scholarly journals In-situ carbonization of ZIF-67 to fabricate magnetically Co/N-mC with high adsorption capacity toward water remediation

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Zihao Zheng ◽  
Qiye Liu ◽  
Fangxiao Wang
Keyword(s):  
Low Cost ◽  
Water Remediation ◽  
Carbon Composites ◽  
High Adsorption ◽  
Acid Dyes ◽  
Adsorption Ability ◽  
High Adsorption Capacity ◽  
Pyridinic N ◽  
In Situ Carbonization

AbstractCo and N co-modified mesoporous carbon composites (Co/N-mC) have been simply prepared at low cost from the carbonization of ZIF-67 wherein not only providing surface N-modification for promoting the adsorption behavior of acidic dyes, but also constructing a magnetic property for convenient separation. Co/N-mC composite presented the adsorption ability of MO (178 mg g−1) > RhB (141 mg g−1) (T = 25 °C, pH = 7.0, C0 = 20 mg L−1) because of its spacious porous structure (BET: 250.8 m2 g−1; pore size: 3.9 nm) and functional basic character (pyrrolic-N and pyridinic-N). Compared with basic dyes (RhB), mesoporous C doped with N improves the adsorption of acid dyes (MO). In addition, the magnetic properties introduced in the Co/N-mC make it easier to separate after adsorption and regeneration by an external magnetic field.

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.

An “in situ templating” strategy towards mesoporous carbon for high-rate supercapacitor and high-adsorption capacity on dye macromolecules

Carbon ◽  
2020 ◽  
Vol 164 ◽  
pp. 19-27 ◽  
Author(s):  
Kunlin Liu ◽  
Jiuzhou Wang ◽  
Ting Yang ◽  
Hong Wang ◽  
Chengyang Wang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Mesoporous Carbon ◽  
High Rate ◽  
High Adsorption ◽  
High Adsorption Capacity

Interfacial growth of metal–organic framework on carboxyl-functionalized carbon nanotubes for efficient dye adsorption and separation

2020 ◽  
Vol 12 (37) ◽  
pp. 4534-4540
Author(s):  
Xinxin Sang ◽  
Qijun Zha ◽  
Xiangdao Nie ◽  
Dongyin Liu ◽  
Yansong Guo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Metal Organic Framework ◽  
Dye Adsorption ◽  
High Adsorption ◽  
Functionalized Carbon Nanotubes ◽  
Metal Organic ◽  
High Adsorption Capacity ◽  
Interfacial Growth ◽  
Growth Pathway

CNTs@UiO-66-NH2 hybrids prepared through an interfacial in situ growth pathway exhibited a high adsorption capacity 392 mg g−1 towards MO and can effectively separate the MO/MB mixture.

scholarly journals In-situ synthesis of poly(m-phenylenediamine) on chitin bead for Cr(VI) removal

2020 ◽  
Author(s):  
Jinyu Wei ◽  
Huayu Hu ◽  
Yanjuan Zhang ◽  
Zuqiang Huang ◽  
Xingtang Liang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
In Situ Polymerization ◽  
High Adsorption ◽  
Adsorption Temperature ◽  
Monolayer Adsorption ◽  
Ft Ir ◽  
High Adsorption Capacity ◽  
User Friendly ◽  
Adsorption Desorption

Abstract In this work, a user-friendly chitin-based adsorbent (CT-PmPD) was synthesized by in-situ polymerization of m-phenylenediamine on chitin bead, which could effectively remove Cr(VI) from water. The structure and morphology of the CT-PmPD were characterized by FT-IR, XRD, SEM, zeta potential and XPS. Specifically, the effect of adsorbed dosage, pH, contact time, adsorption temperature and coexisting salt on the adsorption of Cr(VI) were studied. Besides, the adsorption mechanism of CT-PmPD toward Cr(VI) were also analyzed. Consequenlty, CT-PmPD exhibited a monolayer adsorption and the Langmuir model fitted a Cr(VI) adsorption capacity reaching 185.4 mg/g at 298 K. The high adsorption capacity was attributed to the abundant amino groups of CT-PmPD, which could be protonated to boost the electrostatic attraction of Cr(VI) oxyanions, thus providing electron to reduce Cr(VI). Additionally, the CT-PmPD revealed a good regeneration and reusability capacity, maintaining most of its adsorption capacity even after five cycles of adsorption-desorption. This high adsorption capacity and excellent regeneration performance highlighted the great potential of CT-PmPD for the removal of Cr(VI).

Mussel-inspired synthesis of polydopamine-functionalized calcium carbonate as reusable adsorbents for heavy metal ions

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47848-47852 ◽  
Author(s):  
Chengyong Li ◽  
Zhong-ji Qian ◽  
Chunxia Zhou ◽  
Weiming Su ◽  
Pengzhi Hong ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Calcium Carbonate ◽  
Chemical Modification ◽  
Heavy Metal Ions ◽  
High Efficiency ◽  
Low Cost ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Adsorption Desorption ◽  
Multiple Adsorption

A new high-efficiency adsorbent (PDA-CaCO3) is fabricated via simple thermal calcination ostracean shells and chemical modification with dopamine. It can be easily regenerated by low-cost reagents, and exhibited high adsorption capacity after multiple adsorption–desorption cycles.

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

Preparation and Characterization of Citric Acid Modified Marigold Dregs Biosorbents

2011 ◽  
Vol 236-238 ◽  
pp. 895-898
Author(s):  
Yi Wang ◽  
Ting Zhang ◽  
Kun Jie Wang ◽  
De Yi Zhang
Keyword(s):  
Citric Acid ◽  
Photoelectron Spectroscopy ◽  
Low Cost ◽  
Infrared Emission ◽  
Hydroxyl Groups ◽  
High Adsorption ◽  
Adsorption Ability ◽  
X Ray ◽  
Adsorption Quantity

The objectives of this study were to convert marigold dregs to a cationic metal ions and dye adsorbent and further to investigate the potential of using the adsorbent for the removal of copper(Ⅱ) and methylene blue (MB) from effluents. The base washed marigold dregs and citric acid (CA) modified marigold dregs (MMD) were prepared and the structure were investigated by fourier transform infrared, emission scanning electron microscope and X-ray photoelectron spectroscopy. The results show that the modification did not significantly change the morphology of the dregs surface structure but the esterificated reaction could increase the carboxyl groups and hydroxyl groups on the surface of the adsorbent. The adsorption ability are also evaluated by MB and copper(Ⅱ) and the results show the MMD is an excellent adsorbent. Due to the high adsorption quantity, it may be used as a low cost alternate adsorbent for the elimination of metal and dye ions form effluents.

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.

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