TiO2-pillared magadiite and its arsenic adsorption capacity

2019 ◽  
Vol 26 (1) ◽  
pp. 311-318
Author(s):  
Sarah Louise S. Atulba ◽  
Jeong Hun Jang ◽  
Man Park
Keyword(s):  
Adsorption Capacity ◽  
Arsenic Adsorption

scholarly journals THE STUDY OF ADSORPTION CAPACITY ON BONE CHAR IN WASTEWATER TREATMENT CONTAINED ARSENIC ION

2020 ◽  
Vol 39 (03) ◽  
Author(s):  
VO THANH CONG ◽  
DO QUY DIEM ◽  
NGUYEN VAN SON
Keyword(s):  
Wastewater Treatment ◽  
Optimal Condition ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Bone Char ◽  
Positive Research ◽  
Arsenic Adsorption ◽  
Experimental Performance ◽  
Adsorption Time ◽  
Initial Concentration

Wastewater treatment is one of the urgent and important issues in environmental protection. Nowadays, many methods to treat wastewater in industry were found to which adsorption applied as an effective method. Among possible adsorbents, bone char appeared to be of important application especially for heavy metals. In this study, we are applied char bone char sample as an adsorbent at optimal condition on previous investigation to adsorb arsenic ion (type of As5+ ion) contained in wastewater. The detail in experimental performance, the initial concentration, capacity adsorption, and adsorption time at optimal condition of arsenic ion solution were examined. The results of arsenic adsorption process were found that the optimization of initial concentration to be As5 sample with adsorption capacity of 0.124 mg arsenic ion/g bone char at time of 60 minute. In addition, the optimal adsorption time on As5 sample was also determined as 90 minutes with capacity adsorption of 0.02 mg arsenic ion/ g bone char. The positive research results of the adsorption on bone char have pointed out a possible application of bone char as an adsorbent in future.

scholarly journals Role of Zn And Polyaniline In Magnetic Nanocomposites And Enhanced Arsenic Adsorption Capacity In Wastewater

2021 ◽  
Author(s):  
Tran Minh Thi ◽  
Nguyen Mau Lam ◽  
Do Khanh Tung ◽  
Nguyen Manh Nghia ◽  
Duong Quoc Van ◽  
...  
Keyword(s):  
Grain Size ◽  
Adsorption Capacity ◽  
Relative Pressure ◽  
Arsenic Adsorption ◽  
Saturation Magnetic Moment ◽  
Structure Of Nanoparticles ◽  
Bet Method ◽  
Xrd Patterns ◽  
20 Nm

Abstract Polyaniline/Fe0.90Zn0.10Fe2O4 (PANI/Zn0.10Fe2.90O4) nanocomposites were synthesized by a chemical method and an onsite polymerization method. XRD patterns showed that the Zn0.10Fe2.90O4 grain size about 12 nm, while TEM image showed grain size from 10 to 20 nm. The results of Raman spectra and DTA analyses showed that PANI participated in part of the PANI/Zn0.10Fe2.90O4 nanocomposite samples. The grain size of PANI/Zn0.10Fe2.90O4 samples measured by SEM was about 35–50 nm. These results demonstrated the shell–core structures of the nanocomposite material. The magnetization measurements at room temperature showed that in 1250 Oe magnetic field, the saturation magnetic moment of PANI/Zn0.10Fe2.90O4 samples decreased from 71.2 to 42.3 emu/g when the PANI concentration increased from 0 % to 15 %. The surface area and porous structure of nanoparticles were investigated by the BET method at 77 K and a relative pressure P/P0 of about 1. The arsenic adsorption capacity of the PANI/Zn0.10Fe2.90O4 sample with the PANI concentration of 5 % was better than that of Fe3O4 and Zn0.10Fe2.90O4 in a solution of pH 7. In the solution with pH P14, the arsenic adsorption of magnetic nanoparticles was insignificant. Due to substitution of Fe ions by Zn transition metal and coating polyaniline, these materials could be reabsorbed and reused.

Influence of the iron content on the arsenic adsorption capacity of Fe/GAC adsorbents

2014 ◽  
Vol 2 (2) ◽  
pp. 927-934 ◽  
Author(s):  
Mirna E. Sigrist ◽  
Lucila Brusa ◽  
Horacio R. Beldomenico ◽  
Liza Dosso ◽  
Oksana M. Tsendra ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Iron Content ◽  
Arsenic Adsorption

scholarly journals Dynamic desorption of arsenic from polymer-supported hydrated iron(III) oxide in a wastewater treatment plant

2017 ◽  
Vol 76 (9) ◽  
pp. 2380-2388 ◽  
Author(s):  
Jian-Long Hu ◽  
Xiao-Song Yang ◽  
Ting Liu ◽  
Li-Nan Shao ◽  
Wang Zhang
Keyword(s):  
Wastewater Treatment ◽  
Adsorption Capacity ◽  
Wastewater Treatment Plant ◽  
Arsenic Removal ◽  
Treatment Plant ◽  
Arsenic Adsorption ◽  
Wastewater Treatment Process ◽  
Long Time ◽  
Naoh Solution ◽  
Polymer Supported

