Multi-cycle aqueous arsenic removal by novel magnetic N/S-doped hydrochars activated via one-pot and two-stage schemes

2022 ◽  
Vol 429 ◽  
pp. 132071
Author(s):  
Hongxu Chen ◽  
Jiatao Xu ◽  
Hailong Lin ◽  
Zihan Wang ◽  
Zhidan Liu
Keyword(s):  
Arsenic Removal ◽  
Two Stage ◽  
One Pot

scholarly journals Sheetlike gold nanostructures/graphene oxide composites via a one-pot green fabrication protocol and their interesting two-stage catalytic behaviors

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 51838-51846 ◽  
Author(s):  
Guangwei Geng ◽  
Penglei Chen ◽  
Bo Guan ◽  
Yu Liu ◽  
Changchun Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Gold Nanostructures ◽  
Two Stage ◽  
One Pot ◽  
Catalytic Behavior ◽  
Green Protocol ◽  
Catalytic Reactivity ◽  
Oxide Composites

Au nanoplate/GO composites are facilely synthesized via a one-pot green protocol. The composites display a fascinating two-stage catalytic behavior, where the catalytic reactivity of the latter stage increases substantially by a factor of 9 times.

One Pot, One Feeding Step, Two-Stage Polymerization Synthesis and Characterization of (PTT-b-PTMO-b-PTT)n Multiblock Copolymers

2013 ◽  
Vol 46 (18) ◽  
pp. 7274-7281 ◽  
Author(s):  
Qiaozhen Xu ◽  
Jianying Chen ◽  
Weichun Huang ◽  
Taoguang Qu ◽  
Xiaohong Li ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Multiblock Copolymers ◽  
Two Stage ◽  
One Pot

scholarly journals Arsenic Removal from Water by Adsorption onto Iron Oxide/Nano-Porous Carbon Magnetic Composite

2019 ◽  
Vol 9 (18) ◽  
pp. 3732 ◽  
Author(s):  
Sahira Joshi ◽  
Manobin Sharma ◽  
Anshu Kumari ◽  
Surendra Shrestha ◽  
Bhanu Shrestha
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Arsenic Removal ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Magnetic Composite ◽  
One Pot ◽  
Magnetic Fe3o4

This study aimed to develop magnetic Fe3O4/sugarcane bagasse activated carbon composite for the adsorption of arsenic (III) from aqueous solutions. Activated carbon (AC) was prepared from sugarcane bagasse by chemical activation using H3PO4 as an activating agent at 400 °C. To enhance adsorption capacity for arsenic, the resultant AC was composited with Fe3O4 particles by facile one-pot hydrothermal treatment. This method involves mixing the AC with aqueous solution of iron (II) chloride tetrahydrate, polyvinyl pyrrolidone (PVP), and ethanol. Batch adsorption experiments were conducted for the adsorption of As (III) onto the composite. The effects of pH, adsorbent dosage, and contact time on the arsenic adsorption were studied. The result showed that the composite could remove the arsenic from the water far more effectively than the plain AC. The highest percentage of arsenic removal was found at pH at 8, adsorbent dose of 1.8 g/L, and contact time of 60 min. Langmuir and Freundlich adsorption isotherm was used to analyze the equilibrium experimental data. Langmuir model showed the best fit compared to the Freundlich model with a maximal capacity of 6.69 mg/g. These findings indicated that magnetic Fe3O4/sugarcane bagasse AC composite could be potentially applied for adsorptive removal of arsenic (III) from aqueous solutions.

Facile one-pot construction of α-Fe 2 O 3 /g-C 3 N 4 heterojunction for arsenic removal by synchronous visible light catalysis oxidation and adsorption

2017 ◽  
Vol 194 ◽  
pp. 1-8 ◽  
Author(s):  
Suwen Sun ◽  
Chunnuan Ji ◽  
Lingling Wu ◽  
Shenghua Chi ◽  
Rongjun Qu ◽  
...  
Keyword(s):  
Visible Light ◽  
Arsenic Removal ◽  
One Pot

scholarly journals One-pot, large-scale synthesis of magnetic activated carbon nanotubes and their applications for arsenic removal

