scholarly journals Recent Progress in the Application of Hydroxyapatite for the Adsorption of Heavy Metals from Water Matrices

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6898
Author(s):  
Roxana Ioana Brazdis ◽  
Irina Fierascu ◽  
Sorin Marius Avramescu ◽  
Radu Claudiu Fierascu
Keyword(s):  
Heavy Metals ◽  
Recent Progress ◽  
Review Paper ◽  
Morphological Characteristics ◽  
Critical Issue ◽  
Synthesis Methods ◽  
Current Review ◽  
Removal Of Heavy Metals ◽  
Materials Used ◽  
Adsorbent Materials

Wastewater treatment remains a critical issue globally, despite various technological advancements and breakthroughs. The study of different materials and technologies gained new valences in the last years, in order to obtain cheap and efficient processes, to obtain a cleaner environment for future generations. In this context, the present review paper presents the new achievements in the materials domain with highlights on apatitic materials used for decontamination of water loaded with heavy metals. The main goal of this review is to present the adsorptive removal of heavy metals using hydroxyapatite-based adsorbents, offering a general overview regarding the recent progress in this particular area. Developing the current review, an attempt has been made to give appropriate recognition to the most recent data regarding the synthesis methods and targeted pollutants, including important information regarding the synthesis methods and precursors, morphological characteristics of the adsorbent materials and effectiveness of processes.

scholarly journals Various Absorbents and Parameters Affecting Removal of Water Hardness from Wastewater: Review

2020 ◽  
Vol 6 (3) ◽  
Author(s):  
Tamiru M ◽  
Bekele G
Keyword(s):  
Heavy Metals ◽  
Nanostructured Materials ◽  
Adsorption Process ◽  
Review Paper ◽  
Low Cost ◽  
Water Hardness ◽  
The World ◽  
Removal Of Heavy Metals ◽  
Different Sources

Discharges of heavy metals from different sources to the water lead to water hardness which is the major problem of the world due to their toxic and carcinogenic nature. Among several methods to eliminate heavy metals, absorption is the leading technique for the removal of heavy metals from wastewater because it is efficient, available, low-cost, and eco-friend. This review paper gives detail information about adsorbents on both conventional and nanostructured materials, either occur naturally or available commercially. The review also contains properties and parameters which affect the adsorption process with essential clarifications that are given by researchers.

scholarly journals Removal of Heavy Metals from Wastewaters: A Challenge from Current Treatment Methods to Nanotechnology Applications

Toxics ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 101
Author(s):  
Ruxandra Vidu ◽  
Ecaterina Matei ◽  
Andra Mihaela Predescu ◽  
Badriyah Alhalaili ◽  
Cristian Pantilimon ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Current Treatment ◽  
Constant Attention ◽  
Metals Removal ◽  
Removal Of Heavy Metals ◽  
Alternative Water ◽  
Materials Used ◽  
Water Treatments

Removing heavy metals from wastewaters is a challenging process that requires constant attention and monitoring, as heavy metals are major wastewater pollutants that are not biodegradable and thus accumulate in the ecosystem. In addition, the persistent nature, toxicity and accumulation of heavy metal ions in the human body have become the driving force for searching new and more efficient water treatment technologies to reduce the concentration of heavy metal in waters. Because the conventional techniques will not be able to keep up with the growing demand for lower heavy metals levels in drinking water and wastewaters, it is becoming increasingly challenging to implement technologically advanced alternative water treatments. Nanotechnology offers a number of advantages compared to other methods. Nanomaterials are more efficient in terms of cost and volume, and many process mechanisms are better and faster at nanoscale. Although nanomaterials have already proved themselves in water technology, there are specific challenges related to their stability, toxicity and recovery, which led to innovations to counteract them. Taking into account the multidisciplinary research of water treatment for the removal of heavy metals, the present review provides an updated report on the main technologies and materials used for the removal of heavy metals with an emphasis on nanoscale materials and processes involved in the heavy metals removal and detection.

scholarly journals Efficient Removal of Heavy Metals from Aqueous Solutions Using a Bionanocomposite of Eggshell/Ag-Fe

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 727
Author(s):  
Verónica M. Alamillo-López ◽  
Víctor Sánchez-Mendieta ◽  
Oscar F. Olea-Mejía ◽  
María G. González-Pedroza ◽  
Raúl A. Morales-Luckie
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Natural Material ◽  
Efficient Removal ◽  
Fe Nanoparticles ◽  
Adsorption Data ◽  
Removal Of Heavy Metals ◽  
Heavy Metals Ions ◽  
Efficient Adsorbent ◽  
Adsorbent Materials

