Direct Blue 86 textile dye removal from aqueous solution using rice husk-based adsorbent

Authors

M. Zulbahari M. Zua, Former student, Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
Muhammad Raza Ul Mustafa, Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS 32610 Seri Iskandar, Perak Darul Ridzuan, MalaysiaFollow
Mohamed Hasnain Isa, Civil Engineering Programme, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei DarussalamFollow
Teh Sabariah Binti Abd Manan, Institute of Tropical Biodiversity and Sustainable Development, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu Darul Iman, Malaysia
Naimah Ibrahim, Faculty of Civil Engineering and Technology, Universiti Malaysia Perlis, 02600, Arau, Perlis, Malaysia
Rozeana Hj Md Juani, Civil Engineering Programme, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei Darussalam
Wida Susanty Hj Suhaili, School of Computing and Informatics, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei Darussalam
Asmaal Muizz Sallehhin Bin Hj Mohammad Sultan, Civil Engineering Programme, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei Darussalam
Zuliana Binti Hj Nayan, Civil Engineering Programme, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei Darussalam

Abstract

Adsorption by activated carbon is an effective method of dye removal. However, due to high production and regeneration costs of activated carbon, various studies on low-cost adsorbents have been conducted. Agricultural waste such as rice husk (RH) is seen to be a good adsorbent for dye removal. Moreover, rice husk is readily available. In this study, rice husk-based adsorbents were prepared by chemical and thermal treatments. Standard curve (colour vs absorbance) for Direct Blue 86 (DB 86) was prepared to determine the concentration of dye before and after adsorption. The adsorption potential of the adsorbent for textile dye DB 86 was evaluated by batch adsorption tests. The most effective adsorbent, RH6, was selected and its DB 86 adsorption capacity was determined and compared with that of commercial powdered activated carbon (PAC). The optimum pH for DB 86 removal was pH 2 for both adsorbents. The optimum contact time was observed to be 180 min for both RH6 and PAC. The optimum adsorbent dosage was 4 g/L for RH6 and 3 g/L for PAC. Both Langmuir and Freundlich isotherm models provided high correlation coefficients R2 (>0.97); with Langmuir isotherm R2 >0.99. The adsorption capacity obtained was 34.4828 mg/g and 47.6190 mg/g for RH6 and PAC, respectively. Pseudo second order kinetic model yielded high R2 values (>0.99) and much closer values of qe,exp and qe,cal (amounts of solute adsorbed determined experimentally and using the model equation) to show that the model describes the adsorption mechanism better than the pseudo first order kinetic model. RH6 has potential to be used as adsorbent for dye removal from wastewater.

Keywords

Adsorption, Direct Blue 86, Rice husk, Isotherms, Kinetics

Publication Date

2024

Received Date

15 September 2023

Revised Date

20 October 2023

Accepted Date

29 October 2023

Recommended Citation

Zua, M. Zulbahari M.; Mustafa, Muhammad Raza Ul; Isa, Mohamed Hasnain; Manan, Teh Sabariah Binti Abd; Ibrahim, Naimah; Juani, Rozeana Hj Md; Suhaili, Wida Susanty Hj; Sultan, Asmaal Muizz Sallehhin Bin Hj Mohammad; and Nayan, Zuliana Binti Hj (2024) "Direct Blue 86 textile dye removal from aqueous solution using rice husk-based adsorbent," ASEAN Journal on Science and Technology for Development: Vol. 40: No. 3, Article 13.
DOI: https://doi.org/10.61931/2224-9028.1552
Available at: https://ajstd.ubd.edu.bn/journal/vol40/iss3/13