Hyperbranched grafting enabling simultaneous enhancement of the boric acid uptake and the adsorption rate of a complexing membrane

2016 ◽  
Vol 4 (30) ◽  
pp. 11656-11665 ◽  
Author(s):  
Jianqiang Meng ◽  
Jingjing Cao ◽  
Ruisong Xu ◽  
Zhe Wang ◽  
Rongbo Sun
Keyword(s):  
Boric Acid ◽  
High Capacity ◽  
Adsorption Rate ◽  
Acid Uptake ◽  
Boron Removal ◽  
High Adsorption ◽  
Step Process ◽  
Hyperbranched Polyols

Hyperbranched polyols were grafted onto a PAN membrane via a two-step process for boron removal. The grafted hyperbranched scaffold was utilized to optimize the ligand distribution so that a complexing membrane with both high capacity and high adsorption rate was obtained.

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 High-performance supercapacitors based on conductive graphene combined with Ni(OH)2 nanoflakes

RSC Advances ◽  
2017 ◽  
Vol 7 (58) ◽  
pp. 36617-36622 ◽  
Author(s):  
Hui Chai ◽  
Xiao Peng ◽  
Ting Liu ◽  
Xiaohui Su ◽  
Dianzeng Jia ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Step Process ◽  
Alkaline Conditions ◽  
One Step

A GNS/Ni(OH)2 composite with high capacity was obtained via a facile and effective one-step process under alkaline conditions.

scholarly journals CRUSTACEAN WASTE SHELLS AS ADSORPTION MATERIALS FOR HEAVY METALS IN AN AQUEOUS SOLUTION

2020 ◽  
Vol 4 (2) ◽  
pp. 33-25
Author(s):  
Queency P. Padida ◽  
Rolando V. Maningas ◽  
Christian Paul P. dela Cruz ◽  
Lustina P. Lapie ◽  
Nilda S. Alforja
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
High Capacity ◽  
Adsorption Rate ◽  
Agriculture Industry ◽  
Laguna De Bay ◽  
High Concentrations

Laguna de Bay is one of the country’s major lakes, providing a third of the fish consumed by Metro Manila’s 16 million residents. It also provides support for agriculture, industry, and hydropower generation, as well as providing a welcome respite for many Filipinos. However, because of the lake’s importance, it is threatened by a variety of issues, including pollution. Heavy metals such as mercury and lead are present in high concentrations in the lake. And these heavy metals may persist in fish, water, air and the human body. As a result, an adsorption technique for heavy metal removal in an aqueous solution was investigated. As an adsorbent, the produced chitosan from crustacean waste shells was employed. The study’s parameters were contact time, adsorbent quantity, and pH. Results showed that 0.5 g of chitosan has a higher absorption rate of 99% in 500 mg/L solutions compared to 1.0 g of chitosan with an adsorption rate of 98%. In terms of contact time, 60 minutes showed almost 100% adsorption rate while 120 minutes was 98%. With increasing pH, the amount of metal adsorption rises. This developed chitosan from crustacean waste shells indicates high capacity as adsorbent materials for heavy metals. As a result, it appears to be a viable material for water treatment.

scholarly journals Production of the Hydroxyl Radical and Removal of Formaldehyde by Calcined Green Tuff Powder and Tile

2019 ◽  
Vol 11 (12) ◽  
pp. 3390 ◽  
Author(s):  
Toyohisa Fujita ◽  
Lanyin Zhang ◽  
Gjergj Dodbiba ◽  
Ji-Whan Anh ◽  
Yuezhou Wei ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Hydroxyl Radicals ◽  
Uv Light ◽  
Adsorption Rate ◽  
Optimum Temperature ◽  
High Adsorption ◽  
Alkaline Conditions ◽  
Formaldehyde Adsorption ◽  
High Decomposition Rate

Waste green tuff powder produced by cutting Towada stone has been utilized to eliminate formaldehyde related to greenhouse gases. The green tuff contains TiO2 on zeolite as observed by scanning electron microscope (SEM)t. The green tuff is a natural catalyst that can produce hydrogen peroxide with moisture and oxygen with light. The optimum temperature for calcination of the green tuff powder has been investigated in order to produce hydroxyl radicals from the decomposition of hydrogen peroxide using ultraviolet light (UV) and no light. The green tuff calcined at 800 °C showed a high decomposition rate of hydrogen peroxide with no UV light under high alkaline conditions when measured by using ESR. With UV light, the optimum temperature for calcination of green tuff powder in order to reduce the hydroxyl radical was also 800 °C. Next, the powder calcined at 800 °C was used to produce the tile by compression and heating, and then the formaldehyde adsorption rate was measured. The green tuff powder calcined at 800 °C showed a high adsorption rate, similar to that of the activated carbon. The tiles formed at 40 MPa and heated at 1100 °C were the strongest and also showed adsorption with respect to formaldehyde. The adsorbed formaldehyde on the green tuff tile and powder was possibility decomposed by the hydroxyl radical produced by photocatalysis.

