Facile one-step synthesis of magnetically modified biochar with enhanced removal capacity for hexavalent chromium from aqueous solution

2017 ◽  
Vol 81 ◽  
pp. 414-418 ◽  
Author(s):  
Fei Wang ◽  
Lan-Yao Liu ◽  
Fang Liu ◽  
Lian-Gui Wang ◽  
Tong Ouyang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Modified Biochar ◽  
Removal Capacity ◽  
One Step

scholarly journals Efficient Removal of Diclofenac from Aqueous Solution by Potassium Ferrate-Activated Porous Graphitic Biochar: Ambient Condition Influences and Adsorption Mechanism

2019 ◽  
Vol 17 (1) ◽  
pp. 291 ◽  
Author(s):  
Nguyen Thi Minh Tam ◽  
Yunguo Liu ◽  
Hassan Bashir ◽  
Zhihong Yin ◽  
Yuan He ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Diclofenac Sodium ◽  
Maximum Adsorption Capacity ◽  
Potassium Ferrate ◽  
Solution Ph ◽  
Modified Biochar ◽  
Prepared Material ◽  
Endothermic Process ◽  
One Step

Porous graphitic biochar was synthesized by one-step treatment biomass using potassium ferrate (K2FeO4) as activator for both carbonization and graphitization processes. The modified biochar (Fe@BC) was applied for the removal of diclofenac sodium (DCF) in an aqueous solution. The as-prepared material possesses a well-developed micro/mesoporous and graphitic structure, which can strengthen its adsorption capacity towards DCF. The experimental results indicated that the maximum adsorption capacity (qmax) of Fe@BC for DCF obtained from Langmuir isotherm simulation was 123.45 mg·L−1 and it was a remarkable value of DCF adsorption in comparison with that of other biomass-based adsorbents previously reported. Thermodynamic quality and effect of ionic strength studies demonstrated that the adsorption was a endothermic process, and higher environmental temperatures may be more favorable for the uptake of DCF onto Fe@BC surface; however, the presence of NaCl in the solution slightly obstructed DCF adsorption. Adsorption capacity was found to be decreased with the increase of solution pH. Additionally, the possible mechanism of the DCF adsorption process on Fe@BC may involve chemical adsorption with the presence of H-bonding and π–π interaction. With high adsorption capacity and reusability, Fe@BC was found to be a promising absorbent for DCF removal from water as well as for water purification applications.

One-pot synthesis of nitrogen-enriched carbon spheres for hexavalent chromium removal from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 33055-33062 ◽  
Author(s):  
Fuquan Lin ◽  
Yonghao Wang ◽  
Zhang Lin
Keyword(s):  
Aqueous Solution ◽  
Nitrogen Content ◽  
Hexavalent Chromium ◽  
Chromium Removal ◽  
Carbon Spheres ◽  
High Nitrogen Content ◽  
High Nitrogen ◽  
One Pot ◽  
One Pot Synthesis ◽  
Removal Capacity

Nitrogen-enriched carbon spheres (NECS) with high nitrogen content (10.21 wt%) had been prepared and presented superior Cr(vi) removal capacity as high as 279 mg g−1.

scholarly journals High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal

RSC Advances ◽  
2019 ◽  
Vol 9 (22) ◽  
pp. 12428-12435 ◽  
Author(s):  
Shifeng Li ◽  
Tingting You ◽  
Yang Guo ◽  
Shuhua Yao ◽  
Shuyan Zang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Zero Valent Iron ◽  
Synthesis And Characterization ◽  
Carbothermal Synthesis ◽  
Nanoscale Zero Valent Iron ◽  
Nano Zero Valent Iron ◽  
One Step

A one-step carbothermal synthesis and characterization of biochar-supported nanoscale zero-valent iron (nZVI/BC) was performed for the removal of hexavalent chromium (Cr(vi)) from aqueous solution.

scholarly journals Synthesis of Iron-Modified Biochar Derived from Rice Straw and Its Application to Arsenic Removal

