scholarly journals Preparation, Characterization, and Application of Novel Ferric Oxide-Amine Material for Removal of Nitrate and Phosphate in Water

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Trung Thanh Nguyen ◽  
Tri Thich Le ◽  
Phuoc Toan Phan ◽  
Nhat Huy Nguyen
Keyword(s):  
Ferric Oxide ◽  
Exchange Resin ◽  
Xrd Analysis ◽  
Ion Exchange Resin ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Practical Applications ◽  
Adsorption Capacities ◽  
Adsorption Temperature ◽  
Potential Use

Ferric oxide-amine material was synthesized and applied as a novel adsorbent for nitrate and phosphate removal from aqueous solution. The properties of ferric oxide-amine were examined using TGA, FTIR, BET, SEM, EDX, SEM-mapping, and XRD analysis. The results showed that the adsorption using ferric oxide-amine material reached equilibrium after 30 and 60 min for nitrate and phosphate, respectively. The highest nitrate and phosphate adsorption capacities were 131.4 mg nitrate/g at pH 5-6 and 42.1 mg phosphate/g at pH 6. The effects of adsorbent dosage, initial concentrations of nitrate and phosphate, and adsorption temperature were also investigated. Among the three adsorbents of ferric oxide-amine, ferric oxide, and Akualite A420 ion exchange resin, ferric oxide-amine material had the highest adsorption capacity for nitrate and phosphate removal. These results suggest a great potential use of ferric oxide-amine material for water treatment in practical applications.

scholarly journals Phosphorus Release and Adsorption Properties of Polyurethane–Biochar Crosslinked Material as a Filter Additive in Bioretention Systems

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 283
Author(s):  
Yike Meng ◽  
Yuan Wang ◽  
Chuanyue Wang
Keyword(s):  
Removal Rate ◽  
Phosphorus Release ◽  
Phosphate Adsorption ◽  
Stormwater Treatment ◽  
Isothermal Adsorption ◽  
Phosphorus Pollution ◽  
Adsorption Capacities ◽  
Saturated Water Content ◽  
Phosphate Treatment ◽  
Potential Use

Bioretention systems are frequently employed in stormwater treatment to reduce phosphorus pollution and prevent eutrophication. To enhance their efficiency, filter additives are required but the currently used traditional materials cannot meet the primary requirements of excellent hydraulic properties as well as outstanding release and adsorption capacities at the same time. In this research, a polyurethane-biochar crosslinked material was produced by mixing the hardwood biochar (HB) with polyurethane to improve the performance of traditional filter additives. Through basic parameter tests, the saturated water content of polyurethane-biochar crosslinked material (PCB) was doubled and the permeability coefficient of PCB increased by two orders of magnitude. Due to the polyurethane, the leaching speed of phosphorus slowed down in the batching experiments and fewer metal cations leached. Moreover, PCB could adsorb 93–206 mg/kg PO43− at a typical PO43− concentration in stormwater runoff, 1.32–1.58 times more than HB, during isothermal adsorption experiments. In the simulating column experiments, weaker hydropower reduced the PO43− leaching quantities of PCB and had a stable removal rate of 93.84% in phosphate treatment. This study demonstrates the potential use of PCB as a filter additive in a bioretention system to achieve hydraulic goals and improve phosphate adsorption capacities.

scholarly journals CO2 Adsorption and Desorption by Waste Ion-Exchange Resin–Based Activated Carbon on Fixed Bed

2021 ◽  
Vol 9 ◽  
Author(s):  
Mengqi Wei ◽  
Qiuyue Zhao
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Adsorption Capacity ◽  
Gas Flow ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Adsorption Rate ◽  
Adsorption And Desorption ◽  
Product Gas ◽  
Adsorption Temperature

The waste ion-exchange resin–based activated carbon (WIRAC) was utilized for CO2 adsorption. The effect of adsorption temperature, gas flow, CO2 concentration, and adsorbent filling content on CO2 adsorption properties of WIRAC and the effect of desorption temperature and sweep gas flow on CO2 desorption performances of WIRAC were researched. In the adsorption process, with the increase of adsorption temperature, the CO2 adsorption capacity and adsorption rate decrease; as the gas flow increases, the CO2 adsorption capacity decreases, but the adsorption rate increases; with the increase of CO2 concentration and adsorbent filling content, the CO2 adsorption capacity and adsorption rate both increase. In the desorption process, the higher the desorption temperature and the smaller the sweep gas flow, the higher the CO2 purity of product gas and the longer the desorption time. In order to make sure the adsorbent be used efficiently and the higher CO2 concentration of product gas, the adsorption and desorption conditions selected should be a suitable choice.