Macroporous cellulose/carbon nanotube microspheres prepared by surfactant micelles swelling strategy for rapid and high-capacity adsorption of bilirubin

2021 ◽  
Author(s):  
Liangzhi Qiao ◽  
Kaifeng Du
Keyword(s):  
Carbon Nanotube ◽  
Adsorption Capacity ◽  
High Capacity ◽  
Diffusion Path ◽  
Adsorption Kinetic ◽  
Rabbit Serum ◽  
High Adsorption ◽  
Surfactant Micelles ◽  
Formidable Challenge ◽  
High Adsorption Capacity

Abstract It remains a formidable challenge to construct high-performance haemoperfusion adsorbents with fast adsorption kinetic and high adsorption capacity for efficiently removing bilirubin from human blood. In this work, we report a facile yet efficient strategy to manufacture lysine-modified macroporous cellulose/carbon nanotube microspheres (LMCMs) by surfactant micelles swelling strategy followed by modification with lysine. The macroporous structure not only provides wide channels for fast mass transfer, but also shortens the diffusion path into meso/micropores, increasing the accessibility of mesopores and micropores. The experimental results reveal that LMCMs can remove bilirubin with fast adsorption kinetic (> 90% of its equilibrium uptake within 2h) and high adsorption capacity of 338.14 mg/g. More importantly, the adsorbent can remove about 79% of bilirubin in rabbit serum, and the bilirubin concentration decreases from 213.36 mg/L to small than 45.78 mg/L within 2h, indicating a very appealing application prospect.

High adsorption activated calcium silicate enabling high-capacity adsorption for sulfur dioxide

2020 ◽  
Vol 44 (27) ◽  
pp. 11879-11886
Author(s):  
Feng Wang ◽  
Yongfeng Zhang ◽  
Zhihui Mao
Keyword(s):  
Fly Ash ◽  
Sulfur Dioxide ◽  
Calcium Silicate ◽  
Porous Silica ◽  
High Capacity ◽  
High Porosity ◽  
High Adsorption ◽  
Adsorption Performance ◽  
Silicon Sources

Fly ash, with its abundant silicon sources and high porosity, is an excellent precursor of porous silica-based sorbents, which are the key to obtaining high SO2 adsorption performance.

Preparation of TiO2-ACF by Electrospinning and its Adsorption Performance for Low Concentration SO2

2014 ◽  
Vol 852 ◽  
pp. 51-55 ◽  
Author(s):  
Tie Ben Song ◽  
Yan Bo Wu ◽  
Peng Sun ◽  
Jun Bi
Keyword(s):  
Average Diameter ◽  
Activated Carbon Fiber ◽  
Adsorption Rate ◽  
X Ray Diffraction ◽  
High Adsorption ◽  
Adsorption Time ◽  
X Ray ◽  
Low Concentration ◽  
Adsorption Performance ◽  
Scanning Electron

The TiO2-activated carbon fiber (ACF) was successfully prepared by electrospinning and thermal treatment. The nanofiber was characterized by scanning electron microscopy (SEM), thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and Brunner-Emmett-Teller method (BET). The results showed that the average diameter of ACF was in the range 200-500 nm, and the preoxidation temperature and carbonation temperature were 250°C and 500°C, and the anatase TiO2 appeared in fiber after carbonation, and TiO2-ACF specific surface area was 1146.7 m2/g. The TiO2-ACF was used for adsorption of low concentration SO2. The results showed that the adsorption rate increased with an increase in SO2 concentration, furthermore the adsorption rate increased with prolonged adsorption time, the high adsorption rate was 67.6% after 40 min. While temperature was below 60°C, the adsorption rate decreased as the temperature increased, however when temperature was above 60°C, there was a slight increase of adsorption rate as the temperature increased.

scholarly journals High adsorption rate is detrimental to bacteriophage fitness in a biofilm-like environment

2009 ◽  
Vol 9 (1) ◽  
pp. 241 ◽  
Author(s):  
Romain Gallet ◽  
Yongping Shao ◽  
Ing-Nang Wang
Keyword(s):  
Adsorption Rate ◽  
High Adsorption
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