Eggshell and an easily synthesized bionanocomposite of eggshell with Ag-Fe nanoparticles demonstrated to be efficient adsorbent materials for the removal of lead, arsenic, and mercury from water. The natural material and the bionanocomposite were characterized by TEM and XRD. Ag-Fe nanoparticles vary from 1 to 100 nm in size. Equilibrium times of the adsorption systems were achieved between 4 and 8 h. The experimental adsorption data fitted the pseudo-second and Elovich models; therefore, the adsorption of heavy metals ions took place mainly by a chemical process. The adsorption capacity of eggshell in mg/g was 7.01 for As5+, 3.90 for Pb2+, and 1.51 for Hg2+, while the nanocomposite adsorption capacity was 17.7 for As5+, 27.8 for Pb2+ and 15.88 for Hg2+.

A Review of Heterogeneous Catalysts Preparation Methods

2021 ◽  
Vol 18 ◽  
Author(s):  
Israf Ud Din ◽  
Qazi Nasir ◽  
Mustapha D. Garba ◽  
Muhammad Usman ◽  
Abdulrahman I. Alharthi ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Industrial Revolution ◽  
Review Paper ◽  
Supported Catalysts ◽  
Reaction Rates ◽  
Production Costs ◽  
Synthesis Methods ◽  
Preparation Methods ◽  
Current Review ◽  
Catalysts Preparation

: Catalysts contribute significantly to the industrial revolution in terms of reaction rates and reduction in production costs. An extensive research has been documented in various industrial catalysis in the last few decades. The performance of catalysts has been influenced by many parameters including synthesis methods. The current work overviews the most common methods applied in the synthesis of supported catalysts. This review presents the detailed background, principle and mechanism of each preparation method. The advantages and limitations of each method have also been elaborated in details. In addition, the applications of each method in terms of catalysts synthesis have been documented in the current review paper.

Potential Uses of Vinegar as a Medicine and Related in vivo Mechanisms

2016 ◽  
Vol 86 (3-4) ◽  
pp. 127-151 ◽  
Author(s):  
Zeshan Ali ◽  
Zhenbin Wang ◽  
Rai Muhammad Amir ◽  
Shoaib Younas ◽  
Asif Wali ◽  
...  
Keyword(s):  
Chemical Structure ◽  
Review Paper ◽  
Heart Diseases ◽  
Folk Medicine ◽  
Active Role ◽  
Current Review ◽  
Different Types ◽  
Positive Effect

While the use of vinegar to fi ght against infections and other crucial conditions dates back to Hippocrates, recent research has found that vinegar consumption has a positive effect on biomarkers for diabetes, cancer, and heart diseases. Different types of vinegar have been used in the world during different time periods. Vinegar is produced by a fermentation process. Foods with a high content of carbohydrates are a good source of vinegar. Review of the results of different studies performed on vinegar components reveals that the daily use of these components has a healthy impact on the physiological and chemical structure of the human body. During the era of Hippocrates, people used vinegar as a medicine to treat wounds, which means that vinegar is one of the ancient foods used as folk medicine. The purpose of the current review paper is to provide a detailed summary of the outcome of previous studies emphasizing the role of vinegar in treatment of different diseases both in acute and chronic conditions, its in vivo mechanism and the active role of different bacteria.

Biosorption: An Eco-Friendly Technique for the Removal of Heavy Metals

2011 ◽  
Vol 2 (3) ◽  
pp. 1-8 ◽  
Author(s):  
Sasmita Sabat ◽  
◽  
R V Kavitha R V Kavitha ◽  
Shantha S L Shantha S L ◽  
Gopika Nair ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Removal Of Heavy Metals

Study of the Cu(II) removal from aqueous solutions by adsorption on titania

2013 ◽  
Vol 12 (3) ◽  
pp. 239-247
Keyword(s):  
Heavy Metals ◽  
Ionic Strength ◽  
Toxic Metals ◽  
Low Cost ◽  
Lateral Interaction ◽  
Tio2 Surface ◽  
High Toxicity ◽  
Removal Of Heavy Metals ◽  
Solution Parameters ◽  
Kinetics Of

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.

Synergistic Effect of Rhamnolipid and Saponin Biosurfactants on Removal of Heavy Metals from Oil Contaminated Soils

2020 ◽  
Vol 57 (2) ◽  
pp. 109-114
Author(s):  
Amirhossein Dolatzadeh khiyavi ◽  
Reza Hajimohammadi ◽  
Hossein Amani ◽  
Hadi Soltani
Keyword(s):  
Heavy Metals ◽  
Synergistic Effect ◽  
Contaminated Soils ◽  
Removal Of Heavy Metals
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