A Luminescent Cationic MOF for Bimodal Recognition of Chromium and Arsenic based Oxo-anions in Water

2021 ◽  
Author(s):  
Subhajit Dutta ◽  
Sumanta Let ◽  
Mandar M Shirolkar ◽  
Aamod V. Desai ◽  
Partha Samanta ◽  
...  
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Environmental Issue ◽  
Oxo Anions

Water pollution because of heavy metals and their toxic oxo-anionic derivatives such as CrO42−, Cr2O72-, HAsO42-, HAsO32- has become one of the most critical environmental issue. To address this, herein...

scholarly journals A New Ex Vivo Model to Evaluate the Hair Protective Effect of a Biomimetic Exopolysaccharide against Water Pollution

Cosmetics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 78
Author(s):  
Claire Tubia ◽  
Alfonso Fernández-Botello ◽  
Jan Dupont ◽  
Eni Gómez ◽  
Jérôme Desroches ◽  
...  
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Adverse Effects ◽  
Inductively Coupled Plasma ◽  
Ex Vivo ◽  
Polluted Water ◽  
Ex Vivo Model ◽  
Fiber Damage ◽  
The Impact

As an external appendage, hair is exposed to multiple stresses of different origins such as particles and gases in air, or heavy metals and chemicals in water. So far, little research has addressed the impact of water pollution on hair. The present study describes a new ex vivo model that allowed us to document the adverse effects of water pollutants on the structure of hair proteins, as well as the protective potential of active cosmetic ingredients derived from a biomimetic exopolysaccharide (EPS). The impact of water pollution was evaluated on hair from a Caucasian donor repeatedly immersed in heavy metal-containing water. Heavy metal retention in and on hair was then quantified using Inductively Coupled Plasma Spectrometry (ICP/MS). The adverse effects of heavy metals on the internal structure of hair and its prevention by the EPS were assessed through measurement of keratin birefringence. Notably, the method allows the monitoring of the organization of keratin fibers and therefore the initial change on it in order to modulate the global damage in the hair. Results revealed an increasing amount of lead, cadmium and copper, following multiple exposures to polluted water. In parallel, the structure of keratin was also altered with exposures. However, heavy metal-induced keratin fiber damage could be prevented in the presence of the tested EPS, avoiding more drastic hair problems, such as lack of shine, or decrease in strength, due to damage accumulation.

scholarly journals Research on Progress in Combined Remediation Technologies of Heavy Metal Polluted Sediment

2019 ◽  
Vol 16 (24) ◽  
pp. 5098 ◽  
Author(s):  
Min Zhang ◽  
Xiangchun Wang ◽  
Long Yang ◽  
Yangyang Chu
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
River Sediments ◽  
Aquatic Organisms ◽  
Environmental Issue ◽  
Research Progress ◽  
Contaminated Sediment ◽  
Physical Chemical ◽  
Polluted Sediments ◽  
Great Harm

Heavy metals contaminated sediment has become a worldwide environmental issue due to its great harm to human and aquatic organisms. Thus, economical, effective, and environmentally-friendly remediation technologies are urgently needed. Among which, combined remediation technologies have attracted widespread attention for their unique advantages. This paper introduces combined remediation technologies based on physical-, chemical-, and bio-remediation of heavy metal polluted sediments. Firstly, the research progress in physical-chemical, bio-chemical, and inter-organismal (including plants, animals, microorganisms) remediation of heavy metal polluted sediments are summarized. Additionally, the paper analyzes the problems of the process of combined remediation of heavy metals in river sediments and outlooks the future development trends of remediation technologies. Overall, this review provides useful technology references for the control and treatment of heavy metal pollution in river sediments.

scholarly journals Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?

2009 ◽  
Vol 2 (3) ◽  
pp. 177-183 ◽  
Author(s):  
Jana Kovářová ◽  
Zdeňka Svobodová
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Molecular Mass ◽  
Aquatic Ecosystem ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Trophic Levels ◽  
Aquatic Animals ◽  
Thiol Compounds ◽  
Potential Use

Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?Due to anthropogenic activities, heavy metals still represent a threat for various trophic levels. If aquatic animals are exposed to heavy metals we can obviously observe considerable toxicity. It is well known that an organism affected by cadmium (Cd) synthesize low molecular mass thiol compounds rich in cysteine (Cys), such as metallothioneins (MT) and glutathione (GSH/GSSG). The aim of this study was to summarize the effect of Cd on level of thiol compounds in aquatic organisms, and evaluate that the concentrations of thiol compounds are effective indicators of Cd water pollution and explain their potential use in biomonitoring applications.

scholarly journals Pengaruh Toksisitas Timbal Asetat Pb(CH3COO) Dan Kepadatan Terhadap Perubahan Warna Dan Persentase Anakan Jantan Kutu Air Daphnia sp.

