A Biomass Cationic Adsorbent Prepared From Corn Stalk: Low-Cost Material and High Adsorption Capacity

2017 ◽  
Vol 26 (4) ◽  
pp. 1642-1651 ◽  
Author(s):  
Xue Wen ◽  
Chunjie Yan ◽  
Na Sun ◽  
Tiantian Luo ◽  
Shilai Zhou ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Low Cost ◽  
Corn Stalk ◽  
High Adsorption ◽  
High Adsorption Capacity

Production of high-performance lead(II) ions adsorbents from pea peels waste as a sustainable resource

2020 ◽  
pp. 0734242X2094327
Author(s):  
Viktoriia Novoseltseva ◽  
Halyna Yankovych ◽  
Olena Kovalenko ◽  
Miroslava Václavíková ◽  
Inna Melnyk
Keyword(s):  
Adsorption Capacity ◽  
Energy Efficient ◽  
High Performance ◽  
Low Cost ◽  
Water Remediation ◽  
High Adsorption ◽  
Adsorption Mechanisms ◽  
Recyclable Adsorbent ◽  
High Adsorption Capacity ◽  
Fast Removal

This research deals with a highly efficient, selective, low-cost, and recyclable adsorbent for the fast removal of lead (Pb)(II) ions from aqueous solutions, and an investigation of the related adsorption mechanisms. Three types of materials were prepared from pea peels waste using simple, energy-efficient and environmentally friendly treatment. Obtained adsorbents were characterized by elemental analysis, infrared spectroscopy, scanning electron microscopy, Boehm titration, and the main parameters were determined. The highest adsorption capacity was observed for the biochar prepared by heating of pea peels at 600°C for 30 minutes. The uptake of Pb(II) ions on pea peels-derived samples was examined as a function of pH, contact time, and initial Pb2+ concentration. Obtained results from adsorption experiments of Pb(II) ions on the biochar surface indicate high adsorption capacity, and the possibility of its preconcentration and selective removal in the presence of zinc(II) and cadmium(II) ions. This confirms a potential application of such materials in water remediation.

Preparation of Metal Ions Adsorbent with High Adsorption Capacity by Coupling Glycine to Sepharose 4B

2012 ◽  
Vol 487 ◽  
pp. 11-14
Author(s):  
Zong Hua Qin ◽  
Han Ning Cai ◽  
Ren Qiang Li
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Good Stability ◽  
Carboxyl Group ◽  
High Adsorption ◽  
Coupling Rate ◽  
High Adsorption Capacity ◽  
Sepharose 4B

After Sepharose 4B polymer beads were activated by using epichlorohydrin, glycine was binded with them to prepare an immobilized carboxyl group ion exchange adsorbent. The coupling rate was that 18.3 mg Gly could be fixed by 1 g of wet Sepharose 4B beads. At pH 9, this adsorbent showed power adsorption to metal ions with Ca2+16.49 mg，Mg2+6.92 mg，Fe2+11.06 mg，Fe3+4.98 mg and Mn2+11.84 mg were respectively adsorbed by 20 g of wet Sepharose 4B beads during saturated adsorption. Moreover, this absorbent possessed the properties with good stability, regeneration easily and low cost.

Agar-encapsulated adsorbent based on leaf of platanus sp. to adsorb cadmium ion in water

2014 ◽  
Vol 70 (1) ◽  
pp. 89-94 ◽  
Author(s):  
Eko Siswoyo ◽  
Nozomi Endo ◽  
Yoshihiro Mihara ◽  
Shunitz Tanaka
Keyword(s):  
Citric Acid ◽  
Adsorption Capacity ◽  
Raw Materials ◽  
Low Cost ◽  
Adsorption Model ◽  
High Adsorption ◽  
Cadmium Ion ◽  
Solution Ph ◽  
Isotherm Adsorption ◽  
High Adsorption Capacity

A low cost and environmentally friendly adsorbent was developed based on leaf of platanus sp. to adsorb cadmium ion in water. The adsorbent was modified with citric acid and then also encapsulated in agar for easy separation after the adsorption process. Parameters such as adsorbent dose, stirring time, solution pH and modification of the adsorbent with citric acid were investigated in a batch experiment in order to determine the optimum condition for Cd (II) adsorption. Based on the Langmuir isotherm adsorption model, the adsorption capacity of cadmium ion for raw adsorbent, modified adsorbent with citric acid and encapsulated adsorbent were 3.69, 15.31 and 6.89 mg/g, respectively. The high adsorption capacity after treatment with citric acid may be due to the increase in carboxylic content of the adsorbent surface and also the increase of surface area and pore volume of the adsorbent. With this high adsorption capacity for cadmium ion and an abundance of raw materials, this bio-adsorbent could be considered as a low cost adsorbent in the near future.

scholarly journals Synthesis and Performance Evaluation of Chitosan/zinc Oxide Nanocomposite as a Highly Efficient Adsorbent in the Removal of Reactive Red 198 From Water

