scholarly journals HEXAVALENT CHROMIUM ADSORPTION REMOVAL FROM AQUEOUS SOLUTION BY FE-MODIFIED BIOCHAR DERIVED FROM RICE STRAW

2019 ◽  
Vol 17 (6) ◽  
Author(s):  
L Q FAN
Keyword(s):  
Aqueous Solution ◽  
Rice Straw ◽  
Hexavalent Chromium ◽  
Modified Biochar ◽  
Adsorption Removal ◽  
Chromium Adsorption

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 Hexavalent chromium adsorption from aqueous solution using orange peel modified with calcium chloride: equilibrium and kinetics study

2018 ◽  
Vol 11 (17) ◽  
pp. 1-10 ◽  
Author(s):  
C. Tejada-Tovar ◽  
A. Herrera-Barros ◽  
A. Villabona-Ort�z ◽  
A. Gonz�lez-Delgado ◽  
J. N��ez-Zarur ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Calcium Chloride ◽  
Hexavalent Chromium ◽  
Orange Peel ◽  
Kinetics Study ◽  
Equilibrium And Kinetics ◽  
Chromium Adsorption

Hexavalent chromium adsorption from aqueous solution using carbon nano-onions (CNOs)

Chemosphere ◽  
2017 ◽  
Vol 184 ◽  
pp. 1168-1174 ◽  
Author(s):  
Chainarong Sakulthaew ◽  
Chanat Chokejaroenrat ◽  
Amnart Poapolathep ◽  
Tunlawit Satapanajaru ◽  
Saranya Poapolathep
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Chromium Adsorption

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.

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