Chromium remediation and toxicity assessment of nano zerovalent iron against contaminated lake water sample (Puliyanthangal Lake, Tamilnadu, India)
TL;DR: In this article, the authors carried out a remediation test along with toxicity assessment in a water sample collected from the saturated zone of a historically hexavalent chromium (VI)-contaminated site known as a Puliyanthangal lake (Tamilnadu, India) using nanoscale zero-valent iron (nZVI).
About: This article is published in South African Journal of Chemical Engineering.The article was published on 2018-06-01 and is currently open access. It has received 11 citations till now. The article focuses on the topics: Zerovalent iron & Hexavalent chromium.
Citations
More filters
TL;DR: This work critically presents their advantages and disadvantages, suggesting a site-specific and accurate evaluation for choosing the best available recovering technology for chromium removal.
Abstract: Chromium is a potentially toxic metal occurring in water and groundwater as a result of natural and anthropogenic sources. Microbial interaction with mafic and ultramafic rocks together with geogenic processes release Cr (VI) in natural environment by chromite oxidation. Moreover, Cr (VI) pollution is largely related to several Cr (VI) industrial applications in the field of energy production, manufacturing of metals and chemicals, and subsequent waste and wastewater management. Chromium discharge in European Union (EU) waters is subjected to nationwide recommendations, which vary depending on the type of industry and receiving water body. Once in water, chromium mainly occurs in two oxidation states Cr (III) and Cr (VI) and related ion forms depending on pH values, redox potential, and presence of natural reducing agents. Public concerns with chromium are primarily related to hexavalent compounds owing to their toxic effects on humans, animals, plants, and microorganisms. Risks for human health range from skin irritation to DNA damages and cancer development, depending on dose, exposure level, and duration. Remediation strategies commonly used for Cr (VI) removal include physico-chemical and biological methods. This work critically presents their advantages and disadvantages, suggesting a site-specific and accurate evaluation for choosing the best available recovering technology.
194 citations
Cites background or methods from "Chromium remediation and toxicity a..."
...Moreover, the zero-valent iron (ZVI) and particularly the nanoscale zero-valent iron (nZVI) are well documented in the scientific literature as a readily available and low-cost reducing agent for Cr (VI) removal [111], although the ecotoxicological effects on native microorganisms are rarely considered [112]....
[...]
...To overcome the issue, in recent years, nZVI was applied using porous media, that is, bentonite and sepiolite as solid support [112,113]....
[...]
...Moreover, the zero‐valent iron (ZVI) and particularly the nanoscale zero‐valent iron (nZVI) are well documented in the scientific literature as a readily available and low‐cost reducing agent for Cr (VI) removal [111], although the ecotoxicological effects on native microorganisms are rarely considered [112]....
[...]
TL;DR: In this paper, a synoptic review on chromium occurrence, its toxicity, impacts on environments, health effects and also deals with the emerging techniques such as electrocoagulation, adsorption, biological treatment, membrane treatment, photocatalysis prospects and drawbacks in detail.
188 citations
TL;DR: This review summarizes the utilization of various Fe-based NPs such as nano zero-valent iron (NZVI), modified- NZVI, supported-NZVI, doped-NZ VI, and Fe oxides and hydroxides in remediating the HMs-polluted environment and proposes future recommendations for the utilization for these NPs.
97 citations
TL;DR: Based on the various studies the bioremediation of pollutants using biosynthetic nanoparticles is emerging as a very promising and sustainable method of environment cleanup.
Abstract: This century is struggling with the issue of environment friendly management of the pollutants which are contaminating the environment. One of an ecofriendly and economically feasible method is the bioremediation of pollutants using bio nanoparticles. Nanobioremediation is a highly studied and explored area of remediation of contaminants using nanotechnology. Nanoparticles used for bioremediation are biologically synthesized from plant extracts, fungi and bacteria. These biogenic nanoparticles when applied to environmental contaminants had shown very promising results. Based on the various studies the bioremediation of pollutants using biosynthetic nanoparticles is emerging as a very promising and sustainable method of environment cleanup. This review focuses on the synthesis of bio-nanoparticles and their use in cleaning the environment.
32 citations
TL;DR: This review aims to provide insights on absorption, metabolism, and distribution of nano-minerals in the body and potential applications and various aspects of using nano-trace minerals in different poultry species with potential effects on performance and health of birds are discussed.
Abstract: Nano-technology is an emerging technology with tremendous potential and diverse applications in human health, agriculture, and animal nutrition. It also offers potential advantages in supporting research in many areas of life sciences. Nano-technology has many vital biological applications as living systems depend on many nano-scale objects like proteins, DNA, and enzymes. Trace minerals are normally used in very minute quantity in animal nutrition but issues like lower bioavailability, antagonism, and higher excretion rates from body limit their efficiency. Nano-technology offers opportunity to mediate these issues as nano-particles possess different physical and chemical properties than other forms of minerals. Nano-particles possess higher physical activity and chemical neutrality. Bioavailability can be enhanced by increasing the surface area of respective minerals by making their nano-particles. Owing to potential advantages of nano-particles, interest in exploring their potential use and efficacy in animal production has increased significantly in this decade. Although limited literature is available regarding potential effects of nano-particles in poultry nutrition, still some convincing evidences have suggested the feeding of trace minerals (zinc, copper, silver, selenium, iron, chromium, and manganese) in the diets of broilers, layers, turkeys, quails, etc. Excellent antimicrobial activities of nano-particles of Ag, Cu, and Zn, against key poultry pathogens like Salmonella and Campylobacter, indicate their potential for effective use in poultry production. Recent studies have also demonstrated modulation of gut health by nano-particle through increasing abundance of beneficial microbes (Lactobacillus and Faecalibacterium) and production of short-chain fatty acids. This review aims to provide insights on absorption, metabolism, and distribution of nano-minerals in the body. Moreover, potential applications and various aspects of using nano-trace minerals in different poultry species with potential effects on performance and health of birds are discussed.
31 citations
References
More filters
TL;DR: A tetrazolium salt has been used to develop a quantitative colorimetric assay for mammalian cell survival and proliferation and is used to measure proliferative lymphokines, mitogen stimulations and complement-mediated lysis.
50,114 citations
2,083 citations
TL;DR: It is demonstrated that only ultrafine polystyrene particles induced a significant increase in cytosolic calcium ion concentration and experiments using dichlorofluorescin diacetate demonstrated greater oxidant activity of the ultrafine particles, which may explain their activity in these assays.
1,181 citations
TL;DR: This review describes the environmental implications of Cr(VI) presence in aqueous solutions, the chemical species that could be present and then the technologies available to efficiently reduce hexavalent chromium.
1,063 citations
Journal Article•
TL;DR: It is suggested that superoxide dismutase deficiency may be an unrecognized cause of Heinz body hemolytic anemia.
1,015 citations