Heavy Metal Coprecipitation with Hydrozincite [Zn5(CO3)2(OH)6] from Mine Waters Caused by Photosynthetic Microorganisms

ABSTRACT An iron-poor stream of nearly neutral pH polluted by mine tailings has been investigated for a natural phenomenon responsible for the polishing of heavy metals in mine wastewaters. A white mineralized mat, which was determined to be hydrozincite [Zn5(CO3)2(OH)6] by X-ray diffraction analysis, was observed in the stream sediments mainly in spring. The precipitate shows a total organic matter residue of 10% dry weight and contains high concentrations of Pb, Cd, Ni, Cu, and other metals. Scanning electron microscopy analysis suggests that hydrozincite is mainly of biological origin. Dormant photosynthetic microorganisms have been retrieved from 1-year-old dry hydrozincite. The autofluorescent microorganisms were imaged by a scanning confocal laser microscope. A photosynthetic filamentous bacterium, classified asScytonema sp. strain ING-1, was found associated with microalga Chlorella sp. strain SA1. This microbial community is responsible for the natural polishing of heavy metals in the water stream by coprecipitation with hydrozincite.

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Study of Contamination of Some Plants With Some Heavy Metals and Study The Presence of Cyanide in Plants in The City of Mosul

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/910/1/012114 ◽

2021 ◽

Vol 910 (1) ◽

pp. 012114

Author(s):

Mishaal Ali Mohammed

Keyword(s):

Heavy Metals ◽

Medicinal Plants ◽

Copper Concentration ◽

Iron Concentration ◽

Dry Weight ◽

Iron And Zinc ◽

High Concentrations ◽

Castor Seeds ◽

The City ◽

Apple Seeds

Abstract The research included a study on the presence of some heavy metals, including copper, iron and zinc in some medicinal plants circulating in the city of Mosul, as well as the study of the presence of cyanide in some other plants, when measuring the concentration of iron in saffron was less concentrated among plants of 0.797 mg/kg, followed by anise 7.3417 mg/kg, followed by mint 10.87 mg/kg. Kg and high concentrations appeared in the coriander plant, where the iron concentration was 486.6 mg/kg, ginger bread 396.49 mg/kg and corn 200.1 mg/kg and Marjoram 154.2 mg/kg, either Measuring the concentration of potters in medicinal plants in saffron plant was the lowest concentration of all plants used in the study and was 0.304 mg/kg followed by anise 7.8 mg/kg, followed by oranges 17.58 mg/kg, and high concentrations of coriander 179.2 mg/kg, ginger 111.3 mg/kg, while measuring of the concentration of copper in the medicinal plants used in the study the ratio of copper in saffron was low and amounted to 0.377 mg/kg (Dry weight), the highest concentration of copper was in the coriander plant, which was 120.922 mg/kg, ginger copper concentration was 50.78 mg/kg, and for the rest of the plants the concentration of copper ranged from (2.93 to 36.1) 22 mg/kg), while when measuring the iron ratio in the medicinal plants used in the study, and in a study The concentration of cyanide in plants (diphtheloide, apple seeds, perfalathseeds, henna seeds, castor seeds) by Spectrophotometer has been obtained different cyanide concentrations in these plants in the diphtherty the highest ratio of cyanide is 71.4 micrograms/30g (dry weight) followed by castor seeds 64.05 micrograms/30g, followed by henna seeds 31.36 mcg/30g, while in apple seeds the concentration of cyanide was 29.6 μg/30g and orange seeds 10.95 mcg/30g.

