Application of Functionalized Nanomaterials as Effective Adsorbents for the Removal of Heavy Metals from Wastewater: A Review

2020 ◽  
Vol 17 (1) ◽  
pp. 4-22
Author(s):  
Saifeldin M. Siddeeg ◽  
Mohamed A. Tahoon ◽  
Norah S. Alsaiari ◽  
Muhamad Shabbir ◽  
Faouzi B. Rebah
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Engineered Nanomaterials ◽  
Complete Analysis ◽  
Toxic Heavy Metals ◽  
Metals Removal ◽  
Functionalized Nanomaterials ◽  
Metal Selectivity ◽  
Removal Of Heavy Metals

Background: Nanomaterials offer promising remediation techniques for water containing toxic pollutants especially heavy metals. Method: A complete analysis of the application of nano-adsorbents for heavy metals removal from water has been reviewed. The effect of their functionalization on the adsorption capacity, the reusability, and the surface area has also been discussed. Result: In particular, the focus was on the applications of graphene oxide, carbon, silica, titanium dioxide, and iron oxide for water treatment. Additionally, the effect of functional groups on heavy metal selectivity has been discussed as well. Conclusion: This article will provide environmental engineers and academicians with information related to the latest engineered nanomaterials employed for the treatment of wastewater containing toxic heavy metals.

scholarly journals Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

2021 ◽  
Vol 8 (10) ◽  
Author(s):  
Michael B. Mensah ◽  
David J. Lewis ◽  
Nathaniel O. Boadi ◽  
Johannes A. M. Awudza
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Environmental Remediation ◽  
Synthesis Method ◽  
Inorganic Nanoparticles ◽  
Critical Parameters ◽  
Toxic Heavy Metals ◽  
Metals Removal ◽  
Removal Of Heavy Metals ◽  
Inorganic Nanomaterials

Contamination of water and soil with toxic heavy metals is a major threat to human health. Although extensive work has been performed on reporting heavy metal pollutions globally, there are limited review articles on addressing this pernicious phenomenon. This paper reviews inorganic nanoparticles and provides a framework for their qualities required as good nanoadsorbents for efficient removal of heavy metals from water. Different inorganic nanoparticles including metals, metal oxides and metal sulfides nanoparticles have been applied as nanoadsorbents to successfully treat water with high contaminations of heavy metals at concentrations greater than 100 mg l −1 , achieving high adsorption capacities up to 3449 mg g −1 . It has been identified that the synthesis method, selectivity, stability, regeneration and reusability, and adsorbent separation from solution are critical parameters in deciding on the quality of inorganic nanoadsorbents. Surface functionalized nanoadsorbents were found to possess high selectivity and capacity for heavy metals removal from water even at a very low adsorbent dosage of less than 2 g l −1 , which makes them better than conventional adsorbents in environmental remediation.

scholarly journals Heavy Metals Removal from Water by Efficient Adsorbents

Water ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 2659
Author(s):  
Muhammad Zaim Anaqi Zaimee ◽  
Mohd Sani Sarjadi ◽  
Md Lutfor Rahman
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Adsorption Process ◽  
Natural Occurrence ◽  
Toxic Heavy Metals ◽  
Major Purpose ◽  
Treatment Methods ◽  
Metals Removal ◽  
Harmful Effects

Natural occurrence and anthropogenic practices contribute to the release of pollutants, specifically heavy metals, in water over the years. Therefore, this leads to a demand of proper water treatment to minimize the harmful effects of the toxic heavy metals in water, so that a supply of clean water can be distributed into the environment or household. This review highlights several water treatment methods that can be used in removing heavy metal from water. Among various treatment methods, the adsorption process is considered as one of the highly effective treatments of heavy metals and the functionalization of adsorbents can fully enhance the adsorption process. Therefore, four classes of adsorbent sources are highlighted: polymeric, natural mineral, industrial by-product, and carbon nanomaterial adsorbent. The major purpose of this review is to gather up-to-date information on research and development on various adsorbents in the treatment of heavy metal from water by emphasizing the adsorption capability, effect of pH, isotherm and kinetic model, removal efficiency and the contact of time of every adsorbent.

scholarly journals Heavy metals removal by EDTA-functionalized chitosan graphene oxide nanocomposites

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9764-9771 ◽  
Author(s):  
Asif Shahzad ◽  
Waheed Miran ◽  
Kashif Rasool ◽  
Mohsin Nawaz ◽  
Jiseon Jang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Two Dimensional ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Two Dimensional Materials

Graphene-based two-dimensional materials have been explored in a variety of applications, including the treatment of heavy-metal-rich water/wastewater.