One-Pot Synthesis of Mesoporous MCM-41 with Different Functionalization Levels and their Adsorption Abilities to Phosphate

2012 ◽  
Vol 476-478 ◽  
pp. 1969-1973 ◽  
Author(s):  
Wei Ya Huang ◽  
Jun Yang ◽  
Yuan Ming Zhang
Keyword(s):  
Removal Rate ◽  
Langmuir Model ◽  
Phosphate Concentration ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Experiment Data ◽  
Sorption Equilibrium ◽  
One Pot ◽  
Adsorption Capacities ◽  
Mcm 41

Ethylenediamine (EDA) functionalized mesoporous MCM-41 particles displaying various functionalization levels have been prepared by one-pot method. The prepared samples were treated with Fe(III) to form cationic complexes inside MCM-41 pores (MCM-41-NN-Fe-x%, x=10, 20 and 30) for trapping phosphate from water. The prepared adsorbents were characterized by XRD, BET, TGA and elemental analysis, and their phosphate adsorption performances were studied. The results showed that the phosphate removal rate of all the prepared adsorbents were higher than 95% at the initial phosphate concentration of 2 ppm. Additionally, the Langmuir model was used to simulate the sorption equilibrium, and the results indicated that the experiment data agreed well with the Langmuir model. The maximum adsorption capacities calculated from the Langmuir model increased with the increase of diamino loadings in adsorbents, and the maximum adsorption capacities of MCM-41-NN-Fe-30% was 52.5 mg/g.

scholarly journals Preparation of GO/PAM Continuous Adsorption Medium and its Dynamic Adsorption Properties for Methylene Blue

2020 ◽  
Vol 213 ◽  
pp. 01031
Author(s):  
Dagang Li ◽  
Zhiwen Wang
Keyword(s):  
Methylene Blue ◽  
Exchange Resin ◽  
Amorphous Region ◽  
Ion Exchange Resin ◽  
Dynamic Adsorption ◽  
Dyeing Wastewater ◽  
Continuous Adsorption ◽  
Printing And Dyeing Wastewater ◽  
Adsorption Capacities ◽  
One Step

A continuous and structured porous adsorbent named GO/PAM was synthesised by one-step copolymerization of graphene oxide (GO) and acrylamide (AM) in amorphous region initiated by redox agent consisting of hydrogen peroxide (H2O2) and ascorbic acid (VC) at -20°C. The dynamic adsorption characteristics of methylene blue (MB) in GO/PAM structured adsorption medium were investigated. With the introduction of GO which rich in —OH and —COOH groups, the adsorption capacities were 178.65 mg/g~201.58 mg/g. Structured continuous adsorption medium was prepared by one-step polymerization of crystallization, in order to replace traditional bulk resin and ion exchange resin in the treatment of printing and dyeing wastewater.

scholarly journals A comparative study on phosphate removal from water using Phragmites australis biochars loaded with different metal oxides

2021 ◽  
Vol 8 (6) ◽  
pp. 201789
Author(s):  
Pengfei Wang ◽  
Mengmeng Zhi ◽  
Guannan Cui ◽  
Zhaosheng Chu ◽  
Shuhang Wang
Keyword(s):  
Metal Oxide ◽  
Phragmites Australis ◽  
Phosphate Removal ◽  
Adsorption Rate ◽  
Polluted Water ◽  
Phosphate Adsorption ◽  
Adsorption Capacities ◽  
Low Concentrations ◽  
Intra Particle Diffusion ◽  
Kinetics And Isotherms

Metal oxide-loaded biochars are a promising material to remove phosphate from polluted water to ultra-low concentrations. To facilitate preparing the metal oxide-loaded biochar with the best phosphate adsorption performance, five biochars loaded with Al, Ca, Fe, La and Mg oxides, respectively (Al-BC, Ca-BC, Fe-BC, La-BC and Mg-BC) were produced using Phragmites australis pretreated with 0.1 mol AlCl 3 , CaCl 2 , FeCl 3 , LaCl 3 and MgCl 2 , respectively, characterized, and phosphate adsorption kinetics and isotherms of the biochars were determined. The maximum phosphate adsorption capacities ( Q m ) of the biochars ranked as Al-BC (219.87 mg g −1 ) > Mg-BC (112.45 mg g −1 ) > Ca-BC (81.46 mg g −1 ) > Fe-BC (46.61 mg g −1 ) > La-BC (38.93 mg g −1 ). The time to reach the adsorption equilibrium ranked as La-BC (1 h) < Ca-BC (12 h) < Mg-BC (24 h) = Fe-BC (24 h) <Al-BC (greater than 72 h). Q m of Ca-BC, Fe-BC, La-BC and Mg-BC depend on the molar content of metals in the biochars. The small phosphate adsorption rate of Al-BC is due to the slow intra-particle diffusion of phosphate attributed to the undeveloped porosity and dispersed distribution of AlOOH crystals on the Al-BC surface. Mg-BC is suggested for phosphate removal from water considering adsorption rate and capacity. Al-BC is applicable when a long contact time is allowed, e.g. as a capping material to immobilize phosphate in lake sediments.

