Related Papers
Ecotoxicology and environmental safety
Adsorption of heavy metals on conventional and nanostructured materials for wastewater treatment purposes: A review
2017 •
Evgeny Galunin
The problem of water pollution is of a great concern. Adsorption is one of the most efficient techniques for removing noxious heavy metals from the solvent phase. This paper presents a detailed information and review on the adsorption of noxious heavy metal ions from wastewater effluents using various adsorbents - i.e., conventional (activated carbons, zeolites, clays, biosorbents, and industrial by-products) and nanostructured (fullerenes, carbon nanotubes, graphenes). In addition to this, the efficiency of developed materials for adsorption of the heavy metals is discussed in detail along with the comparison of their maximum adsorption capacity in tabular form. A special focus is made on the perspectives of further wider applications of nanostructured adsorbents (especially, carbon nanotubes and graphenes) in wastewater treatment.
Environments
Function of Nanomaterials in Removing Heavy Metals for Water and Wastewater Remediation: A Review
Nadhir Al-Ansari
Although heavy metals are typically found in trace levels in natural waterways, most of them are hazardous to human health and the environment, even at extremely low concentrations. Nanotechnology and nanomaterials have gained great attention among researchers as a sustainable route to addressing water pollution. Researchers focus on developing novel nanomaterials that are cost-effective for use in water/wastewater remediation. A wide range of adsorbed nanomaterials have been fabricated based on different forms of natural materials, such as carbonaceous nanomaterials, zeolite, natural polymers, magnetic materials, metal oxides, metallic materials, and silica. Hence, this review set out to address the ability of various synthesized nanoadsorbent materials to remove different heavy metal ions from water and wastewater and to investigate the influence of the functionalization of nanomaterials on their adsorption capacity and separation process. Additionally, the effect of experimental ...
Journal of Water Process Engineering
Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review
2020 •
Ayushi Jain
Scientific reports
Rare Earth Elements Removal from Water Using Natural Polymers
2018 •
Alina Barbulescu
Adsorption of rare earth metals, Eu (III) and Nd (III) was investigated on a new environmental friendly material, thiourea functionalized cellulose. Before usage, the synthesized material was characterized by Fourrier Transform Infrared spectroscopy and energy dispersive X-ray analysis. The influence of adsorption parameters (adsorbent dosage, time, temperature and initial metal concentration) on adsorption capacity was investigated. Experimental data were fitted by using the pseudo-first-order and pseudo-second-order kinetic models. Simultaneously thermodynamic and equilibrium studies have been carried out using Langmuir, Freundlich and Sips isotherm. Maximum adsorption capacities were reached in 30 minutes at 298 K having the value of 27 mg/g for Eu (III) and 73 mg/g for Nd (III).
Materials
Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review
Theodoros Karakasidis
Research on contamination of groundwater and drinking water is of major importance. Due to the rapid and significant progress in the last decade in nanotechnology and its potential applications to water purification, such as adsorption of heavy metal ion from contaminated water, a wide number of articles have been published. An evaluating frame of the main findings of recent research on heavy metal removal using magnetic nanoparticles, with emphasis on water quality and method applicability, is presented. A large number of articles have been studied with a focus on the synthesis and characterization procedures for bare and modified magnetic nanoparticles as well as on their adsorption capacity and the corresponding desorption process of the methods are presented. The present review analysis shows that the experimental procedures demonstrate high adsorption capacity for pollutants from aquatic solutions. Moreover, reuse of the employed nanoparticles up to five times leads to an effic...
Environmental Nanotechnology, Monitoring & Management
Technological advancement in the remediation of heavy metals employing engineered nanoparticles: A step towards cleaner water process
Shaili Srivastava
Catalysts
Development of Adsorptive Materials for Selective Removal of Toxic Metals in Wastewater: A Review
Lindiwe Khotseng
Removal of toxic metals is essential to achieving sustainability in wastewater purification. The achievement of efficient treatment at a low cost can be seriously challenging. Adsorption methods have been successfully demonstrated for possession of capability in the achievement of the desirable sustainable wastewater treatment. This review provides insights into important conventional and unconventional materials for toxic metal removal from wastewater through the adsorption process. The importance of the role due to the application of nanomaterials such as metal oxides nanoparticle, carbon nanomaterials, and associated nanocomposite were presented. Besides, the principles of adsorption, classes of the adsorbent materials, as well as the mechanisms involved in the adsorption phenomena were discussed.
Research and Reviews: Journal of Chemistry
Heavy Metal Remediation by Nanosorbents: A Short Review
2019 •
Dr. Shweta Vyas
In present scenario, availability of pure drinking water at reasonable cost is a major issue for developing countries; where in growing economy has created pollution hazards in the form of heavy metal disposals in the water streams. And due to the toxic and persistent nature of these heavy metals, serious problems are faced all over the world. These metals can be absorbed and accumulate in flora and fauna including human body, which may generate severe health problems like cell damage, cancer, nervous system damage, and in acute cases, death. Thus, water the basic need of all living beings, get polluted with these toxic pollutants and become a threat to survival. To meet the requirement of pure water for all, many techniques have been reported in literature like coagulation, chemical precipitation, adsorption, ion exchange, solvent extraction, electro-deposition, membrane operations etc. among all, most widely used technique is adsorption process, as being the most effective and eco...
Molecules
Recovery of Rare Earth Elements from Wastewater Towards a Circular Economy
2019 •
Lara Costa
The use of rare earth elements is a growing trend in diverse industrial activities, leading to the need for eco-friendly approaches to their efficient recovery and reuse. The aim of this work is the development of an environmentally friendly and competitive technology for the recovery of those elements from wastewater. Kinetic and equilibria batch assays were performed with zeolite, with and without bacterial biofilm, to entrap rare earth ions from aqueous solution. Continuous assays were also performed in column setups. Over 90% removal of lanthanum and cerium was achieved using zeolite as sorbent, with and without biofilm, decreasing to 70% and 80%, respectively, when suspended Bacillus cereus was used. Desorption from the zeolite reached over 60%, regardless of the tested conditions. When in continuous flow in columns, the removal yield was similar for all of the rare earth elements tested. Lanthanum and cerium were the elements most easily removed by all tested sorbents when tes...
Nano-adsorbents for the Effective Removal of Heavy Metal Ions from Domestic and Industrial Wastewater: A Review of Current Scenario
Mishu Singh
In recent decades, there has been a significant increase in the amount of heavy metal ion pollutants in water. Given the high toxicity of heavy metal ions, their removal from contaminated water bodies has been a significant concern. Advanced nano-engineered technologies have created new avenues for the treatment of such metal ions. In order to extract the heavy metal ions found in wastewater, it has offered knowledgeable and reasonably priced solutions. Heavy metal ions found in municipal and industrial wastewater can be effectively removed by using nano-adsorbents, which have demonstrated a higher adsorption rate and a higher adsorption efficiency. These drugs are easily recovered from following treatment and have significantly improved operational conditions. By gathering all of the research papers on the synthesis and benefits of nano-adsorbents in the treatment of wastewater contaminated with heavy metal ions, the current review provides the references examination. The other Nano absorbents for scavenging metallic ions are also summarized. Many harmful metal ions can be effectively removed by these nanomaterials, indicating their great potential in this regard
