Fabrication of nitrogen-doped porous carbons derived from ammoniated copolymer precursor: Record-high adsorption capacity for indole

2019 ◽  
Vol 374 ◽  
pp. 1005-1012 ◽  
Author(s):  
Ding-Ming Xue ◽  
Shi-Chao Qi ◽  
Qiong-Zhen Zeng ◽  
Ren-Jie Lu ◽  
Jiang-Hai Long ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Porous Carbons ◽  
High Adsorption ◽  
Nitrogen Doped ◽  
High Adsorption Capacity

scholarly journals Ginger Straw Waste-Derived Porous Carbons as Effective Adsorbents toward Methylene Blue

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 469 ◽  
Author(s):  
Wenlin Zhang ◽  
Huihe Li ◽  
Jianmin Tang ◽  
Hongjia Lu ◽  
Yiqing Liu
Keyword(s):  
Methylene Blue ◽  
Porous Materials ◽  
Adsorption Capacity ◽  
Adsorption Rate ◽  
Dye Wastewater ◽  
Porous Carbons ◽  
High Adsorption ◽  
New Approach ◽  
High Adsorption Capacity

In this work, ginger straw waste-derived porous carbons, with high adsorption capacity, high adsorption rate, and good reusability for removing the toxic dye of methylene blue from wastewater, were prepared by a facile method under oxygen-limiting conditions. This study opens a new approach for the utilization of ginger straw waste, and the porous materials can be employed as great potential adsorbents for treating dye wastewater.

scholarly journals Sonicated Zeolitic Imidazolate Frameork-8 derived Nitrogen-doped hierarchical nanoporous carbon for efficient capture and reversible storage of radioiodine

2021 ◽  
Author(s):  
Elvis Miensah ◽  
Jiuyu Chen ◽  
Aotian Gu ◽  
Peng Wang ◽  
Ying Liu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Nanoporous Carbon ◽  
Industrial Applications ◽  
Large Surface Area ◽  
Hydroxyl Groups ◽  
High Adsorption ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
High Adsorption Capacity

Abstract Iodine plays a significant role in industry and in chemical processes within living organisms. However, radioiodine exposure possess threats such as thyroid cancer to humans, when they are released into the environment when using nuclear technology and through nuclear accidents. Its capture and storage is critical to safeguard industrial applications while preventing environmental leakages. Herein we report efficient radioiodine capture using a hierarchical nitrogen-doped, large surface area, nanoporous carbon derived from ultrasonication of ZIF-8. The carbon exhibited high adsorption capacity of 434 wt% gravimetrically and 1418 mgg− 1 in cyclohexane solution with fast kinetics and high recoverability. We deduced the high adsorption capacity to be due to the large surface area with micro and mesopores, presence of hydroxyl groups acting as electron donors and the presence of nitrogen, which interacts strongly with the electron-deficient iodine (I2). Moreover, the process best fits the pseudo-second-order and Freundlich models with multilinearity observed with Webber-Morris model. Because of its comparatively lower cost, large surface area, facile preparation, good regeneration and fast kinetics, the as-prepared porous carbon shows exceptional promise as radioiodine adsorbent.

Magnetically separable nitrogen-doped mesoporous carbon with high adsorption capacity

2016 ◽  
Vol 51 (8) ◽  
pp. 3868-3879 ◽  
Author(s):  
Tao Liang ◽  
Fangxiao Wang ◽  
Lin Liang ◽  
Mengshuai Liu ◽  
Jianmin Sun
Keyword(s):  
Adsorption Capacity ◽  
Mesoporous Carbon ◽  
High Adsorption ◽  
Nitrogen Doped ◽  
High Adsorption Capacity ◽  
Magnetically Separable

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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