Efficient Biosorption of Cationic Dyes using Biopolymeric Adsorbent Pectin Extract Polysaccharide and Carrageenan Grafted Cellulosic Textile

Susan Moore^*
*Correspondence: Susan Moore, Department of Textile Engineering, California Institute of Technology, Pasadena, CA 91109, USA, Email:

Introduction

The increasing prevalence of water pollution, particularly due to the discharge of synthetic dyes from industries such as textiles, paper and leather, has prompted significant concern regarding the impact on aquatic ecosystems and human health. Among the various classes of dyes, cationic dyes, which carry a positive charge, pose unique challenges in terms of removal and treatment due to their high solubility and resistance to conventional wastewater treatment methods. Consequently, there is a pressing need for effective and sustainable approaches to remediate dye-laden effluents. Biosorption has emerged as a promising method, leveraging natural adsorbents derived from biological materials to capture and remove contaminants from water. This paper explores the potential of pectin extract polysaccharide and carrageenan grafted cellulosic textile as biopolymeric adsorbents for the efficient biosorption of cationic dyes [1].

Description

Biosorption involves the passive uptake of contaminants by biomass, where various mechanisms, including ion exchange, electrostatic attraction and complexation, play crucial roles. Cationic dyes typically interact with negatively charged functional groups present on the biosorbent's surface. Pectin, a polysaccharide found in the cell walls of plants, possesses carboxyl and hydroxyl groups that can facilitate the binding of cationic dyes. Carrageenan, another biopolymer extracted from red algae, enhances the adsorptive properties of textiles when grafted onto cellulosic materials, increasing surface area and providing additional functional groups for binding. Pectin is recognized for its gelling and thickening properties and is abundant in citrus fruits and apples. Its structure consists of a backbone of galacturonic acid units, which can be methylated or acetylated. The degree of methylation significantly affects its interactions with cationic dyes. In the context of biosorption, the carboxyl groups on pectin can form ionic bonds with positively charged dye molecules, effectively removing them from aqueous solutions. The extraction process of pectin is crucial; methods such as hot water extraction and acid extraction yield different qualities and quantities of pectin, influencing its biosorptive capacity [2].

Carrageenan is a linear polysaccharide composed of repeating units of galactose and anhydrogalactose. Its functional properties are modulated by the specific type of carrageenan used (kappa, iota, or lambda), each exhibiting distinct gel strengths and solubility behaviors. Grafting carrageenan onto cellulosic textiles enhances their structural integrity and increases the availability of functional groups for dye adsorption. The grafting process often involves chemical modification, which can improve the hydrophilicity of the textile and facilitate better interaction with cationic dyes. Several factors influence the efficiency of biosorption using pectin and carrageenan grafted textiles, including pH, contact time, initial dye concentration and temperature. The pH of the solution can significantly impact the ionization state of the biosorbent and the dye, thereby affecting adsorption. Optimal contact time is essential to ensure sufficient interaction between the dye molecules and the biosorbent, while initial concentration determines the driving force for mass transfer. Temperature also plays a role, as it can influence the kinetic energy of molecules and enhance diffusion processes [3].

To fully understand the biosorption mechanisms, it is essential to characterize the biopolymeric adsorbents. Techniques such as Fourier- Transform Infrared Spectroscopy (FTIR) can be employed to identify functional groups responsible for dye binding. Scanning Electron Microscopy (SEM) can provide insights into the surface morphology and porosity of the adsorbents, which are critical for assessing their adsorption capacity. Additionally, surface area analysis using the Brunauer-Emmett-Teller (BET) method can quantify the available surface for dye adsorption, offering a clearer picture of the adsorbent’s efficiency [4].

The performance of pectin extract polysaccharide and carrageenan grafted cellulosic textiles in removing cationic dyes can be evaluated through batch adsorption experiments. By varying parameters such as dye concentration and contact time, researchers can determine the optimal conditions for maximum dye removal. Kinetic studies, often described using models like pseudo-firstorder and pseudo-second-order, can help elucidate the rate of adsorption, while isotherm studies, employing models like Langmuir and Freundlich, provide insights into the adsorption capacity and mechanism. The use of biopolymeric adsorbents such as pectin and carrageenan grafted textiles not only offers an effective method for cationic dye removal but also aligns with sustainable practices. These materials are biodegradable, reducing the environmental footprint associated with synthetic adsorbents. Furthermore, utilizing agricultural byproducts for pectin extraction contributes to waste valorization, enhancing the economic viability of biosorption processes. The scalability of such methods is also a crucial factor; optimizing extraction and grafting processes can lead to cost-effective applications in wastewater treatment [5].

Conclusion

The efficient biosorption of cationic dyes using pectin extract polysaccharide and carrageenan grafted cellulosic textiles presents a viable solution to one of the pressing environmental challenges of our time. By harnessing the natural properties of biopolymers, this approach not only provides an effective means of dye removal but also promotes sustainability through the use of biodegradable materials. The combination of pectin’s functional groups and carrageenan’s structural integrity enhances the biosorption capacity, making it a promising avenue for future research and application in the field of environmental remediation. As water pollution continues to threaten ecosystems and human health, the development and optimization of such biopolymeric adsorbents could play a critical role in creating more sustainable wastewater treatment solutions, ultimately contributing to cleaner water bodies and a healthier environment. Through further research into the mechanisms, performance evaluation and economic implications, we can refine these biosorption techniques to better address the ongoing challenges posed by cationic dye pollution.

Acknowledgement

None.

Conflict of Interest

None.

References

1. Borpatra Gohain, Moucham, Sachin Karki, Diksha Yadav and Archana Yadav, et al. "Development of antifouling thin-film composite/nanocomposite membranes for removal of phosphate and malachite green dye." Membranes 12 (2022): 768.

   Google Scholar, Crossref, Indexed at

2. Ramesh, B., A. Saravanan, P. Senthil Kumar and P. R. Yaashikaa, et al. "A review on algae biosorption for the removal of hazardous pollutants from wastewater: Limiting factors, prospects and recommendations." Environ Pollut 327 (2023): 121572.

   Google Scholar, Crossref, Indexed at

3. Akartasse, Noureddine, Khalil Azzaoui, Elmiloud Mejdoubi and Belkheir Hammouti, et al. "Environmental-friendly adsorbent composite based on hydroxyapatite/hydroxypropyl methyl-cellulose for removal of cationic dyes from an aqueous solution." Polymers 14 (2022): 2147.

   Google Scholar, Crossref, Indexed at

4. Ren, Yongyuan, Jiangna Guo, Qian Lu and Dan Xu, et al. "Polypropylene nonwoven fabric@ poly (ionic liquid) s for switchable oil/water separation, dye absorption and antibacterial applications." ChemSusChem 11 (2018): 1092-1098.

   Google Scholar, Crossref, Indexed at

5. El-Ghoul, Yassine, Chiraz Ammar, Fahad M. Alminderej and Md Shafiquzzaman. "Design and evaluation of a new natural multi-layered biopolymeric adsorbent system-based chitosan/cellulosic nonwoven material for the biosorption of industrial textile effluents." Polymers 13 (2021): 322.

   Google Scholar, Crossref, Indexed at