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Thi Hanh Nguyen ◽  
Thi Huong Pham ◽  
Hong Tham Nguyen Thi ◽  
Thi Nham Nguyen ◽  
Minh-Viet Nguyen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rice Straw ◽  
Arsenic Removal ◽  
Order Model ◽  
Solution Ph ◽  
Environmentally Sustainable ◽  
Modified Biochar ◽  
Removal Capacity ◽  
Pseudo Second Order ◽  
Edx Analyses

A novel iron-modified biochar (FMBC) derived from rice straw was synthesized using FeCl3 modification for efficient As(V) removal from aqueous solution. FTIR and SEM-EDX analyses were carried out to determine the mechanism involved in the removal process and also demonstrated that Fe had loaded successfully on the surface of modified biochar. The iron-modified biochar showed higher arsenic removal ability than the raw biochar. The iron-modified biochar showed a maximum adsorption with an initial solution pH of 5.0. Moreover, for the tested biochar, the As(V) removal kinetics data were well fitted by the pseudo-second-order model. Furthermore, the As(V) removal data upon being well fitted by the Langmuir model showed the maximal removal capacity of 28.49 mg/g. The simple preparation process and high adsorption performance suggest that the iron-modified biochar derived from rice straw could be served as an effective, inexpensive, and environmentally sustainable adsorbent to replace typical granular activated carbon (AC) for As(III) removal from aqueous solution.

scholarly journals Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0Nanoparticles

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Yongchao Li ◽  
Hongpu Ma ◽  
Bozhi Ren ◽  
Tielong Li
Keyword(s):  
Aqueous Solution ◽  
Active Site ◽  
Removal Rate ◽  
Core Shell ◽  
Simultaneous Removal ◽  
Stöber Method ◽  
Removal Capacity ◽  
Batch Tests ◽  
One Step ◽  
Modified Stöber Method

Core-shell silica-coated Fe0nanoparticles (Fe@SiO2) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO2were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO2exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO2through reduction rather than adsorption, while Cd(II) removal was mainly through adsorption. The removal rate increased with increasing initial Fe NPs dose and decreased with increasing initial Cr(VI) and Cd(II) concentrations. Cd(II) adsorption was also strengthened by Cr(VI) reduction with the release of OH−. The removals of Cr(VI) and Cd(II) were weakened in the presence of cations or humic acid, as a result of aggregation and less active site of Fe@SiO2. Overall, the simply prepared Fe@SiO2were potential material for the heavy metals removed from water.

Polyethylenimine modified biochar adsorbent for hexavalent chromium removal from the aqueous solution

2014 ◽  
Vol 169 ◽  
pp. 403-408 ◽  
Author(s):  
Ying Ma ◽  
Wu-Jun Liu ◽  
Nan Zhang ◽  
Yu-Sheng Li ◽  
Hong Jiang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Chromium Removal ◽  
Modified Biochar

Breakthrough analysis for hexavalent chromium removal from drinking water in a fixed bed column

2009 ◽  
Vol 9 (6) ◽  
pp. 661-670 ◽  
Author(s):  
S. P. Dubey ◽  
K. Gopal
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Fixed Bed ◽  
Entropy Change ◽  
Spectroscopic Technique ◽  
Fixed Bed Column ◽  
Chromium Vi ◽  
Fixed Bed Adsorption ◽  
Optimal Column ◽  
Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

A Simple Synthesis of the Anticancer Drug Altretamine

2020 ◽  
Vol 17 (8) ◽  
pp. 628-630
Author(s):  
Vu Binh Duong ◽  
Pham Van Hien ◽  
Tran Thai Ngoc ◽  
Phan Dinh Chau ◽  
Tran Khac Vu
Keyword(s):  
Aqueous Solution ◽  
Anticancer Drug ◽  
Potassium Hydroxide ◽  
Large Scale ◽  
Synthesis Method ◽  
Practical Method ◽  
Cyanuric Chloride ◽  
Simple Synthesis ◽  
High Yield ◽  
One Step

A simple and practical method for the synthesis on a large scale of altretamine (1), a wellknown antitumor drug, has been successfully developed. The synthesis method involves the conversion of cyanuric chloride (2) into altretamine (1) by dimethylamination of 2 with an aqueous solution of 40% dimethylamine and potassium hydroxide in 1, -dioxan 4in one step to give altretamine (1) in high yield.

Sign in / Sign up

Export Citation Format

Share Document