@article{fdi:010085292, title = {{R}emoval of methylene blue from aqueous solution by biochar derived from rice husk}, author = {{B}uil, {H}. {T}. and {L}eo, {P}. {T}. and {N}guyen, {T}. {P}. and {L}el, {D}. {N}. and {V}ol, {D}. {L}. and {P}haml, {L}. and {N}guyenl, {L}. {L}. and {N}guyen, {T}. {H}. and {L}e, {T}. {V}. and {H}uongl, {M}. and {D}inhr, {T}. {M}. {T}. and {H}errmann, {M}arine and {O}uillon, {S}ylvain and {D}uong, {T}. {T}. and {L}e, {T}. {P}. {Q}.}, editor = {}, language = {{ENG}}, abstract = {{I}n this research, rice husk-derived biochar ({BC}) was evaluated to determine the suitable conditions for the methylene blue ({MB}) solution adsorption. {T}he characterization of {BC} was identified by the methods of {FT}-{IR}, {R}aman, and point of zero charges ({PZC}). {T}he adsorption studies were carried out with {BC} at different activation conditions (raw {BC}, {HNO}3 25% for 4 hours, {N}a{OH} 25% for 4 hours, {H}2{O} at 90 degrees {C} for 2 hours and 4 hours, {HNO}3 25% at 90 degrees {C} for 2 hours and 4 hours). {T}he activated material then went through an adsorption assessment. {A}ctivated {BC} with {N}a{OH} 25% showed its preeminence compared to the other six conditions when reaching the maximum efficiency after the first hour of adsorption. {T}he investigation revealed that the adsorption capacity of the material depends on the activation methods, including p{H}, activation agent, temperature, and time. {T}he adsorption of {BC} was consistent with the pseudo-first-order kinetic model and the {L}angmuir isotherm model, with high correlation coefficients ({R}-2 :0.9838 and 0.9975, respectively). {T}herefore, it can be concluded that the use of rice husk is feasible for the removal of {MB} from aqueous solutions.}, keywords = {{B}iochar ; {M}ethylene blue ; adsorption ; rice husk ; {VIET} {NAM}}, booktitle = {}, journal = {{V}ietnam {J}ournal of {E}arth {S}ciences}, volume = {44}, numero = {2}, pages = {273--285}, ISSN = {0866-7187}, year = {2022}, DOI = {10.15625/2615-9783/16998}, URL = {https://www.documentation.ird.fr/hor/fdi:010085292}, }