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 Phytoremediation technology for removal of heavy metals: A brief review

2020 ◽  
pp. 25-33
Author(s):  
Geetanjali Singh ◽  
Ram Singh
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Crop Yields ◽  
Animal Health ◽  
Pollution Abatement ◽  
Environmental Pollutants ◽  
Heavy Metal Accumulation ◽  
Agricultural Fields ◽  
Toxic Heavy Metals ◽  
Removal Of Heavy Metals

Heavy metals, when exceeds the permissible limits, regarded as environmental pollutants. The agricultural fields, along with countryside areas are the most affected areas due to heavy metal contaminants affecting the crop yields. When these heavy metals find their way into the food chain possess a serious threat to plant and animal health. The industrial discharge, mining waste, chemical fertilizer industries are some of the main sources of heavy metal accumulation. The removal or reduction of these heavy metals from the agricultural fields are the unceasing requirements. One of the important and easy methods is removal or reduction with the help of plants which is known as phytoremediation, and it takes advantage of the remarkable ability of plants to concentrate elements and compound from the environment. This technology is immerging as a cost-effective way to address high cost involved in pollution abatement technologies. Toxic heavy metals and organic pollutants are the major targets for phytoremediation. This review article discusses the state of phytoremediation technology for the removal of heavy metals mainly from the soil.

Self-assembly of a graphene oxide/MnFe2O4 motor by coupling shear force with capillarity for removal of toxic heavy metals

2018 ◽  
Vol 6 (42) ◽  
pp. 20861-20868 ◽  
Author(s):  
Xiyue Peng ◽  
Feng Gao ◽  
Jiaxin Zhao ◽  
Jielan Li ◽  
Jiangying Qu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Self Assembly ◽  
Shear Force ◽  
Room Temperature ◽  
Toxic Heavy Metals ◽  
3D Graphene ◽  
Removal Of Heavy Metals

A 3D graphene oxide/MnFe2O4 motor is constructed via coupling shear force with capillarity at room temperature for removal of heavy metals.

ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

1970 ◽  
pp. 07-10
Author(s):  
MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Concentration ◽  
Coconut Water ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Toxic Heavy Metal ◽  
Low Concentration ◽  
Wet Ashing ◽  
Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples. 

Applications of Bentonite to Soil Decontamination

2018 ◽  
Vol 69 (7) ◽  
pp. 1695-1698
Author(s):  
Marin Rusanescu ◽  
Carmen Otilia Rusanescu ◽  
Gheorghe Voicu ◽  
Mihaela Begea
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Laboratory Experiments ◽  
Experimental Studies ◽  
Heavy Metal Concentration ◽  
Polluted Soil ◽  
Raw Material ◽  
Soil Decontamination ◽  
Metal Retention ◽  
Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

Metals Removal and Recovery by Arthrobacter sp. Biomass

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2149-2152 ◽  
Author(s):  
A. Grappelli ◽  
L. Campanella ◽  
E. Cardarelli ◽  
F. Mazzei ◽  
M. Cordatore ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Industrial Wastes ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Real Possibility ◽  
Metals Removal ◽  
Metal Capture ◽  
Accumulation Of Metals ◽  
Removal And Recovery

Experiments on the real possibility of employing microorganisms to capture inorganic polluting substances, mainly heavy metals from urban and industrial wastes, are running using bacteria biomass. Many strains of Arthrobacter spp., gram-negative bacteria, diffused in the soil also inacondition of environmental stresses, have been proved to be particulary effective in heavy metal capture (Cd, Cr, Pb, Cu, Zn). The active and passive processes in accumulation of metals by bacteria were studied. Our experiments have been done on fluid biomass and on a membrane both for practical use and for an easy recovery.

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