Bioaccumulation of toxic metals by fungi of the genus Aspergillus isolated from the contaminated area of Ostramo Lagoons

Abstract The study compares the ability to bioaccumulate toxic metal ions using microscopic filamentous fungi of the genus Aspergillus isolated from the anthropogenically contaminated site of the Ostramo Lagoons (Ostrava, Czech Republic). The experiment comprised six species of indigenous fungal isolates: A. niger, A. candidus, A. iizukae, A. westerdijkiae, A. ochraceus and A. clavatus. Nutrient liquid media enriched with Cu(II), Zn(II), Ni(II) and Cr(III) were individually inoculated with spores of these fungi. After thirty days of incubation, the content of metal ions in the dried fungal biomass and medium was measured by the AAS. It was found that the average bioaccumulation capacity of selected toxic metal within the tested strains decreases in the following order: A. ochraceus > A. candidus > A. clavatus > A. westerdijkiae > A. iizukae > A. niger. The highest bioaccumulation efficiency was achieved by the A. ochraceus strain which accumulated Cu(II) with an efficiency of 57.42 %, Zn(II) with 56.88 %, Cr(III) with 37.73 %. When comparing the ability of bioaccumulation of the toxic metals, the following was found: Zn(II) > Cu(II) > Cr(III) > Ni(II). Understanding of bioaccumulation processes that take place in fungal cells at the molecular level may lead to better strategies for the application of these interesting microorganisms in bioremediation processes.

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Metal Toxicity and Speciation: A Review

Current Medicinal Chemistry ◽

10.2174/0929867328666210324161205 ◽

2021 ◽

Vol 28 ◽

Author(s):

Massimiliano Peana ◽

Alessio Pelucelli ◽

Serenella Medici ◽

Rosita Cappai ◽

Valeria Marina Nurchi ◽

...

Keyword(s):

Metal Ions ◽

Toxic Metals ◽

Toxic Metal ◽

Cellular Damage ◽

Anthropogenic Sources ◽

Essential Metals ◽

Essential Metal ◽

Toxic Metal Ions ◽

Cellular Targets ◽

Hard Structures

Background : Essential metal ions play a specific and fundamental role in human metabolism. Their homeostasis is finely tuned and any concentration imbalance in form of deficiency or excess could lead to a progressive reduction and failure of normal biological function, to severe physiological and clinical outcomes till death. Conversely, non-essential metals are not necessary for life and only noxious effects could arise after their exposure. Large environmental amounts of such chemicals come from both natural and anthropogenic sources, with the latter being predominant because of human activities. The dissipation of toxic metals contaminates water, air, soil, and food, causing a series of chronic and acute syndromes. Objective : This review discusses the toxicity of non-essential metals considering their peculiar chemical characteristics such as different forms, hard-soft character, oxidation states, binding capabilities and solubility, which can influence their speciation in biological systems, and subsequently, the main cellular targets. Particular focus is given to selected toxic metals, major non-essential metals or semimetals related to toxicity such as mercury, lead, cadmium, chromium, nickel and arsenic. In addition, we provide indications on the possible treatments/interventions on metal poisoning based on chelation therapy. Conclusion: Toxic metal ions can exert their peculiar harmful effects in several ways. They strongly coordinate to important biological molecules on the basis of their chemical-physical characteristics (manly HSAB properties) or replace essential metal ions from their natural locations in proteins, enzymes or in hard structures such as bones or teeth. Metals with redox properties could be key inducers of reactive oxygen species, leading to oxidative stress and cellular damage. Therapeutic detoxification, through complexation of toxic metal ions by specific chelating agents, appears an efficacious clinical strategy mainly in acute cases of metal intoxication.

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Spatial distribution and risk assessment of toxic metals in agricultural soils from endemic nasopharyngeal carcinoma region in South China

Open Geosciences ◽

10.1515/geo-2020-0110 ◽

2020 ◽

Vol 12 (1) ◽

pp. 568-579

Author(s):

Liping Mo ◽

Yongzhang Zhou ◽

Gnanachandrasamy Gopalakrishnana ◽

Xingyuan Li

Keyword(s):

Nasopharyngeal Carcinoma ◽

South China ◽

Toxic Metals ◽

Agricultural Soils ◽

Hazard Index ◽

Toxic Metal ◽

Carcinogenic Risk ◽

Pollution Indices ◽

High Incidence ◽

Low Incidence

AbstractSihui city (South China) is much affected by nasopharyngeal carcinoma (NPC). To investigate the relationships between the toxic metals in soil and NPC incidence in Sihui, 119 surface soil samples were collected from agricultural fields and analyzed. The soil As–Cr contents in Longjiang (high-incidence area) are significantly lower than those in Weizheng and Jianglin (low-incidence areas), whereas the soil Pb content in Longjiang is significantly higher than that in Weizheng. The Nemerow pollution indices (PIN) of soils decrease in the order of Jianglin > Weizheng > Longjiang. The enrichment factor (EF) of Cd indicates that the Cd enrichment is contributed by human activities. Potential toxic metal-related ecological risk values decrease in the order of Jianglin > Weizheng > Longjiang. The mean hazard index (HI) value of Longjiang was lower than those of Weizheng and Jianglin. There are no adverse noncarcinogenic health effects of soil toxic metals to adults in the study areas. Carcinogenic risks of As and Cr via ingestion and dermal contact and total carcinogenic risk are within the warning range, from 10−6 to 10−4. Hence, we suggest that toxic metals in the soil may not be major geochemical carcinogenic factors of high NPC incidence in Sihui.

