Adsorption of nitrate by biochar prepared from rice husks (o. Sativa l., om5451)
Vol. 130 No. 1A (2021), Original Article
Vol. 130 No. 1A (2021)

Adsorption of nitrate by biochar prepared from rice husks (o. Sativa l., om5451)

Original Article
https://doi.org/10.26459/hueunijns.v130i1A.5957
Published 2021-03-10
Nguyen Dat Phuong
Urban Infrastructure Faculty, Mien Tay Construction University - 20B Pho Co Dieu St., Ward 3, Vinh Long City, Vinh Long Province
Do Thi My Phuong
College of Environment and Natural Resources, Can Tho University, Campus II, 3/2 street, Xuankhanh precinct, Ninhkieu district, Cantho city
Nguyen Huu Chiem
College of Environment and Natural Resources, Can Tho University, Campus II, 3/2 street, Xuankhanh precinct, Ninhkieu district, Cantho city
Pham Ngoc Thoa
College of Environment and Natural Resources, Can Tho University, Campus II, 3/2 street, Xuankhanh precinct, Ninhkieu district, Cantho city
Nguyen Xuan Loc
College of Environment and Natural Resources, Can Tho University, Campus II, 3/2 street, Xuankhanh precinct, Ninhkieu district, Cantho city
PDF (Vietnamese)

Keywords

Than sinh học
trấu
hấp phụ
nitrate biochar
rice husk
CuII adsorption capacity
nitrate

How to Cite

1.
Phương N Đạt, Phượng Đỗ TM, Chiếm NH, Thoa PN, Lộc NX. Adsorption of nitrate by biochar prepared from rice husks (o. Sativa l., om5451). hueuni-jns [Internet]. 2021Mar.10 [cited 2024Nov.14];130(1A):31-9. Available from: http://222.255.146.83/index.php/hujos-ns/article/view/5957
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Abstract

This study assesses the influence of solution pH, biochar dose, reaction time, and initial nitrate concentration on the nitrate adsorption in aqueous solutions by biochar prepared from rice husks (O. sativa L., OM5451). The biochar was prepared with the pyrolysis method at 700 °C. The pHpzc of the biochar is 9.51. The optimal conditions for the adsorption process include biochar 0.5 g, pH = 4, time 120 minutes, and initial concentration of  50 . Under the optimal conditions, the nitrate removal efficiency is 69.7%. The adsorption equilibrium data are more consistent with the Langmuir isothermal model ( = 0.993) than the Freundlich isothermal model ( = 0.965), and the maximal nitrate adsorption capacity of the biochar, calculated from the Langmuir equation, is 12.843 mg·g–1. The adsorption of the biochar fits well with both the pseudo-first-order kinetic model ( = 0.964) and the pseudo-second-order kinetic model ( = 0.963).

https://doi.org/10.26459/hueunijns.v130i1A.5957
PDF (Vietnamese)

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