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Potential Contribution of Nutrients and Polycyclic Aromatic Hydrocarbons from the Creeks of Cootes Paradise Marsh

Water Quality Research Journal ◽

10.2166/wqrj.1996.028 ◽

1996 ◽

Vol 31 (3) ◽

pp. 485-504 ◽

Cited By ~ 6

Author(s):

Patricia Chow-Fraser ◽

Barb Crosbie ◽

Douglas Bryant ◽

Brian McCarry

Keyword(s):

Aromatic Hydrocarbons ◽

Laboratory Experiments ◽

Dry Weight ◽

Common Source ◽

Potential Contribution ◽

Nitrogen And Phosphorus ◽

Engine Combustion ◽

Polycyclic Aromatic ◽

High Concentrations ◽

Derivatives Of

Abstract During the summer of 1994, we compared the physical and nutrient characteristics of the three main tributaries of Cootes Paradise: Spencer, Chedoke and Borer’s creeks. On all sampling occasions, concentrations of CHL α and nutrients were always lowest in Borer’s Creek and highest in Chedoke Creek. There were generally 10-fold higher CHL α concentrations and 2 to 10 times higher levels of nitrogen and phosphorus in Chedoke Creek compared with Spencer Creek. Despite this, the light environment did not differ significantly between Spencer and Chedoke creeks because the low algal biomass in Spencer Creek was balanced by a relatively high loading of inorganic sediments from the watershed. Laboratory experiments indicated that sediments from Chedoke Creek released up to 10 µg/g of soluble phosphorus per gram (dry weight) of sediment, compared with only 2 µg/g from Spencer Creek. By contrast, sediment samples from Spencer Creek contained levels of polycyclic aromatic hydrocarbon that were as high as or higher than those from Chedoke Creek, and much higher than those found in Borer’s Creek. The distribution of normalized PAH concentrations suggests a common source of PAHs in all three tributaries, most likely automobile exhaust, since there were high concentrations of fluoranthene and pyrene, both of which are derivatives of engine combustion.

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Innovative Ultrasound-Assisted Approaches towards Reduction of Heavy Metals and Iodine in Macroalgal Biomass

Foods ◽

10.3390/foods10030649 ◽

2021 ◽

Vol 10 (3) ◽

pp. 649

Author(s):

Estefanía Noriega-Fernández ◽

Izumi Sone ◽

Leire Astráin-Redín ◽

Leena Prabhu ◽

Morten Sivertsvik ◽

...

Keyword(s):

Heavy Metals ◽

Dry Weight ◽

The Other ◽

Laminaria Hyperborea ◽

Other Hand ◽

Macroalgal Biomass ◽

Ultrasound Assisted ◽

I 31

The aim of this work was to evaluate the potential of ultrasound (US), alone or in combination with mild heating and/or EDTA towards reduction of As, Cd, I, and Hg content of Laminaria hyperborea. Concentrations of As, Cd, I, and Hg of 56.29, 0.596, 7340, and <0.01 mg kg−1 of dry weight, respectively, were found in L. hyperborea blades. Treatment with US at 50 °C increased approx. 2-fold the amount of As released, although did not affect significantly the content of Cd or I, as compared to control (no US) samples. Reducing the temperature to 8 °C significantly decreased the effect of US, but heating at 80 °C did not cause a significant effect as compared to treatments at 50 °C. On the other hand, treatment with 0.1 N EDTA at 50 °C enhanced the percentage of Cd released by approximately 7-fold, regardless of sonication. In the present work, the combination of US and EDTA at 50 °C for 5 min led to a significant reduction of the As (32%), Cd (52%) and I (31%) content in L. hyperborea, thus improving the product’s safety for consumers.

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Contamination of Heavy Metals, Polychlorinated Dibenzo-p-Dioxins/Furans and Dioxin-Like Polychlorinated Biphenyls in Wharf Roach Ligia spp. In Japanese Intertidal and Supratidal Zones

Applied Sciences ◽

10.3390/app11041856 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1856

Author(s):

Masato Honda ◽

Xuchun Qiu ◽

Suzanne Lydia Undap ◽

Takeshi Kimura ◽

Tsuguhide Hori ◽

...