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Colorimetric sensing approaches based on silver nanoparticles aggregation for determination of toxic metal ions in water sample: a review

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2021.1873315 ◽

2021 ◽

pp. 1-16

Author(s):

Rajat Singh ◽

Rahul Mehra ◽

Ankita Walia ◽

Simmy Gupta ◽

Prince Chawla ◽

...

Keyword(s):

Silver Nanoparticles ◽

Metal Ions ◽

Water Sample ◽

Toxic Metal ◽

Colorimetric Sensing ◽

Toxic Metal Ions

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The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties

Journal of Materials Chemistry A ◽

10.1039/c9ta11800d ◽

2020 ◽

Vol 8 (4) ◽

pp. 1986-2000 ◽

Cited By ~ 3

Author(s):

Afaq Ahmad Khan ◽

Arif Chowdhury ◽

Sunita Kumari ◽

Sahid Hussain

Keyword(s):

Metal Ions ◽

Toxic Metal ◽

Adsorption Properties ◽

Organic Dye ◽

Soft Template ◽

Toxic Metal Ions ◽

Controlled Morphology

ZnIn2S4 nanostructures were fabricated with controlled morphology and utilized for the adsorption of an organic dye and toxic metal ions.

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Tuning the sensitivity towards mercury via cooperative binding to d-fructose: dual fluorescent chemosensor based on 1,8-naphthyridine-boronic acid derivative

RSC Advances ◽

10.1039/d1ra02122b ◽

2021 ◽

Vol 11 (24) ◽

pp. 14862-14870

Author(s):

Marina Rajadurai ◽

E. Ramanjaneya Reddy

Keyword(s):

Metal Ions ◽

Acid Derivative ◽

Boronic Acid ◽

Toxic Metal ◽

Fluorescent Chemosensor ◽

Cooperative Binding ◽

Toxic Metal Ions

This new dual d-fructose–mercury chemosensor is the first example of utilizing boronic acid–diol complexation for enhancement of the sensor's sensitivity towards toxic metal ions.

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DNA-functionalized photonic crystal microspheres for multiplex detection of toxic metal ions

Colloids and Surfaces B Biointerfaces ◽

10.1016/j.colsurfb.2017.03.009 ◽

2017 ◽

Vol 154 ◽

pp. 142-149 ◽

Cited By ~ 9

Author(s):

Zhengyu Yan ◽

Chunqing Tian ◽

Xincheng Qu ◽

Weiyang Shen ◽

Baofen Ye

Keyword(s):

Photonic Crystal ◽

Metal Ions ◽

Toxic Metal ◽

Multiplex Detection ◽

Toxic Metal Ions

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Cellulose Based Electrospun Nanofilters: Perspectives On Tannery Effluent Waste Water Treatment

10.21203/rs.3.rs-782503/v1 ◽

2021 ◽

Author(s):

Senthil Rethinam ◽

Sardar Batıkan Kavukcu ◽

Thiagarajan Hemalatha ◽

A.Wilson Aruni ◽

Aylin Sendemir

Keyword(s):

Metal Ions ◽

Waste Water Treatment ◽

Toxic Metal ◽

Poly Vinyl Alcohol ◽

Tannery Effluent ◽

Tea Leaves ◽

Leather Industry ◽

Elongation At Break ◽

Hazardous Metal ◽

Effluent Waste

Abstract Development of nanofilters with the capability to remove toxic metal ions from effluent wastewater will be of immense help to the leather industry. In this study, fibrous nanofilter (FNF) was prepared using micro cellulosic fiber (MCF) and tea leaves microparticles (TLM) blended in poly (vinyl) alcohol (PVA). FNF was analysed for its efficacy to remove hazardous metals from tannery effluent wastewater. The FNF had promising traits of tensile strength (19.24+0.05 Mpa), elongation at break (22.31+0.12 %), flexibility (10.88+0.05 %), water absorption (37.86+0.14 %) and desorption (32.54+0.33 %). The metal adsorption studies clearly reflected the removal of toxic Cr (VI) ions from the effluent water by FNF. The study establishes an economically feasible and highly efficient way to remove hazardous metal ions from effluent wastewater.

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Removal of Toxic Metal Ions from Solutions Using Industrial Solid Byproducts

Water Science & Technology ◽

10.2166/wst.1993.0209 ◽

1993 ◽

Vol 27 (10) ◽

pp. 83-93 ◽

Cited By ~ 35

Author(s):

A. I. Zouboulis ◽

K. A. Kydros ◽

K. A. Matis

Keyword(s):

Toxic Metals ◽

Toxic Metal ◽

Industrial Wastes ◽

Mineral Particles ◽

Solid Adsorbent ◽

Metals Removal ◽

Environmental Considerations ◽

Solid Liquid ◽

Solid Liquid Separation ◽

By Products

Nowadays the problem of industrial wastes handling and disposal is increasing continuously, as more strict environmental considerations have to be taken into account. In this paper, selected experimental results are presented from our current research in toxic metals removal (e.g. Cu, Pb, As), related to the applications of mineral particles as by-products (red mud, pyrite, dolomite, etc.) for the induced removal of toxic metals from aqueous solutions. These by-products, existing in finely divided form and considered rather as solid industrial wastes, have been used as a cheap solid adsorbent or substrate. Appropriate methods for the subsequent solid/liquid separation were examined, among them flotation. Different parameters were tested and high removals of toxic metals were achieved. In this way, a useful application may be realized for the waste mineral particles.

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