Basic Dye Adsorption

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Basic dye adsorption refers to the process by which basic dyes, which are cationic in nature, adhere to solid surfaces, typically through physical or chemical interactions. This phenomenon is significant in wastewater treatment and material science, as it influences the removal of colorants from effluents and the development of adsorbent materials.

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A study of removal of basic violet 14 dye using prosopis juliflora bark

by Dr Lopa K Sanghavi

2017, BulletinofEnvironmentalandScientiﬁcResearch

The adsorption of dyes from aqueous solutions using various adsorbents has proved to be a promising approach in wastewater treatment units. Recently a number of adsorbents have been tested for their utility for waste water treatment. This... more

the points at which the initial and final pH values were equal (Mustafa et al. 2013) shown in Fig.5. From the graph, the values of pHpzc of PJB were determined from the points where the initial pH equals the final pH. From the graph, it can be found out that pHzpc of Prosopis juliflora bark is 4.4. Figure 5: Point zero charge of Prosopis juliflora bark powder

raw Prosopis Juliflora bar ks were collected from in and around the rural regions of Kutch. The collected Prosopis Juliflora barks were cut into pieces and were thoroughly washed with c ean water 4-5 times to re- move dust and other impurities. The raw Prosopis Juliflora barks were sun dried for one week and then dried in an oven at around 105°C for one hour. These were then crushed in a grinder to obtain bark powder and sieved to 300 ttm mesh particle size, then stored in plastic containers. The resulting powder (PJB) was used for adsorption experiment. and around the rural regions of Kutch. The collected

Figure 8: . Effect of amount of adsorbent for the removal of Basic violet 14 by PJB

Table 2: Physico-chemical characteristics of PJB 3.2.2 Effect of contact time

Figure 7: Effect of contact Time for the uptake of Basic violet 14 by PJB

Figure 9: Effect of Initial dye concentration for the re- moval of Basic violet 14 by PJB The adsorption is greatly influenced by the concen- tration of the solution, as the adsorptive reactions are directly proportional to the concentration of the solute (Friedrich Helfferich 1962).In fig.9 the plot of Initial dye concentration vs. % of removal showed that the amount of adsorbed dye increase with increase in concentra- tion. This study showed that the rate of removal of dye is faster at lower concentration of dye solution and it decrease with higher concentration of dye solution. Results show that optimum dose for the dye being 10 mg/L. Though we find 93.34 % removal at 15mg/L, but this is nearly the same as we get in 10 mg/Li.e. 93.24 %. So going for 15mg/L will only be expensive and loss of adsorbent. Therefore Optimum dye concentration is 10 mg/L. 4 Conclusion and Future scope The result of this study clearly shows that PJB is very effective in removal of BV 14 and can provide an eco- nomical solution for removal of dye from the aqueous solution. The batch studies clearly indicates PJB exhibit adsorption ability toward BV 14 and can remove upto 93% of the 10 mg/L dye solutions using 125 mg/ 50 ml Adsorbent dosage at 350C temp. The adsorption pat- tern of dyes on the PJB was pH-dependent and maxi- mum Removal at the final pH of 5. The shifting in peaks and changes in some of the peak positions in FTIR re- veals that the adsorbent containing functional groups are bound with dye and the adsorption of dye was ef- fective. Since the raw material Prosopis juliflora bark is freely available in large quantities in surrounding ar- eas so method seems to be economical. Undoubtedly such low-cost adsorbents offer a lot of promising bene- fits for commercial purposes with respect to utilization and minimization of waste as dual purpose solving. The results would be useful for the fabrication and designing of wastewater treatment plants for the removal of dye. The design and efficient operation of adsorption pro- cesses require adsorption equilibrium data so the study of kinetic Isotherms models is needed.

Figure 4: FTIR spectrum of PJB before and after adsorp- tion (Prosopis Juliflora bark and Dye loaded Prosopis Juliflora bark )

The Adsorbents were characterized by determining Moisture content, Ash content, Volatiles Content, fixed carbon Using Proximate Analysis. Bulk Density was de- termined using Archimedes‘s principle. The pH at the point of zero charge (p the pH drift method. Hzpc) was measured by using The surface functional groups of the adsorbent studied by Fourier transform infrared (FTIR) spectroscopy in the frequency range from 4000 cm7! to 400 cm7!. spectrophotometrically at 540 nm using a UV-V] Dye concentration was estimated by monitoring the absorbance S spectrophotometer. Calibra- tion curve for BV 14 is given in Fig. 3.

Table 1: Physicochemical properties of the dye BV14 (Oyelude et al. 2015)

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Basic Dye Adsorption

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