Keyword(s):

Heavy Metals ◽

Polychlorinated Biphenyls ◽

Limit Of Detection ◽

Environmental Pollutants ◽

Dry Weight ◽

Polychlorinated Dibenzofurans ◽

Environmental Indicator ◽

Pollution Levels ◽

Copper Zinc ◽

Total Concentrations

We investigated the pollution levels of 6 heavy metals and 29 dioxins (polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (DL-PCBs)) in intertidal and supratidal zones by using wharf roaches (Ligia spp.) collected from 12 sampling sites on the coast of Northeast Japan from November 2011 to June 2012. The total concentrations of heavy metals ranged from 177 to 377 µg/g-dry weight (dw), and the predominant metals were copper, zinc, and aluminum. The order of the detected level of heavy metals was zinc > aluminum > copper > cadmium > lead > chromium, and this trend was similar to a previous report. The total toxic equivalent (TEQ) value of the PCDD/Fs ranged from less than the limit of detection (<LOD) to 2.33 pg-TEQ/g-dw, and the predominant congener was octachlorodibenzodioxin (<LOD to 110 pg/g-dw). Compared with PCDD/Fs, DL-PCBs were detected at a predominantly higher level (total TEQ value: 0.64–27.79 pg-TEQ/g-dw). Detected levels of dioxins, especially DL-PCBs in the wharf roach, were like those in the bivalves. These results indicate that the wharf roach could reflect heavy metals and dioxin pollution in the supratidal zones and is a suitable environmental indicator for these environmental pollutants. This is the first study to investigate heavy metals, PCDD/Fs, and DL-PCBs pollution in coastal isopods in Japan.

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Spatial Variation of Water Chemistry in Aries River Catchment Western Romania

Applied Sciences ◽

10.3390/app11146592 ◽

2021 ◽

Vol 11 (14) ◽

pp. 6592

Author(s):

Ana Moldovan ◽

Maria-Alexandra Hoaghia ◽

Anamaria Iulia Török ◽

Marius Roman ◽

Ionut Cornel Mirea ◽

...

Keyword(s):

Heavy Metals ◽

Water Quality ◽

Water Chemistry ◽

Water Samples ◽

Mine Drainage ◽

Pollution Indices ◽

Mining Activities ◽

River Catchment ◽

High Concentrations ◽

The Impact

This study aims to investigate the quality and vulnerability of surface water (Aries River catchment) in order to identify the impact of past mining activities. For this purpose, the pollution and water quality indices, Piper and Durov plots, as well vulnerability modeling maps were used. The obtained results indicate that the water samples were contaminated with As, Fe, Mn, Pb and have relatively high concentrations of SO42−, HCO3−, TDS, Ca, K, Mg and high values for the electrical conductivity. Possible sources of the high content of chemicals could be the natural processes or the inputs of the mine drainage. Generally, according to the pollution indices, which were correlated to high concentrations of heavy metals, especially with Pb, Fe and Mn, the water samples were characterized by heavy metals pollution. The water quality index classified the studied water samples into five different classes of quality, namely: unsuitable for drinking, poor, medium, good and excellent quality. Similarly, medium, high and very high vulnerability classes were observed. The Durov and Piper plots classified the waters into Mg-HCO3− and Ca-Cl− types. The past and present mining activities clearly change the water chemistry and alter the quality of the Aries River, with the water requiring specific treatments before use.

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Assessing Soil and Plant Pollution by Abandoned Rural Waste Dumping Sites in Ningbo, China

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.138-139.1149 ◽

2011 ◽

Vol 138-139 ◽

pp. 1149-1155 ◽

Cited By ~ 1

Author(s):