2021 ◽  
Author(s):  
Najmeh Amirmahani ◽  
Hakimeh Mahdizadeh ◽  
Neda Seyedi ◽  
Alireza Nasiri ◽  
Ghazal Yazdanpanah
Keyword(s):  
Zinc Oxide ◽  
Adsorption Capacity ◽  
High Efficiency ◽  
Low Cost ◽  
Industrial Effluents ◽  
Textile Wastewater ◽  
Secondary Compounds ◽  
High Adsorption ◽  
Reactive Red 198 ◽  
High Adsorption Capacity

Abstract Disposal of textile industrial effluents causes many environmental problems. The presence of chemical dyes in textile wastewater lead to the primary environmental pollution as well as the production of hazardous secondary compounds that are toxic and carcinogenic. In this study, Chitosan and Chitosan-zinc oxide (ZnO) nanocomposite were prepared and selected as a low-cost adsorbent with high adsorption capacity for removing reactive red 198 (RR 198) dye from contaminated. After preparation, it was characterized using Fourier-transform infrared spectroscopy [FT-IR], X-ray diffraction spectrophotometer [XRD], and scanning electron microscopy [SEM]. The effect of pH, temperature, time, adsorbent amount, and initial dye concentration were investigated in the removal efficiency of reactive red 198 (RR 198) dyes. The results showed that the maximum adsorption capacity (qm) obtained from the Langmuir equation was 172.41 mg/g in adsorbent dose of 0.1 g/L, pH: 4, temperature of 25°C, adsorption time of 40 min. The thermodynamic parameters demonstrated the spontaneous and endothermic nature of the adsorption process. Due to the high efficiency of chitosan/ZnO nanocomposite in removal of RR 198 from water and advantages such as high adsorption capacity, simple synthesis, and easy application, it can be used as an effective method in removal of RR 198 from water.

Mercury Removal from Wastewater by Steamed Hoof Powder

1999 ◽  
Vol 40 (7) ◽  
pp. 109-116 ◽  
Author(s):  
M. H. Ansari ◽  
A. M. Deshkar ◽  
P. S. Kelkar ◽  
D. M. Dharmadhikari ◽  
M. Z. Hasan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Light Metal ◽  
Mercury Removal ◽  
High Adsorption ◽  
Surface Sites ◽  
Ph Values ◽  
High Adsorption Capacity

Steamed Hoof Powder (SHP), size < 53μ, was observed to have high adsorption capacity for Hg(II) with >95% removal from a solution containing 100 mg/L of Hg(II) with only 0.1% (W/V) concentration of SHP. The SHP has good settling properties and gives clear and odour free effluent. Studies indicate that pH values between 2 and 10 have no effect on the adsorption of Hg(II) on SHP. Light metal ions like Na+, K+, Ca2+ and Mg2+ up to concentrations of 500 mg/L and heavy metals like Cu2+, Zn2+, Cd2+, Co2+, Pb2+, Ni2+, Mn2+, Cr3+, Cr6+, Fe2+ and Fe3+ up to concentrations of 100 mg/L do not interfere with the adsorption process. Anions like sulphate, acetate and phosphate up to concentrations of 200 mg/L do not interfere. Chloride interferes in the adsorption process when Hg(II) concentration is above 9.7 mg/L. The adsorption equilibrium was established within two hours. Studies indicate that adsorption occurs on the surface sites of the adsorbent.

scholarly journals Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1540
Author(s):  
Muhammad Ahmad ◽  
Tehseen Nawaz ◽  
Mohammad Mujahid Alam ◽  
Yasir Abbas ◽  
Shafqat Ali ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
High Adsorption ◽  
Clean Environment ◽  
Equilibrium Data ◽  
Langmuir Isotherm Model ◽  
High Adsorption Capacity ◽  
Adsorption Equilibrium Data

The development of excellent drug adsorbents and clarifying the interaction mechanisms between adsorbents and adsorbates are greatly desired for a clean environment. Herein, we report that a reduced graphene oxide modified sheeted polyphosphazene (rGO/poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol)) defined as PZS on rGO was used to remove the tetracycline (TC) drug from an aqueous solution. Compared to PZS microspheres, the adsorption capacity of sheeted PZS@rGO exhibited a high adsorption capacity of 496 mg/g. The adsorption equilibrium data well obeyed the Langmuir isotherm model, and the kinetics isotherm was fitted to the pseudo-second-order model. Thermodynamic analysis showed that the adsorption of TC was an exothermic, spontaneous process. Furthermore, we highlighted the importance of the surface modification of PZS by the introduction of rGO, which tremendously increased the surface area necessary for high adsorption. Along with high surface area, electrostatic attractions, H-bonding, π-π stacking and Lewis acid-base interactions were involved in the high adsorption capacity of PZS@rGO. Furthermore, we also proposed the mechanism of TC adsorption via PZS@rGO.

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