2013 ◽  
Vol 1 (15) ◽  
pp. 4662 ◽  
Author(s):  
Jie Ma ◽  
Zhiliang Zhu ◽  
Bo Chen ◽  
Mingxuan Yang ◽  
Huiming Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Large Scale ◽  
Arsenic Removal ◽  
One Pot ◽  
Magnetic Activated Carbon ◽  
Large Scale Synthesis

scholarly journals Highly selective synthesis of 2,5-bis(aminomethyl)furan via catalytic amination of 5-(hydroxymethyl)furfural with NH3 over a bifunctional catalyst

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38877-38881 ◽  
Author(s):  
Hangkong Yuan ◽  
Bright T. Kusema ◽  
Zhen Yan ◽  
Stéphane Streiff ◽  
Feng Shi
Keyword(s):  
Efficient Method ◽  
Bifunctional Catalyst ◽  
Reaction Process ◽  
Selective Synthesis ◽  
Two Stage ◽  
One Pot ◽  
Hydroxymethyl Furfural ◽  
Highly Efficient ◽  
Catalytic Amination

A simple and highly efficient method was developed for one pot transformation of 5-(hydroxymethyl)furfural (5-HMF) into 2,5-bis(aminomethyl)furan (BAF) over bifunctional Cu4Ni1Al4Ox catalyst using two-stage reaction process, affording the BAF in 85.9% yield.

Two-stage one-pot synthesis of N-(dibutylaminomethyl)methacrylamide by Mannich reaction under mild conditions with high yield

2020 ◽  
Vol 5 (9) ◽  
pp. 1791-1797
Author(s):  
Oleg A. Kazantsev ◽  
Ildar R. Arifullin ◽  
Maria V. Savinova ◽  
Alexey P. Sivokhin ◽  
Yevgeniya A. Bol'shakova ◽  
...  
Keyword(s):  
Mannich Reaction ◽  
High Yield ◽  
Two Stage ◽  
One Pot ◽  
Mild Conditions ◽  
One Pot Synthesis ◽  
By Products

N-(Dibutylaminomethyl)methacrylamide can be easily obtained via a two-stage one-pot Mannich reaction under mild conditions. By-products are practically absent and the monomer can be easily isolated from the reaction mixture with a 96% yield.

scholarly journals Arsenic removal from water using a one-pot synthesized low-cost mesoporous Fe-Mn-modified biosorbent

2019 ◽  
Vol 84 (3) ◽  
pp. 327-342 ◽  
Author(s):  
Jasmina Nikic ◽  
Malcolm Watson ◽  
Aleksandra Tubic ◽  
Marijana Kragulj-Isakovski ◽  
Snezana Maletic ◽  
...  
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Drinking Water Treatment ◽  
Arsenic Species ◽  
Point Of Zero Charge ◽  
Adsorption Model ◽  
One Pot ◽  
Adsorption Sites ◽  
Simultaneous Oxidation ◽  
Intra Particle Diffusion

This paper investigates the removal of arsenic from water using an environmentally friendly modified biosorbent, chitosan coated with Fe?Mn binary oxide (Chit-FeMn), simply prepared with an one-pot low-cost procedure by simultaneous oxidation and coprecipitation. The sorbent was characterized by SEM, EDS, XRD, FTIR, BET specific surface area, and point of zero charge (pHpzc) measurements. The kinetic data fitted a pseudo-second order model for both As(III) and As(V), suggesting chemical adsorption on the sorbent surface and that intra-particle diffusion is not the only rate-limiting step during adsorption. The adsorption isotherms were best fit to the Freundlich model, and the non-monolayer adsorption model for arsenic on Chit-FeMn is therefore proposed. Below pH 9, the effect of pH on As(III) and As(V) removal by Chit-FeMn was insignificant, with As removals remaining above 85 %. Cl- and NO3 - had negligible influences on As(III) and As(V) removal, whereas PO4 3-, SiO3 2-, CO3 2- and SO4 2- were observed to compete with arsenic species for adsorption sites. The adsorbent was successfully applied to remove arsenic from real arsenic contaminated groundwater samples to below 10 ?g L-1 suggesting that Chit-FeMn is a promising candidate for the low cost removal of both As(V) and As(III) during drinking water treatment.

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