Yi Dong Guan ◽

Ye Hong Du ◽

Zhen Dong Li ◽

An Cheng Luo

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Reference Value ◽

Dry Weight ◽

Rice Grain ◽

Contamination Assessment ◽

Plant Parts ◽

Metal Contents ◽

Plant Pollution

This paper reports the concentration of heavy metals (Cr, Cu, Zn, Cd and Pb) in the soils and rices surrounding the abandoned rural waste dumping sites in Ningbo. Igeo (geoaccumulation index) was calculated to assess the contamination degree of heavy metals in soils. The mean contents of Cr, Cu, Cd, Zn and Pb of soils were 33.3, 24.1, 1.5, 118.9 and 45.6 mg/(kg DW) (dry weight), respectively. All of them were much higher than that of the reference value (i.e. CK), but there were no coherent trend of the metal contents within 1-120m distance from the dumping site. Igeo of heavy metals reveals the order of Cd>Cu>Cr>Pb>Zn, and the contamination assessment of soils using Igeo indicate the moderate Cd pollution, while the soils were unpolluted-moderately overall by Cr, Cu, Zn as well as Pb. The heavy metal contents in root, stem & leaf and rice grains were all remarkable higher than that of the CK at 20-120 m distances, and the heavy metal contents in root were evidently much higher than other plant parts, while those in rice grain were lowest, indicating the great bioaccumulation trend of heavy metals. Although the metal contents in the rice grain were within the legislation limit, its bioaccumulation trend of heavy metals was remarkable, whose contents were 4.38-fold for Cr, 1.76-fold for Cu, 1.28-fold for Zn, 2.67-fold for Cd and 3.03-fold for Pb higher than that of reference value, respectively. Finally, we proposed a decentralized in-situ restoration approach for the dumping sites.

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Risk Assessment of Some Heavy Metals in Two Fish Species Oreochromis Niloticus and Clarias Gariepinus from Sharqia Province, Egypt

Journal of Veterinary Medicine and Research ◽

10.47739/veterinarymedicine.1204 ◽

2021 ◽

Vol 8 (1) ◽

pp. 1-5

Author(s):

Nahla S El-Shenawy ◽

Heba N Gad EL-Hak ◽

Mahi A Ghobashy ◽

Maha FM Soliman ◽

Farida A Mansour ◽

...

Keyword(s):

Heavy Metals ◽

Risk Assessment ◽

Human Health ◽

Health Risks ◽

Oreochromis Niloticus ◽

Clarias Gariepinus ◽

Human Health Risk ◽

Dry Weight ◽

Critical Problem ◽

Potential Health

Accumulation of heavy metals in fish is considered a critical problem for human health. Therefore, the study aimed to quantify the concentrations of iron (Fe), zinc (Zn), manganese (Mn), and lead (Pb) in Oreochromis niloticus and Clarias gariepinus from two areas in Al Sharqia governorate, Egypt, from September 2017 to August 2018. A human health risk assessment was conducted to evaluate the potential hazards associated with fish consumption. Metals concentrations (mg/kg dry weight) in muscles of catfish ranged 1.88-221.26 for Fe; 1.78-19.77 for Zn; BDL-238.51 for Mn; BDL-22.75 for Pb. In muscles of tilapia fish metals concentrations ranged 7.96-149.10 for Fe; 1.20-19.77 for Zn; BDL-230.82 for Mn; BDL-25.93 for Pb. Pb had Hazard quotients (HQs) which indicated potential health risks to tilapia consumers at both study areas and catfish consumers at the Faqous area. Fishermen were at higher risk compared to the other consumers.

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Temporal and spatial variation on heavy metal concentrations in the oyster Ostrea equestris on the northern coast of Rio de Janeiro State, Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842005000100010 ◽

2005 ◽

Vol 65 (1) ◽

pp. 67-76 ◽

Cited By ~ 14

Author(s):

A. G Ferreira ◽

A. L. S. Machado ◽

I. R. Zalmon

Keyword(s):

