Zinc and lead detoxifying abilities of humic substances relevant to environmental bacterial species

Perelomov, Leonid; Sarkar, Binoy; Сизова, О. И.; Chilachava, K. B.; Shvikin, A.Y.; Perelomova, Irina; Atroshchenko, Yury

doi:10.1016/j.ecoenv.2018.01.018

Cited by 23 publications

(10 citation statements)

References 27 publications

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“…The solubility of Zn is known to be more sensitive to pH, whereas Fe and Mn solubility notably depends on the redox potential (Pan et al 2014 ). Additionally, the humic acid fraction of organic matter is responsible for immobilizing metal ions (Cu, and Zn) at pH < 6.5 (Chaudhary and Narwal 2005 ; Perelomov et al 2018 ). On the other hand, Fe and Mn may convert to their reduced forms under an anaerobic (low redox) condition leading to higher Fe and Mn solubility.…”

Section: Resultsmentioning

confidence: 99%

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Basak

Sarkar

Naidu

2020

Environ Geochem Health

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The staggering production of rock dusts and quarry by-products of mining activities poses an immense environmental burden that warrants research for value-added recycling of these rock mineral powders (RMP). In this study, an incubation experiment was conducted to determine potassium (K) and micronutrients (Zn, Cu, Fe and Mn) release from a quarry RMP to support plant nutrition. Four different size fractions of the RMP were incubated with organic amendments (cow dung and legume straw) under controlled conditions for 90 days. Samples were collected at different intervals (7, 15, 30, 45, 60 and 90 days) for the analysis of available K and micronutrients in the mineral-OM mixtures and leachates. There was a significant (p \0.05) increase in pH of leachates from the mineral-OM mixtures. The K release was significantly higher from the finer size fraction of RMP. About 18.7% Zn added as RMP was released during the incubation period. Zn release increased from 4.7 to 23.2% as the particle size of RMP decreased. Similarly, Cu release from RMP increased from 2.9 to 21.6%, with a decrease in the particle size. Fe and Mn recovery from RMP recorded 11.2 and 6.6%, respectively. Combined application of OM and RMP showed significantly higher nutrient release than other treatments. This study indicates that effective blending of RMP with organic amendments could be a potential source of K and micronutrients in agriculture without posing a risk of toxic element contamination to the soil.

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Section: Resultsmentioning

confidence: 99%

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Basak

Sarkar

Naidu

2020

Environ Geochem Health

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“…Rhodococcus sp. RS67 is reportedly resistant to Pb 2+ , with the minimum inhibitory concentration (MIC) being 103.6 mg L −1 [53]; similarly, for KF790905.1, the MIC is >330 mg L −1 [54]. In the current study, we used Rhodococcus sp.…”

Section: Discussionmentioning

confidence: 99%

Pb2+ biosorption from aqueous solutions by live and dead biosorbents of the hydrocarbon-degrading strain Rhodococcus sp. HX-2

Cao

Yang

et al. 2020

PLoS ONE

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In this study, the Pb 2+ biosorption potential of live and dead biosorbents of the hydrocarbondegrading strain Rhodococcus sp. HX-2 was analyzed. Optimal biosorption conditions were determined via single factor optimization, which were as follows: temperature, 25˚C; pH, 5.0, and biosorbent dose, 0.75 g L −1. A response surface software (Design Expert 10.0) was used to analyze optimal biosorption conditions. The biosorption data for live and dead biosorbents were suitable for the Freundlich model at a Pb 2+ concentration of 200 mg L −1. At this same concentration, the maximum biosorption capacity was 88.74 mg g −1 (0.428 mmol g −1) for live biosorbents and 125.5 mg g −1 (0.606 mmol g −1) for dead biosorbents. Moreover, in comparison with the pseudo-first-order model, the pseudo-second-order model seemed better to depict the biosorption process. Dead biosorbents seemed to have lower binding strength than live biosorbents, showing a higher desorption capacity at pH 1.0. The order of influence of competitive metal ions on Pb 2+ adsorption was Cu 2+ > Cd 2+ > Ni +. Fourier-transform infrared spectroscopy analyses revealed that several functional groups were involved in the biosorption process of dead biosorbents. Scanning electron microscopy showed that Pb 2+ attached to the surface of dead biosorbents more readily than on the surface of live biosorbents, whereas transmission electron microscopy confirmed the transfer of biosorbed Pb 2+ into the cells in the case of both live and dead biosorbents. It can thus be concluded that dead biosorbents are better than live biosorbents for Pb 2+ biosorption, and they can accordingly be used for wastewater treatment.

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“…; Perelomov et al . ). Previous studies show that a number of metals are bound by biogenic ligands in ocean or estuarine waters (Coale & Bruland ; Tang et al .…”

Section: Discussionmentioning

confidence: 97%

Differential heavy metal sensitivity in seven algal species from the NIES culture collection based on delayed fluorescence assays

Ota

Yamaguchi

Vanel

et al. 2019

Phycological Research

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Seafloor massive sulfide (SMS) deposits are the target of available metallic resources. The toxic impacts of leachable metals from hydrothermal ore by mining operations in marine environments are a concern. However, ecotoxicological knowledge about marine algae, and particularly open ocean species, is still limited. Here, we evaluated the toxic effects of three leachable metals (i.e. Zn, Cu, and Pb) on seven marine algae, including cyanobacteria and eukaryotes, by a delayed fluorescence method. Cyanobacterial Synechococcus and Cyanobium species were sensitive to Zn and Cu, while eukaryotic algae showed various responses to heavy metal species. The prasinophycean Bathycoccus prasinos NIES-2670 was sensitive to all metal species; this strain is a potential test strain to detect the leachable metals. A co-culture experiment showed that the impact on community structure varies depending on leachable metal species. This study demonstrates that surveys across multiple taxonomic groups are necessary to assess the impact of SMS-mining operations on marine ecosystems as a whole.

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Zinc and lead detoxifying abilities of humic substances relevant to environmental bacterial species

Cited by 23 publications

References 27 publications

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Pb2+ biosorption from aqueous solutions by live and dead biosorbents of the hydrocarbon-degrading strain Rhodococcus sp. HX-2

Differential heavy metal sensitivity in seven algal species from the NIES culture collection based on delayed fluorescence assays

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