Activated Carbon Fabricated from Biomass for Adsorption/Bio-Adsorption of 2,4-D and MCPA: Kinetics, Isotherms, and Artificial Neural Network Modeling

被引:2
|
作者
Alrowais, Raid [1 ]
Abdel Daiem, Mahmoud M. [2 ,3 ]
Nasef, Basheer M. [4 ,5 ]
Said, Noha [2 ]
机构
[1] Jouf Univ, Coll Engn, Dept Civil Engn, Sakakah 72388, Saudi Arabia
[2] Zagazig Univ, Fac Engn, Environm Engn Dept, Zagazig 44519, Egypt
[3] Shaqra Univ, Coll Engn, Civil Engn Dept, Al Duwadmi 11911, Saudi Arabia
[4] Zagazig Univ, Fac Engn, Comp & Syst Engn Dept, Zagazig 44519, Egypt
[5] Shaqra Univ, Coll Sci & Humanities, Dept Comp Sci, Al Quwaiiyah 11961, Saudi Arabia
关键词
adsorption; bio-adsorption; activated carbon; wheat straw; herbicides; artificial intelligence; radial basis function neural network; WHEAT-STRAW; WASTE; DYES;
D O I
10.3390/su16010299
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Adsorption is an effective and economical alternative to remove herbicides from polluted water. The aim of this study is to investigate the adsorption of the most common herbicides (2,4-dichlorophenoxy-acetic acid (2,4-D) and 4-chloro-2-methylphenoxyacetic acid (MCPA)) onto activated carbon (AC) fabricated from wheat straw under different conditions. The adsorption of MCPA and 2,4-D onto the selected AC (CLW) and the effects of the ionic strength, the solution pH, and the presence of microorganisms in the medium were investigated. The results showed that the selected AC had a high surface area (1437 m2/g). The adsorption rate increased with an increase in the AC mass. The selected AC had a higher adsorption capacity (1.32 mmol/g) for 2,4-D compared to MCPA (0.76 mmol/g). The adsorption of 2,4-D and MCPA was not affected by variation in the solution pH. However, the presence of electrolytes exerted a major effect on adsorption. The presence of microorganisms enhanced adsorption onto the AC by 17% and 32% for 2,4-D and MCPA, respectively. Moreover, a radial basis function neural network (RBFNN) was employed to accurately predict the adsorption capacity based on the pollutant type, carbon dose, initial concentration, pH, ionic strength, and presence of bacteria. The RBFNN showed excellent accuracy in predicting the adsorption capacity, with an R2 value of 0.96 and a root mean square error (RMSE) of 0.054. These findings showed that the AC fabricated from biomass residues of wheat straw is a promising option to recycle this type of biomass waste and reduce environmental threats, consequently contributing to achieving sustainability.
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页数:22
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