Heavy Metal ◽

Spatial Variation ◽

Rio De Janeiro ◽

Dry Weight ◽

Temporal Variations ◽

Average Concentration ◽

Northern Coast ◽

High Concentrations ◽

Janeiro State ◽

Ostrea Equestris

Heavy metal (Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) concentrations were determined by ICP-AES in Ostrea equestris from three beaches (Barra do Furado, Buena, and Ponta do Retiro) on the northern coast of Rio de Janeiro State. The average concentration was 0.8 ± 0.18, 0.4 ± 0.21, 58 ± 25.6, 249 ± 52.3, 11 ± 1.31, 0.55 ± 0.16, 0.13 ± 0.11, and 1131 ± 321 µg.g-1 dry weight for Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn respectively. Significant spatial variation (p < 0.05) between the samples areas occurred for Cr, Pb, and Zn with higher values in Barra do Furado; and for Cu in Ponta do Retiro. Significant temporal variations (p < 0.05) were observed for all metals except Cu. Temporal variability may be related to changes in the inputs of metals associated with suspended particles. Concentrations were similar to those found in areas under low pollution impact, except for Zn, the high concentrations of which probably reflect the physiological characteristics of these organisms.

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Chemical composition of leaves of a mangrove tree (Sonneratia apetala Buch.-Ham.) and their correlation with some soil variables

Bangladesh Journal of Botany ◽

10.3329/bjb.v39i1.5528 ◽

1970 ◽

Vol 39 (1) ◽

pp. 61-69 ◽

Cited By ~ 8

Author(s):

Ashafaque Ahmed ◽

Mikael Ohlson ◽

Sirajul Hoque ◽

Md Golam Moula

Keyword(s):

Heavy Metals ◽

Chemical Composition ◽

Coastal Zone ◽

Organic Matter Content ◽

Matter Content ◽

Sonneratia Apetala ◽

Mangrove Tree ◽

Soil Variables ◽

Wide Range ◽

High Concentrations

Chemical composition of leaves of Sonneratia apetala Buch.-Ham. collected from three islands (chars) representing three hydrological regimes in a segment of the coastal zone of Bangladesh was studied. Their relations to some soil chemical and physical variables have also been investigated. The results showed that concentrations of B, C, Fe, Ga, Li, Mg, Mn, N, Na, P, Zn and Sr in leaves of S. apetala grown in different islands differed significantly. It was also revealed that some heavy metals, viz. Mn, Fe, Al, Sr and Ti showed wide range of concentrations. The leaves from one of the locations in Motherbunia island were characterized by exceptional high concentrations of heavy metals such as Al, As, Cu, Fe, Li, Ni, Pb that may be due to local contamination. Leaves sampled in the most seaward locations of the same island had highest concentrations of Ba, Ca, Cu, Mn and Na. High Mn concentration was found in the leaves of S. apetala of Motherbunia island. Correlations among soil and plant samples were generally very weak and organic matter content of soil did not appear to play a significant role in the nutrient supply of S. apetala. Key words: Coastal zone; tidal inundation; elemental concentration; Sonneratia apetala DOI: 10.3329/bjb.v39i1.5528Bangladesh J. Bot. 39(1): 61-69, 2010 (June)

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Factors Influencing Geosmin Production by a Streptomycete and their Relevance to the Occurrence of Earthy Taints in Reservoirs

Water Science & Technology ◽

10.2166/wst.1983.0143 ◽

1983 ◽

Vol 15 (6-7) ◽

pp. 191-198 ◽

Cited By ~ 10

Author(s):

S Wood ◽

S T Williams ◽

W R White ◽

F Jones

Keyword(s):

Water Mass ◽

Plant Debris ◽

Water Supplies ◽

Biological Origin ◽

Factors Influencing ◽

Run Off ◽

High Concentrations

Water Authorities in the U.K. receive complaints about taste and odours of chemical and biological origin in water supplies. Earthy flavours associated with actinomycetes, cyanobacteria and/or combinations of these are most prevalent. The study area consisted of five large open reservoirs, four of which have sporadic flavour problems. The possible sources of odourous metabolites were studied (water mass, sediment, plant debris, soil run-off). The water mass required high concentrations of nutrients before actinomycetes produced geosmin; such were not reached in the reservoirs. Sediment yielded geosmin after exposure to air for four weeks and plant debris was found to support geosmin production. The soil surrounding the reservoir supports geosmin production and may contaminate the water by run-off or seepage through the reservoir walls.

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