Efficient removal of uranium(VI) by layered double hydroxides supported nanoscale zero-valent iron: A combined experimental and spectroscopic studies

2019 ◽  
Vol 365 ◽  
pp. 51-59 ◽  
Author(s):  
Shujun Yu ◽  
Xiangxue Wang ◽  
Yafeng Liu ◽  
Zhongshan Chen ◽  
Yihan Wu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Spectroscopic Studies ◽  
Zero Valent Iron ◽  
Efficient Removal ◽  
Nanoscale Zero Valent Iron ◽  
Double Hydroxides

Enhanced removal of Cr(VI) from wastewater by nanoscale zero valent iron supported on layered double hydroxides

2020 ◽  
Vol 27 (6) ◽  
pp. 1701-1710
Author(s):  
Shifeng Zhao ◽  
Xin Fan ◽  
Junshan Yang ◽  
Hanhan Huang ◽  
Caifeng Xia ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Zero Valent Iron ◽  
Nanoscale Zero Valent Iron ◽  
Double Hydroxides

scholarly journals Lysine-Functionalized Layered Double Hydroxides For The Antibiotics’ Efficient Removal: Controllable Fabrication Via BBD Model And Removing Mechanism

2021 ◽  
Author(s):  
Yuying Hu ◽  
Susu Liu ◽  
Min Qiu ◽  
Xiaohuan Zheng ◽  
Xiaoming Peng ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Adsorption Mechanism ◽  
Electrostatic Attraction ◽  
Adsorption Behavior ◽  
Molar Ratio ◽  
Order Kinetic ◽  
Efficient Removal ◽  
Adsorption Processes ◽  
Controllable Fabrication ◽  
Double Hydroxides

Abstract Ly @ FeZn layered double hydroxides (LDHs) controllable fabrication based on Box-Behnken Design (BBD) model was fabricated, and presented stable and efficient removal performance for Ciprofloxacin (CIP), Norfloxacin (NOR) and Ofloxacin (OFL) removal. It should be noted that Ly @ FeZn had different adsorption behavior towards CIP, NOR and OFL. Furthermore, the Ly @ FeZn was characterized by SEM, XRD, FT-IR and XPS. Results revealed the optimized fabrication condition (temperature of 60 °C, Fe / Zn molar ratio of 0.5 and the lysine dosage of 5.8 mmol) for the removing efficient. The highest adsorption capacity of CIP, NOR and OFL were 193.83, 190.20 and 62.12 mg/g, respectively. Adsorption kinetics of both CIP and NOR were well simulated with the pseudo-first-order kinetic model, while that of OFL was well-described by the pseudo-second-order. Moreover, the adsorption thermodynamics of CIP and NOR on Ly @ FeZn indicated that the adsorption processes were exothermal, feasible and spontaneous. It was worth noting that the adsorption mechanism of Ly @ FeZn for CIP and NOR were the synergistic reaction of electrostatic attraction, chemical bonding and flocculation. On the other side, the adsorption behavior of OFL was relatively low, and the adsorption mechanism was only electrostatic attraction.

Coating layered double hydroxides with carbon dots for highly efficient removal of multiple dyes

2021 ◽  
pp. 127613
Author(s):  
Jiahui Ge ◽  
Lili Lian ◽  
Xiyue Wang ◽  
Xueling Cao ◽  
Wenxiu Gao ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Carbon Dots ◽  
Efficient Removal ◽  
Highly Efficient ◽  
Double Hydroxides

Mg–Al layered double hydroxides modified clay adsorbents for efficient removal of Pb 2+ , Cu 2+ and Ni 2+ from water

2016 ◽  
Vol 123 ◽  
pp. 134-140 ◽  
Author(s):  
Facui Yang ◽  
Shiqi Sun ◽  
Xiaoqi Chen ◽  
Yue Chang ◽  
Fei Zha ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Efficient Removal ◽  
Modified Clay ◽  
Double Hydroxides

scholarly journals Investigation on the Efficient Removal of U(VI) from Water by Sulfide Nanoscale Zero-valent Iron

2021 ◽  
Vol 79 (10) ◽  
pp. 1265
Author(s):  
Ziang Bai ◽  
Ruixing Chen ◽  
Hongwei Pang ◽  
Xiangxue Wang ◽  
Gang Song ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Efficient Removal ◽  
Nanoscale Zero Valent Iron

scholarly journals A Comparison among Synthetic Layered Double Hydroxides (LDHs) as Effective Adsorbents of Inorganic Arsenic from Contaminated Soil–Water Systems

Soil Systems ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 37
Author(s):  
Massimo Pigna ◽  
Antonio Violante ◽  
Antonio Giandonato Caporale
Keyword(s):  
Layered Double Hydroxides ◽  
Large Scale ◽  
Inorganic Arsenic ◽  
Cost Effective ◽  
Efficient Removal ◽  
Removal Capacity ◽  
Adsorption Capacities ◽  
Competing Anions ◽  
Double Hydroxides ◽  
Kinetics Of

The need for cost-effective adsorbents of inorganic arsenic (As(III) and As(V)) stimulates the academia to synthesize and test novel materials that can be profitably applied at large-scale in most affected areas worldwide. In this study, four different layered double hydroxides (Cu-Al-, Mg-Al-, Mg-Fe- and Zn-Al-LDH), previously synthesized and studied for As(III) removal capacity, were evaluated as potential adsorbents of As(V) from contaminated systems, in absence or presence of common inorganic anions (Cl−, F−, SO42−, HCO3− and H2PO4−). The As(V) desorption by H2PO4− was also assessed. Lastly, the As(V) adsorption capacities of the four layered double hydroxides (LDHs) were compared with those observed with As(III) in a complementary paper. All the LDHs adsorbed higher amounts of As(V) than As(III). Fe-Mg-LDH and Cu-Al-LDH showed higher adsorption capacities in comparison to Mg-Al-LDH and Zn-Al-LDH. The presence of competing anions inhibited the adsorption of two toxic anions according to the sequence: Cl− < F− < SO42− < HCO3− < < H2PO4−, in particular on Mg-Al-LDH and Zn-Al-LDH. The kinetics of As(V) desorption by H2PO4− indicated a higher occurrence of more easily desorbable As(V) on Zn-Al-LDH vs. Cu-Al-LDH. In conclusion, synthetic Cu- and Fe-based LDHs can be good candidates for an efficient removal of inorganic As, however, further studies are necessary to prove their real feasibility and safety.

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