Abstract
Cellulose emerges as an alternative for the treatment of water contaminated with heavy metals due to its abundant biomass and its proven potential in the adsorption of pollutants. The aquatic plant Eichhornia crassipes is an option as raw material in the contribution of cellulose due to its enormous presence in contaminated wetlands, rivers, and lakes. The efficiency in the removal of heavy metals is due to the cation exchange between the hydroxyl groups and carboxyl groups present in the biomass of E. crassipes with heavy metals. Through different chemical and physical transformations of the biomass of E. crassipesThe objective of this review article is to provide a discussion on the different mechanisms of adsorption of the biomass of E. crassipes to retain heavy metals and dyes. In addition to estimating equilibrium, times through kinetic models of adsorption and maximum capacities of this biomass through equilibrium models with isotherms, in order to design one biofilter for treatment systems on a larger scale represented the effluents of a real industry.
Highlights
The contamination of rivers, lakes, and wetlands among others is increasingly evident; the lack of corporate responsibility and the lack of alternatives for water treatment is one of the main problems that leads to the serious affectation of these water resources with different pollutants like heavy metals.At present, different technologies are available for the removal of heavy metals using treatment systems such as advanced chemical oxidation, membrane separation, photocatalysis, oxidation, and adsorption (Crini 2005), but these treatment systems are usually very costly
Almost all adsorbents are developed for the removal of heavy metal ions and based on the interaction with the functional groups that are present in the adsorbents (Hokkanen et al 2014; Yu et al 2013; Ruan et al 2016)
Colombia is the country more contaminated with mercury of latinoamerica, due the conflicted armaded of very years. This biotechnology is one solutions economic and efficient for treatment of water contaminated with different heavy metals
Summary
The contamination of rivers, lakes, and wetlands among others is increasingly evident; the lack of corporate responsibility and the lack of alternatives for water treatment is one of the main problems that leads to the serious affectation of these water resources with different pollutants like heavy metals. Zhang et al (2015), in the experimental process of adsorption cadmium by biochar of E. crassipes, followed the kinetic model of pseudo second order, reaching equilibrium after 24 h with an initial Cd ranging between 100 and 500 mg/L, concluding that quimiadsorcion is a process by which there was a removal. This process was modeled through the second order model, determining a cationic exchange of chemisorption, and with this model, the equilibrium capacity of 20 min was determined with initial concentration of 100 mg/L of As (V)
Sign-in/Register to view highlights & summary 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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