scholarly journals POTENCIALIDADE DE USO DA RESINA AMBERLITE IR 120 NO TRATAMENTO DE RESÍDUOS QUÍMICOS CONTENDO ESPÉCIES IÔNICAS COM CR2O72-, FE3+ E MNO4-

2014 ◽  
Vol 39 (1) ◽  
pp. 12
Author(s):  
Fernanda Da Silva Nogueira ◽  
Aparecida Maria Simões Mimura ◽  
Júlio César José Da Silva ◽  
Rafael Arromba de Sousa
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Ion Exchange Resins ◽  
Chemistry Department ◽  
Experimental Conditions ◽  
Cationic Resin ◽  
Exchange Resins ◽  
Potential Use ◽  
Acid Waste

Ion exchange resins have been widely used as an option for wastewater treatments and are effective in reducing the concentration of residual metals. In this context, the aim of this study was to evaluate the potential use of an ion exchange resin for the treatment of an acid waste regularly produced at the Chemistry Department in the Federal University of Juiz de Fora. Employing optimized experimental conditions the studied method allowed to remove, significantly the Fe3+, Cr2O72- and MnO4- content, using only the cationic resin, AMBERLITE IR 120®. In addition, desorption of these species was also studied, in which the metals content could be concentrated into a volume 70% smaller than the ordinary waste volume. Besides, after that desorption the resin can be reused and the method showed to be adequate for routine uses.

scholarly journals CHARACTERIZATION AND ADSORPTION CAPACITY OF AMINE-SIO2 MATERIAL FOR NITRATE AND PHOSPHATE REMOVAL

2019 ◽  
Vol 57 (4) ◽  
pp. 492
Author(s):  
Phan Phuoc Toan ◽  
Nguyen Trung Thanh ◽  
Nguyen Nhat Huy ◽  
Le Ngoc Hang ◽  
Le Tri Thich
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Stable Performance ◽  
Regeneration Times ◽  
Sem Analyses

Amine-SiO2 material was synthesized and applied as a novel adsorbent for nitrate and phosphate removal from aqueous solution. The characterization of Amine-SiO2 were done by using TGA, FTIR, BET, and SEM analyses. Results showed that Amine-SiO2 had higher nitrate and phosphate adsorption capacity of 1.14 and 4.16 times, respectively, than commercial anion exchange resin (Akualite A420). In addition, Amine-SiO2 also had good durability with stable performance after at least 10 regeneration times, indicating that this material is very promising for commercialization in the future as an adsorbent for water treatment.

Practical applications of ion exchange resins in agricultural and environmental soil research

2002 ◽  
Vol 82 (1) ◽  
pp. 9-21 ◽  
Author(s):  
P. Qian ◽  
J. J. Schoenau
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Ion Exchange Resins ◽  
Journal Articles ◽  
Practical Applications ◽  
Fertilizer Recommendations ◽  
Recent Developments ◽  
Exchange Resins ◽  
And Diffusion

The use of synthetic ion-exchange resins to examine ion bioavailability in soil and sediment systems has attracted much attention over the years. The first report in this regard was made 7-8 yr after resins were developed in the 1930s. So far, nearly 400 journal articles have been published related to use of resins in soil and environmental studies. The experience gained has led to more widespread applications in research as well as practical use in soil fertility assessment and fertilizer recommendations. Two commercial products developed in North America have directly resulted from years of research efforts. Recent developments in resin technology and availability warrant an updated review of the literature to aid in better understanding and utilizion of this technique. In this paper we provide an overview of historic and current developments in the use of ion exchange techniques in soil research. We also provide specific examples of successful use of batch and diffusion-sensitive ion exchange techniques in research and commercial use to assess ion availability. Finally, we address certain frequently asked questions about how the ion exchange resin technique is applied and how results are interpreted, including their advantages and limitations. Key Words: Ion exchange resin, agriculture, environment, soil research

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