 5 (34) ◽  
pp. 21805-21814
Author(s):  
Zhongchuan Wang ◽  
Luyao Zhang ◽  
Pengfei Fang ◽  
Lu Wang ◽  
Weiwei Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Layered Double Hydroxide ◽  
Heavy Metal Ions ◽  
Simultaneous Removal ◽  
Double Hydroxide
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