2018 ◽  
Vol 1 (1) ◽  
pp. 68
Author(s):  
Ariestyanto Eka Putera ◽  
Andi Rahmad Rahim ◽  
Firma Fika Rahmawati
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Research Design ◽  
Adult Female ◽  
Main Parameter ◽  
Color Change

Pb (CH3COO) was a metal that could accumulated in organisms tissue. Pb contents in organismstissue increased by increasing of Pb (CH3COO) concentration in the water and the durationorganisms that live in water pollution by Pb (CH3COO). It is caused organisms did not regulatedby Pb (CH3COO) one that turns in at organisms body. Daphnia sp.are sensitive to the chemicalin the waters ecology and has an important role in the ecology of freshwater as the first of trophiclevel in the waters ecology. The objective of this study was to obtain information about effect theconcentration of heavy metals Pb (CH3COO) in differences densities of Daphnia sp.to colorchanges and percentage of male larvae Daphnia sp. This research design uses factorial cmpleterandoms design. The main parameter in this research is color changing and male larvae on theDaphnia sp. While supporting parameters in this research is water quality (temperature, pH,amonia and DO). The result of research indicates that the heavy metal Pb (CH3COO) withdifferent concentration to the adult female Daphnia sp. showed significantly difference (p<0,05)of the Daphnia sp. color change, the highest density of Daphnia sp. (400 Daphnias) with heavymetal concentration 3.16 mg/l.

scholarly journals Preparation and characterization of bioadsorbent beads for removing selected heavy metal ions from wastewater

2018 ◽  
Author(s):  
◽  
Suhaib S. Salih
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Metal Ions ◽  
Diatomaceous Earth ◽  
Industrial Society ◽  
Time Range ◽  
Order Kinetic ◽  
Nickel Ion ◽  
X Ray ◽  
Adsorption Capacities

Rapid industrialization is one of the major threats to water pollution worldwide, as discharge effluents contain large amounts of toxic metal ions. Heavy metals are highly toxic to the ecosystem and human even at very low concentrations. We focused on easily available, green and eco-friendly with low operational cost materials to remove heavy metals from industrial wastewater. Chitosan is considered an alternative and sustainable adsorbent due to its highly efficient adsorption capacities for heavy metals. In this particular study, chitosan was successfully modified by using diatomaceous earth and then fabricated as spherical beads using the drop-wise method. Pristine chitosan (CS) beads and chitosan coated diatomaceous earth (CSDE) beads were used to remove zinc, chromium, lead, and nickel ions from aqueous solutions in batch and continuous adsorption processes. The prepared adsorbents were characterized by using scanning electron microscopy (SEM) B Brunauer-Emmett-Teller (BET), Fourier-transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and zeta potential. The results showed that the prepared adsorbents were porous in nature and the total surface area were increased from 1.9 m2/g for pristine chitosan to 14.4 m2/g for chitosan coated diatomaceous earth. The performance of prepared adsorbents was investigated at different temperatures, initial pH of the solution, contact times, initial metal concentrations. The pseudo-second-order kinetic model is more likely to predict the kinetic behavior of the metal ions adsorption process for the whole used contact time range, and the adsorption isotherm data of CS and CSDE beads were well fitted to Langmuir model. The maximal adsorption capacities of prepared CSDE beads were found to be pH dependent as follows: - Zinc ion - 127.4 mg/g at initial Zn(II) concentration 500 mg/L and pH 6. - Chromium ion - 84.23 mg/g at initial Cr(VI) concentration 1000 mg/L and pH 3. - Lead ion - 175.22 mg/g at initial Pb(II) concentration 400 mg/L and pH 7. - Nickel ion - 149.64 mg/g at initial Ni(II) concentration 400 mg/L and pH 6. Successful desorption and regeneration of prepared adsorbents were achieved (with common chemicals) and possessed excellent reusability (up to 10 cycles without a significant loss in adsorption capacity). The common anions and cations coexisting ions have insignificant impact on the removal capacity of prepared adsorbents. Overall, these results suggest that the environmentally friendly materials might be recognized as effective adsorbent and sustainable means for the separation of heavy metals from wastewater streams. That will lead to a new solution to water pollution required in the modern industrial society.

scholarly journals Biodiversity of zoosporic fungi in polluted water drainages across Niles’Delta region, Lower Egipt

2013 ◽  
Vol 42 (1) ◽  
pp. 99-111 ◽  
Author(s):  
Esam H. Ali
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Species Diversity ◽  
Water Samples ◽  
Organic Matter Content ◽  
Fungal Species ◽  
Culture Technique ◽  
Polluted Water ◽  
The Family ◽  
Zoosporic Fungi

Thirty-four identified in addition to five unidentified species appertaining to ten genera of zoosporic fungi were identified and isolated from eighty four polluted water samples, which were randomly collected from different polluted sites of the water drainages along the Niles Delta in Lower Egypt. Baiting sesame seeds culture technique was employed at 20±2º C for the recovery of zoosporic fungi. The genera; <em>Pythium</em> and <em>Saprolegnia</em> (8 and 7 zoosporic fungal species, respectively) showed the broadest spectra of species diversity whereas <em>Aqualinderella</em> was only represented by one species (<em>A. fermentans</em>). <em>Saprolegnia delica</em> and <em>Dictyuchus carpophorus</em> (the greatest fungal populations) were the most dominant isolated zoosporic fungal species where they were highly occurred especially at the hyper-polluted waters with the heavy metals. These two species could be considered as indicators for the response of the structure and function of microbial communities for water pollution. Several zoosporic fungal species were rarely encountered. Both <em>Aqualinderella fermentans</em> and <em>Pythium rostratum</em> were recovered in moderate frequency of occurrence. Water samples which had high concentrations in heavy metals were the poorest in the species diversity of zoosporic fungi. Despite that, fungal species belonging to the family <em>Saprolegniaceae</em> flourished in hyper polluted water samples whilst those belonging to the family <em>Pythiaceae</em> predominated in more diluted water samples. Also, the prevalent species; <em>S. delica</em> and <em>D. carpophorus</em> were not affected by heavy metals concentrations being as indicators for water pollution with the heavy metals. pH values of the polluted water samples had no influence on the occurrence of zoosporic fungi. Water samples characterized by high organic matter content and low total soluble salts were the richest in zoosporic fungal species.

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