Study on Mn-Fe-LDH Material for Remediation of Arsenic Contaminated Water

2017 ◽  
Vol 730 ◽  
pp. 200-205 ◽  
Author(s):  
Wei Zhuo Wang ◽  
Jian Min Bian
Keyword(s):  
Layered Double Hydroxides ◽  
Arsenic Removal ◽  
Adsorption Property ◽  
Toxic Substances ◽  
Arsenic Adsorption ◽  
Exchange Method ◽  
Main Method ◽  
Series Of Experiments ◽  
Removal Of Arsenic ◽  
Double Hydroxides

Arsenical water pollution refers to the toxicity of arsenic. The form of trivalent arsenic has been seen as more toxic substances, which will be great improved by the manmade pollution. Compared with other technologies, adsorption is the main method of removal of arsenic pollution, for its higher efficiency and lower cost. Based on the adsorption theory and ion exchange method, the layered double hydroxides material containing ferric iron and manganese (Mn-Fe-LDH) was prepared to remove arsenic in this paper. We have designed some experiments for synthesis of this material. The reaction process and elemental compositions has been studied and the adsorption property of arsenic adsorption onto layered double hydroxides was verified through a series of experiments. Study shows that the Mn-Fe-LDH material can be used as a good adsorbent material for its high removal efficiency. The adsorption capacity of the Mn-Fe-LDH material is not affected by the interference of pH and Cl-/SO42- ion strength. It was a broad prospect for the development and application of arsenic removal materials.

Arsenic adsorption on layered double hydroxides biochars and their amended red and calcareous soils

2020 ◽  
Vol 271 ◽  
pp. 111045 ◽  
Author(s):  
Xing Gao ◽  
Yutao Peng ◽  
Lili Guo ◽  
Qiong Wang ◽  
Chung-Yu Guan ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Calcareous Soils ◽  
Arsenic Adsorption ◽  
Double Hydroxides

Adsorption Property of MgAl-NO3 Layered Double Hydroxides to Methyl Orange

2013 ◽  
Vol 750-752 ◽  
pp. 1738-1741
Author(s):  
Jian Hui Yan ◽  
Lu Hong Zhang ◽  
You Gen Tang ◽  
Li Zhang
Keyword(s):  
Methyl Orange ◽  
Adsorption Capacity ◽  
Hydrothermal Method ◽  
Layered Double Hydroxides ◽  
Adsorption Property ◽  
Molar Ratio ◽  
Adsorption Performance ◽  
Ft Ir ◽  
Double Hydroxides

MgAl-NO3 LDHs were prepared by hydrothermal method. The as-prepared samples were characterized by SEM, XRD and FT-IR. The adsorption performance of MgAl-NO3 LDHs to methyl orange (MO) was studied. The effects of Mg/Al molar ratio on the adsorption performance of MgAl-NO3 LDHs were investigated. The results showed that the highest adsorption capacity of 499.98mg/g was obtained when the Mg/Al molar ratio was at 2.5:1.

Removal of Arsenic from Groundwater Using Nano-Metal Oxide Adsorbents

2017 ◽  
Vol 751 ◽  
pp. 766-772 ◽  
Author(s):  
Phitchaya Muensri ◽  
Supamas Danwittayakul
Keyword(s):  
Particle Size ◽  
Arsenic Removal ◽  
Average Particle Size ◽  
Sample Volume ◽  
Adsorptive Capacity ◽  
Hydroxyl Groups ◽  
Average Particle ◽  
Human Beings ◽  
Arsenic Adsorption ◽  
Removal Of Arsenic

Arsenic can be found in groundwater that is harmful to human beings. In this research, we present the potential uses of ZnO microparticles, ZnO and TiO2 nanoparticles to removal arsenic in groundwater. The experiments of %arsenic removal upon using ZnO microparticles ZnO and TiO2 nanoparticles were conducted in 25 mL of sample volume with 0.05 g of nanoadorpbents at pH 6. We found that the efficiency of arsenic adsorption increased with a reduction of particle size of theadsorbents. Upon using nanoadsorbents to remove arsenic from the solutions with the concentrations of 200-2000 ppb, we found that the %removal of arsenic decreased from 100% to 84% for ZnO nanoparticles and 100% to 97% for TiO2 nanoparticles. Adsorption capacities upon using ZnO and TiO2 nanoparticles were 0.85 and 0.99 mg of arsenic/g of sorbents, respectively. TiO2 nanoparticles exhibited a better adsorption ability to arsenic than that ZnO because TiO2 nanoparticles had a smaller average particle size and larger surface area allowed the adsorption of hydroxyl groups on the surface that could bond with in coming HAsO42- via hydrogen bonding resulting in a better arsenic adsorptive capacity.

scholarly journals Adsorption of arsenic and phosphate from groundwater onto a calcined laterite as fixed bed in column experiments

2020 ◽  
Vol 8 (2) ◽  
pp. 227-243
Author(s):  
Yacouba Sanou ◽  
Raymond Kabore ◽  
Samuel Pare
Keyword(s):  
Arsenic Removal ◽  
Arsenic Concentration ◽  
Fixed Bed ◽  
Column Experiments ◽  
Arsenic Adsorption ◽  
Experimental Conditions ◽  
Ph Values ◽  
Naoh Solution ◽  
Removal Of Arsenic ◽  
Maximum Removal

This work was focused on laterite soil as adsorbent for the removal of arsenic and phosphate from groundwater using column experiments. Results revealed a decrease of arsenic removal efficiency from 100 to 79% with flow rate increasing. Maximum removal of 100% for arsenic and 85% for phosphates was obtained for pH values between 3.5 and 6. The increase of initial arsenic concentration and phosphate amount caused an increase of arsenic adsorption up to 24 µg/g while 58.5 µg/g for phosphate. NaOH solution could desorb 86.8% of arsenic and the reuse of regenerated laterite indicated its efficiency in same experimental conditions.

