Phosphate adsorption on novel hydrogel beads with interpenetrating network (IPN) structure in aqueous solutions: kinetics, isotherms and regeneration

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23233-23241 ◽  
Author(s):  
Jun Wan ◽  
Tao Tao ◽  
Yong Zhang ◽  
Xiangmin Liang ◽  
Aijiao Zhou ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Phosphorus Removal ◽  
Low Cost ◽  
Phosphate Adsorption ◽  
Interpenetrating Network ◽  
P Adsorption ◽  
Hydrogel Beads

Adsorption has attracted much attention for its effectiveness, low cost and the possibility of regeneration among many phosphorus removal methods.

scholarly journals Adsorptive Removal of Phosphate from Aqueous Solutions Using Low-Cost Volcanic Rocks: Kinetics and Equilibrium Approaches

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1312
Author(s):  
Dereje Tadesse Mekonnen ◽  
Esayas Alemayehu ◽  
Bernd Lennartz
Keyword(s):  
Aqueous Solutions ◽  
Low Income ◽  
Low Cost ◽  
Volcanic Rocks ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Adsorptive Capacity ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorptive Removal

The contamination of surface and groundwater with phosphate originating from industrial and household wastewater remains a serious environmental issue in low-income countries. Herein, phosphate removal from aqueous solutions was studied using low-cost volcanic rocks such as pumice (VPum) and scoria (VSco), obtained from the Ethiopian Great Rift Valley. Batch adsorption experiments were conducted using phosphate solutions with concentrations of 0.5 to 25 mg·L−1 to examine the adsorption kinetic as well as equilibrium conditions. The experimental adsorption data were tested by employing various equilibrium adsorption models, and the Freundlich and Dubinin-Radushkevich (D-R) isotherms best depicted the observations. The maximum phosphate adsorption capacities of VPum and VSco were calculated and found to be 294 mg·kg−1 and 169 mg·kg−1, respectively. A pseudo-second-order kinetic model best described the experimental data with a coefficient of correlation of R2 > 0.99 for both VPum and VSco; however, VPum showed a slightly better selectivity for phosphate removal than VSco. The presence of competitive anions markedly reduced the removal efficiency of phosphate from the aqueous solution. The adsorptive removal of phosphate was affected by competitive anions in the order: HCO3− >F− > SO4−2 > NO3− > Cl− for VPum and HCO3− > F− > Cl− > SO4−2 > NO3− for VSco. The results indicate that the readily available volcanic rocks have a good adsorptive capacity for phosphate and shall be considered in future studies as test materials for phosphate removal from water in technical-scale experiments.

scholarly journals Organic residue, limestone, gypsum, and phosphorus adsorption by lowland soils

2002 ◽  
Vol 59 (2) ◽  
pp. 349-355 ◽  
Author(s):  
Alex Teixeira Andrade ◽  
Luiz Arnaldo Fernandes ◽  
Valdemar Faquin
Keyword(s):  
Low Cost ◽  
Phosphate Adsorption ◽  
Organic Residue ◽  
Organic Residues ◽  
Phosphorus Adsorption ◽  
P Adsorption ◽  
Randomized Design ◽  
Exchangeable Al ◽  
Completely Randomized Design ◽  
Gypsum Application

Organic residue application is a low cost alternative to reduce the use of inorganic fertilizers and correctives. In order to study the effect of organic residues, limestone and gypsum application on phosphorus adsorption by lowland soils, four experiments were carried out. A Mesic Organosol (OY), a Melanic Gleysol (MG), a Haplic Gleysol (GX), and a Fluvic Neosol (RU) were used in a completely randomized design and factorial scheme (3 x 2), with five replicates: three soil amendment practices (limestone, gypsum and no corrective) and two levels of organic residue (with and without corral manure). Soil samples were incubated for 60 days, with and without organic residue incorporation. After this period, we applied the corrective and incubated the soil for 30 days, then P and basic fertilization (macro and micronutrients) were applied and the soil was incubated for additional 60 days. Equilibrium phosphorus, maximum phosphate adsorption capacity, pH, exchangeable Al and phosphorus-buffering index were measured. Organic residue and limestone application increased soil pH and reduced exchangeable Al, decreasing P adsorption. Gypsum application did not increase the pH but reduced exchangeable Al and P adsorption.

Phosphate adsorption on metal oxides and metal hydroxides: A comparative review

2016 ◽  
Vol 24 (3) ◽  
pp. 319-332 ◽  
Author(s):  
Mengxue Li ◽  
Jianyong Liu ◽  
Yunfeng Xu ◽  
Guangren Qian
Keyword(s):  
Metal Oxides ◽  
Phosphorus Removal ◽  
Low Cost ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Alkaline Solutions ◽  
Synthesis Methods ◽  
Mechanism Study ◽  
Metal Hydroxides ◽  
Comparative Review

Phosphorus removal from wastewater is important for eutrophication control of water bodies. Metal oxides and metal hydroxides have always been developed and investigated for phosphorus removal, because of their abundance, low cost, environmental friendliness, and chemically stability. This paper presents a comparative review of the literature on the preparation methods, adsorption behaviors, adsorption mechanisms, and the regeneration of metal (hydr)oxides (e.g., Fe, Zn, Al, etc.) with regard to phosphate removal. The contrasting results showed that metal hydroxides could offer an effective and economic alternative to metal oxides, because of their cost–benefit synthesis methods, higher adsorption capacities, and shorter adsorption equilibrium times. However, the specific surface area of metal oxides is larger than that of metal hydroxides because of the calcination process. Metal oxides with a higher pH at the zero point of charge have wider optimal adsorption pH ranges than metal hydroxides because of their surface precipitation in alkaline solutions. The regeneration of metal oxides using acids, bases, and salts and that of metal hydroxides using acids and bases has been critically examined. Further research on uniform metal (hydr)oxides with small particle size, high stabilities, low cost, and that are easily regenerated with promising desorbents are proposed. In addition, quantitative mechanism study and application in continuous-mode column trials are also suggested.

