Abstract
Native banana pith (NBP) was modified by using nitrilotriacetic acid to increase its efficiency and adsorption capacity for methylene blue (MB) dye. The effect of various parameters such as pH, contact time and initial dye concentration, sorption isotherm and adsorbent dosage were studied. The maximum adsorption capacity of the NBP and NTA-BP is 100 and 142.86 mg/g, respectively. The IR spectrum of NBP and NTA-BP showed the presence of both carboxyl and hydroxyl groups. From the SEM micrographs, the surface morphology of NTA-BP before adsorption appeared to be smoother as compared to that after adsorption process. The pH(pzc) of NBP is 5.6 whereas for NTA-BP is 7.6. The experimental data fitted well into Langmuir isotherm with R(2) of 0.992. Plackett-Burman design was applied to identify the significant factors in affecting the uptake whereas the interaction between the factors and their optimum levels for the maximum percentage uptake of MB were determined using response surface methodology (RSM). Based on the results, the optimum condition for adsorption of MB was by using 0.06 g of NTA-BP in dye solution at pH 6 with 120 minutes contact time. The maximum adsorption of MB by NTA-BP achieved 99.42% under the optimum condition.
Highlights
Nowadays, dyes are heavily consumed in various industries and there are more than 100,000 commercial dyes with a rough estimated production of 7 × 105 to 1 × 106 tons per year.[1,2,3] The source of wastewaters that contain dyes are mainly come from textile industries and followed by paper, plastic and cosmetic industries
The IR spectrum of NTA-banana pith (BP) showed the presence of carboxyl and hydroxyl groups
The present study shows that modification of banana pith with nitrilotriacetic acid (NTA-BP) resulted in the formation of an efficient adsorbent to remove basic dye, Methylene Blue from aqueous environment
Summary
Dyes are heavily consumed in various industries and there are more than 100,000 commercial dyes with a rough estimated production of 7 × 105 to 1 × 106 tons per year.[1,2,3] The source of wastewaters that contain dyes are mainly come from textile industries and followed by paper, plastic and cosmetic industries. Methylene Blue (MB) dye is commonly used in silk fabric, hemp, stained paper dyeing and wood coloring. It is a cationic dye that dissociates into a positively charged component and chloride ion when dissolve in aqueous medium. This type of basic dye is generally more toxic than other classes of dyes.[6] the removal of MB from industrial effluents is of utmost importance and can be considered as a challenging problem in the control of environmental pollution as dyes are generally stable to light, oxidizing agent, and are resistant to aerobic digestion. Close study of the dyes has revealed that carcinogenicity is linked to specific types of dye intermediates or metabolites, such as benzidines
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