Methotrexate intercalated into layered double hydroxides via ion exchange method and the corresponding bioassay explore

2014 ◽  
Vol 44 (12) ◽  
pp. 1966-1975
Author(s):  
Tao JIANG ◽  
XiaoDong LI ◽  
ShuPing LI ◽  
MeiGui ZENG ◽  
ZhenLei LIU
Keyword(s):  
Ion Exchange ◽  
Layered Double Hydroxides ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Double Hydroxides

Boron Adsorption by Cellulose Supported Layered Double Hydroxides

2013 ◽  
Vol 807-809 ◽  
pp. 1380-1383 ◽  
Author(s):  
Chun Yan Yan ◽  
Wen Tao Yi
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Contact Time ◽  
Boron Concentration ◽  
Batch Adsorption ◽  
Exchange Method ◽  
Ion Exchange Method ◽  
Adsorption Amount ◽  
Double Hydroxides ◽  
Boron Adsorption

Carboxymethyl cellulose (CMC)-supported layered double hydroxides (CMC-LDHs) were synthesized by ion exchange method. The raw cellulose, unsupported LDH and CMC-LDHs were characterized by XRD, and FTIR. The CMC-LDHs was applied to adsorb boron with batch adsorption in aqueous solution, and the conditions influencing its adsorption amount were investigated. The experimental results showed that the CMC-LDHs had higher adsorption amount than the precursor, and the adsorption amount increased with increasing the contact time, boron concentration, and the pH.

scholarly journals Synthesis of FePcS–PMA–LDH Cointercalation Composite with Enhanced Visible Light Photo-Fenton Catalytic Activity for BPA Degradation at Circumneutral pH

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1951 ◽  
Author(s):  
Fenglian Huang ◽  
Shiqiang Tian ◽  
Yan Qi ◽  
Erping Li ◽  
Liangliang Zhou ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Bisphenol A ◽  
Visible Light ◽  
Layered Double Hydroxides ◽  
Electrochemical Impedance ◽  
Reaction System ◽  
High Catalytic Activity ◽  
Exchange Method ◽  
Double Hydroxides ◽  
Circumneutral Ph

(1) Background: Iron tetrasulfophthalocyanine with a large nonlinear optical coefficient, good stability, and high catalytic activity has aroused the attention of researchers in the field of photo-Fenton reaction. Further improvement of the visible light photo-Fenton catalytic activity under circumneutral pH conditions for their practical application is still of great importance. (2) Methods: In this paper, iron tetrasulfophthalocyanine (FePcS) and phosphomolybdic acid (PMA) cointercalated layered double hydroxides (LDH) were synthesized by the ion-exchange method. All samples were fully characterized by various techniques and the results showed that FePcS and PMA were successfully intercalated in layered double hydroxides and the resulted compound exhibited strong absorption in the visible light region. The cointercalation compound was tested as a heterogeneous catalyst for the visible light photo-Fenton degradation of bisphenol A (BPA) at circumneutral pH. (3) Results: The results showed that the degradation and total organic carbon removal efficiencies of bisphenol A were 100% and 69.2%, respectively. (4) Conclusions: The cyclic voltammetry and electrochemical impedance spectroscopy measurements demonstrated that the main contribution of PMA to the enhanced photo-Fenton activity of FePcS–PMA–LDH comes from the acceleration of electron transfer in the reaction system. Additionally, the possible reaction mechanism in the photo-Fenton system catalyzed by FePcS–PMA–LDH was also proposed.

Synthesis and Adsorption Property of Calixarene-p-sulfonate-intercalated Layered Double Hydroxides

2004 ◽  
Vol 33 (7) ◽  
pp. 790-791 ◽  
Author(s):  
Satoru Sasaki ◽  
Sumio Aisawa ◽  
Hidetoshi Hirahara ◽  
Akira Sasaki ◽  
Eiichi Narita
Keyword(s):  
Layered Double Hydroxides ◽  
Adsorption Property ◽  
Double Hydroxides

Synthesis of Aminotriacetic Acid Intercalated MgAl-Layered Double Hydroxides and its Selective IR Absorption Properties

2014 ◽  
Vol 997 ◽  
pp. 33-37
Author(s):  
Tian Lei Wang ◽  
Xiao Juan Liu ◽  
Mei Tang Liu ◽  
Hong Wen Ma ◽  
Lin Lin
Keyword(s):  
Ir Spectra ◽  
Anion Exchange ◽  
Layered Double Hydroxides ◽  
Carboxyl Groups ◽  
Ir Absorption ◽  
Absorption Properties ◽  
Exchange Method ◽  
Xrd Pattern ◽  
Ft Ir ◽  
Double Hydroxides

A novel aminotriacetic acid (NTA) intercalated MgAl-LDHs have been successfully synthesized by anion exchange method with MgAl-NO3-LDHs as precursor. The XRD pattern implies that NTA anions have replaced NO3- in the interlayer of LDHs. The FT-IR spectra also indicates that NTA anions have intercalated into layers’ space of LDHs, and the carboxyl groups of NTA have been converted into carboxyl anions after intercalation process. When comparing IR spectra of MgAl-NTA-LDHs and MgAl-CO3-LDHs, higher and stronger absorption was observed in the range of 1428-1250 cm-1, especially in the range of 1111-909 cm-1.

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