Abstract Polymer-supported hydrated iron(III) oxide (PHIO) was successfully applied as adsorbent for arsenic removal in a wastewater treatment plant in Nandan, China. The practical PHIO adsorbent samples (PHIO-P) were collected from the adsorption column of the wastewater treatment plant, and desorption experiments of the adsorbent were carried out. Our results showed that the formation of precipitates on the surface of PHIO-P might block the porous channel of the adsorbent and decrease its arsenic adsorption capacity. In the dynamic arsenic desorption experiment, the arsenic desorption equilibrium was achieved more quickly at decreasing desorption velocity, and higher arsenic desorption efficiency was obtained at increasing NaOH concentration in regenerant. It was found that the PHIO-P adsorbent could be well regenerated at 1.0 M NaOH solution and desorption velocity of 5 BV h−1. Comparing with the raw adsorbent, the maximum arsenic adsorption capacity of PHIO-P decreased by 41.1% after practical running for 26 months. Additionally, the frequently used waste PHIO adsorbent could be treated as non-hazardous material in the arsenic-containing wastewater treatment process after long-time use.

ARSENIC ADSORPTION FROM WATER USING GRAPHENE-BASED MATERIALS AS ADSORBENTS: A CRITICAL REVIEW

2016 ◽  
Vol 24 (01) ◽  
pp. 1730001 ◽  
Author(s):  
XUETONG YANG ◽  
LING XIA ◽  
SHAOXIAN SONG
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Process ◽  
Arsenic Removal ◽  
Surface Complexation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Large Specific Surface Area ◽  
Arsenic Adsorption ◽  
Adsorption Mechanisms ◽  
Adsorption Performance

Adsorption is widely applied to remove arsenic from water. This paper reviewed and compared the recent progresses on the arsenic removal by adsorption using two-dimensional and three-dimensional graphene-based materials as adsorbents. Functional graphene sheet achieved the largest As(III) adsorption capacity of 138.79[Formula: see text]mg/g, while Mg-Al LDH/GO2 showed the largest As(V) adsorption capacity of 183.11[Formula: see text]mg/g. Parameters including pH, temperature, co-existing ions and loaded metal or metal oxide affected the adsorption process. The adsorption mechanisms of graphene-based materials for As(III) and As(V) could be explained by surface complexation and the electrostatic attraction, respectively. Future works are suggested to focus on regenerating of two-dimensional graphene-based adsorbents and developing the three-dimensional with large specific surface area and better adsorption performance.

scholarly journals Study on the modification of Phu Yen diatomite by mixed Fe-Mn oxide and the use of the modified material as an arsenic removal adsorbent in water environment

2021 ◽  
Vol 10 (1) ◽  
pp. 13-20
Author(s):  
Thien Tran Vinh ◽  
Tu Nguyen Thi Thanh ◽  
Son Bui Hai Dang
Keyword(s):  
Adsorption Capacity ◽  
Arsenic Removal ◽  
Water Environment ◽  
Surface Characteristics ◽  
Reduction Reaction ◽  
Arsenic Adsorption ◽  
Solution Ph ◽  
Mn Oxide ◽  
Oxidation Reduction ◽  
Modified Diatomite

The paper presents the modification of Phu Yen diatomite by oxidation-reduction reaction between Fe (II) and KMnO4 salts in solution pH = 6 on the diatomite surface. Characteristics of modified materials and the influence of research factors on these characteristics were investigated using techniques XRD, EDX, XPS, SEM, TEM, BET. Arsenic adsorption capacity of modified materials, the influence of environmental factors on the adsorption capacity were also investigated and evaluated. The results showed that mixed oxide-modified diatomite has higher arsenic adsorption capacity than natural diatomite and modified diatomite by individual oxides.

scholarly journals Fe-FeS2 adsorbent prepared with iron powder and pyrite by facile ball milling and its application for arsenic removal

2017 ◽  
Vol 76 (1) ◽  
pp. 192-200 ◽  
Author(s):  
Xiaobo Min ◽  
Yangwenjun Li ◽  
Yong Ke ◽  
Meiqing Shi ◽  
Liyuan Chai ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Ball Milling ◽  
Photoelectron Spectroscopy ◽  
Arsenic Removal ◽  
Molar Ratio ◽  
Arsenic Adsorption ◽  
Arsenic Uptake ◽  
X Ray ◽  
Before And After ◽  
High Arsenic

Arsenic is one of the major pollutants and a worldwide concern because of its toxicity and chronic effects on human health. An adsorbent of Fe-FeS2 mixture for effective arsenic removal was successfully prepared by mechanical ball milling. The products before and after arsenic adsorption were characterized with scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The adsorbent shows high arsenic removal efficiency when molar ratio of iron to pyrite is 5:5. The experimental data of As(III) adsorption are fitted well with the Langmuir isotherm model with a maximal adsorption capacity of 101.123 mg/g. And As(V) data were described perfectly by the Freundlich model with a maximal adsorption capacity of 58.341 L/mg. As(III) is partial oxidized to As(V) during the adsorption process. High arsenic uptake capability and cost-effectiveness of waste make it potentially attractive for arsenic removal.

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