scholarly journals Thermally treated aluminium waste-filings, a low cost and efficient adsorbent for phosphorus removal from water

2018 ◽  
Vol 20 (3) ◽  
pp. 488-496 ◽  
Keyword(s):  
Phosphorus Removal ◽  
Manufacturing Industry ◽  
Kinetic Modelling ◽  
Low Cost ◽  
P Adsorption ◽  
Langmuir Isotherm Model ◽  
Efficient Adsorbent ◽  
Monolayer Coverage ◽  
P Removal ◽  
Thermally Treated

<p>A facile strategy toward modification of aluminium filings (AF), a waste material from aluminium manufacturing industry, into a highly efficient adsorbent was examined. AF was simply treated with thermal modification to form a cheap adsorbent for Phosphorus (P) removal from aqueous solutions. The results showed that increasing the calcination temperature from 500 to 900 ˚C improved the P removal. P adsorption occurred quite fast and 70% of P removal observed in 15 minutes. Adsorption efficiency was increased by increasing pH, decreasing P initial concentration as well. The presence of coexisting anions, except HCO3-, showed a negligible effect on P adsorption by AF. Thermodynamic studies revealed that P adsorption onto AF was endothermic in nature. Kinetic modelling demonstrated that the adsorption rate was controlled by the chemisorption. The process also fitted well with the Langmuir isotherm model, indicating that the process proceeds via monolayer coverage with 49.97 mg g-1 maximum monolayer capacity. Overall, in addition to beneficial environmental and economic aspects, the results demonstrated excellent adsorption characteristics which make thermally treated AF a promising adsorbent material for phosphorus removal from polluted streams.</p>

Phosphate adsorption from aqueous solutions by disused adsorbents: Chitosan hydrogel beads after the removal of copper(II)

2011 ◽  
Vol 166 (3) ◽  
pp. 970-977 ◽  
Author(s):  
Jie Dai ◽  
Hu Yang ◽  
Han Yan ◽  
Yonggang Shangguan ◽  
Qiang Zheng ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Phosphate Adsorption ◽  
Chitosan Hydrogel ◽  
Hydrogel Beads

Synthesis and adsorption application of amine shield-introduced-released porous chitosan hydrogel beads for removal of acid orange 7 from aqueous solutions

RSC Advances ◽  
2015 ◽  
Vol 5 (77) ◽  
pp. 62778-62787 ◽  
Author(s):  
Tingting Li ◽  
Yunguo Liu ◽  
Shufan Wang ◽  
Guangming Zeng ◽  
Bohong Zheng ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
Acid Orange 7 ◽  
Chitosan Hydrogel ◽  
Acid Orange ◽  
Hydrogel Beads ◽  
Porous Chitosan

An effective and low-cost adsorbent named amine shield-introduced-released porous chitosan hydrogel beads (APCB) was synthesized and used for the removal of acid orange 7 from aqueous solutions.

Raw and treated marble wastes reuse as low cost materials for phosphorus removal from aqueous solutions: Efficiencies and mechanisms

2015 ◽  
Vol 18 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Khouloud Haddad ◽  
Salah Jellali ◽  
Safa Jaouadi ◽  
Mahmoud Benltifa ◽  
Ammar Mlayah ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Phosphorus Removal ◽  
Low Cost

Powdered marble wastes reuse as a low-cost material for phosphorus removal from aqueous solutions under dynamic conditions

2013 ◽  
Vol 52 (7-9) ◽  
pp. 1705-1715 ◽  
Author(s):  
Safa Jaouadi ◽  
Mohamed Ali Wahab ◽  
Makram Anane ◽  
Latifa Bousselmi ◽  
Salah Jellali
Keyword(s):  
Aqueous Solutions ◽  
Phosphorus Removal ◽  
Low Cost ◽  
Dynamic Conditions

scholarly journals Sanky (Corryocactus brevistylus) Peel as Low-Cost Adsorbent for Removal of Phosphate from Aqueous Solutions

2021 ◽  
Vol 13 (16) ◽  
pp. 8994
Author(s):  
Eliana Contreras-López ◽  
Victor Miyashiro Kiyan ◽  
Jaime Porras Cerrón ◽  
Ana María Muñoz ◽  
Fernando Ramos-Escudero ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Low Cost ◽  
Good Alternative ◽  
Phosphate Removal ◽  
Phosphate Adsorption ◽  
Batch Adsorption ◽  
Equilibrium Data ◽  
Adsorption Rates

This study aimed to evaluate the adsorption capacity of an adsorbent obtained using sanky peel for the removal of phosphate from aqueous solutions. The study was conducted in two stages: (1) adsorbent preparation considering yield, phosphate removal, adsorption capacity, and textural characteristics; (2) an assessment of the effectiveness of using sanky peel as an adsorbent for removing phosphates from aqueous solutions. Batch adsorption was studied in aqueous solutions containing phosphate and calcium ions with the selected adsorbent. Adsorption kinetics and equilibrium isotherms were studied using mathematical models. The adsorption kinetics followed the pseudo-second-order, Elovich, and Weber–Morris models, thus demonstrating that adsorption rates were not controlled by multiple processes. Adsorption equilibrium data fitted best with the Dubinin–Radushkevich model. Finally, a Fourier transform infrared spectroscopy analysis revealed the presence of brushite spectra bands after adsorption. The results of this study can help better understand the use of sanky peel as an adsorbent and good alternative for aqueous phosphate adsorption.

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