Antibacterial activity of heavy metal-loaded natural zeolite

Hrenović, Jasna; Milenković, Jelena; Ivanković, Tomislav; Rajić, Nevenka

doi:10.1016/j.jhazmat.2011.11.079

Cited by 98 publications

(66 citation statements)

References 18 publications

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“…An aliquot of 100 μL was taken from each diluted solution, spread onto a pre-sterilized LB agar growth media, and incubated at 28°C for 24 h before colony counting. The LB agar growth media is commonly used for lab culturing of a wide range of bacteria including pathogenic bacteria such as E. coli and Staphylococcus aureus (Hrenovic et al, 2012;Tang et al, 2013). The collected mineral phase was resuspended in 10 mL sterilized saline solution, hand mixed thoroughly for 1 min, sequentially diluted 10-fold using saline water (0.85% NaCl) for up to 5 times, followed by the colony forming count for each diluted mixture using the plate cultural method as described above.…”

Section: Fe 3+ -Saturated Montmorillonite Preparationmentioning

confidence: 99%

“…Previous research has shown that clay minerals have high specific surface area, cation exchange capacity, and sorption capacity and, therefore, result in their high sorption capacity for cations including Ag + , Zn 2+ , and Cu 2+ . Research has shown that clay minerals modified with these cations possess antibacterial property (Hrenovic et al, 2012;Hu et al, 2005;Magana et al, 2008;Malachová et al, 2011;Morrison et al, 2014;Tong et al, 2005;Williams and Haydel, 2010). However, the effectiveness of Fe 3+ -modified clay minerals for bacterial disinfection of contaminated water has not been tested.…”

Section: Introductionmentioning

confidence: 99%

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Fe3+-saturated montmorillonite effectively deactivates bacteria in wastewater

Qin

Chen

Shang

et al. 2018

Science of The Total Environment

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• Fe 3+ -saturated montmorillonite's antibacterial activity was studied.• Wastewater bacteria was deactivated effectively by Fe 3+ -saturated montmorillonite.• Fe 3+ -saturated montmorillonite deactivated bacteria possibly by cell membrane damage.• Fe 3+ -saturated montmorillonite can disinfect bacteria-contaminated water. G R A P H I C A L A B S T R A C TThe graphic abstract figure is only for simple demonstration of possible reaction processes. Sizes of different components do not reflect their actual relative scales.a b s t r a c t a r t i c l e i n f o Existing water disinfection practices often produce harmful disinfection byproducts. The antibacterial activity of Fe 3+ -saturated montmorillonite was investigated mechanistically using municipal wastewater effluents. Bacterial deactivation efficiency (bacteria viability loss) was 92 ± 0.64% when a secondary wastewater effluent was mixed with Fe 3+ -saturated montmorillonite for 30 min, and further enhanced to 97 ± 0.61% after 4 h. This deactivation efficiency was similar to that when the same effluent was UV-disinfected before it exited a wastewater treatment plant. Comparing to the secondary wastewater effluent, the bacteria deactivation efficiency was lower when the primary wastewater effluent was exposed to the same dose of Fe 3+ -saturated montmorillonite, reaching 29 ± 18% at 30 min and 76 ± 1.7% at 4 h. Higher than 90% bacterial deactivation efficiency was achieved when the ratio between wastewater bacteria population and weight of Fe 3+ -saturated montmorillonite was at b 2 × 10 3 CFU/mg. Furthermore, 99.6-99.9% of total coliforms, E. coli, and enterococci in a secondary wastewater effluent was deactivated when the water was exposed to Fe 3+ -saturated montmorillonite for 1 h. Bacterial colony count results coupled with the live/dead fluorescent staining assay observation suggested that Fe 3+ -saturated montmorillonite deactivated bacteria in wastewater through two possible stages: electrostatic sorption of bacterial cells to the surfaces of Fe 3+ -saturated montmorillonite, followed by bacterial deactivation due to mineral surface-catalyzed bacterial cell membrane disruption by the surface sorbed Fe 3+ . Freeze-drying the recycled Fe 3+ -saturated montmorillonite after each usage resulted in 82 ± 0.51% bacterial deactivation efficiency Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v even after its fourth consecutive use. This study demonstrated the promising potential of Fe 3+ -saturated montmorillonite to be used in applications from small scale point-of-use drinking water treatment devices to large scale drinking and wastewater treatment facilities.

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Section: Fe 3+ -Saturated Montmorillonite Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fe3+-saturated montmorillonite effectively deactivates bacteria in wastewater

Qin

Chen

Shang

et al. 2018

Science of The Total Environment

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“…This feature is important from two points of view. First, cations introduced in zeolite matrices by ion exchange treatment allow subsequent development of materials for catalytic, medical and antibacterial applications, between many others [10][11][12][13][14][15][16][17]. Secondly, one of the most important applications is the processes of removing of pollutants such as heavy metals from the wastewater of industrial plants, soil, and other sources [18][19][20][21][22][23].…”

Section: Most Important Properties Of Zeolitesmentioning

confidence: 99%

“…2) and ion exchange properties. The processes that include formation of complex-cations on zeolites are important to develop industrially significant materials, such as catalysts [10][11][12] and photocatalysts [13], medicine [14], sensor materials [31,32], feeding additives for farm animals [33], etc.…”

Section: Future Applications Of Zeolitesmentioning

confidence: 99%

Potential uses of natural zeolites for the development of new materials: short review

et al. 2016

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Abstract. Zeolites stand apart among the many families of porous materials. Due to their structure, they have a number of important practical properties such as a high adsorption capacity and the ability to cation exchange. However, the main feature distinguishing them from other porous bodies and inherent only for zeolites is the ordering of the pores in their size, orientation, and mutual locations. Pore diameters for the crystalline structures of various zeolites may vary from 0.25 to about 15 nanometers. The crystalline arrangement of these pores in space converts zeolites in the naturally existing nanostructured materials, possessing the unique property to present ordered location of stabilized nanoparticles.

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“…-treated zeolite (40)(41)(42), CuO/Cu 2 O-coated carbon (43), Zntreated zeolite (44), have all been shown to exhibit a satisfactory removal of bacteria. The prominent negative sides of all of the mentioned materials are its stability, high dependency on exogenous factors (salinity of wastewater, flow velocity, etc.…”

Section: +mentioning

confidence: 99%

Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash

Ivanković¹,

Hrenović²,

Itskos

et al. 2014

Archives of Industrial Hygiene and Toxicology

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Wood fly ash is an industrial by-product of the combustion of different wood materials and is mostly disposed of as waste on landfills. In our preliminary experiments, wood ash exhibited antibacterial activity against urban wastewater bacteria and we focused on wood fly ash as a potential substrate for wastewater disinfection. The addition of ash at a concentration of 10 g L -1 (1 %) caused an instant increase of pH in urban wastewater and landfill leachate. High pH (10.1-12.7) inactivated bacterial populations in the wastewater and the removal of faecal coliforms and intestinal enterococci after 6 h of contact was 100 % (below the detection limit; <1 CFU per mL) with the most efficient ash sample (ash from combustion of beech) both in urban wastewater and landfill leachate. Properly chosen wood fly ash, i.e. one that tends to increase the pH to the greatest extent, proved to be a very effective disinfection substrate. Considering that water treated with wood ash has a high pH and needs to be neutralised before discharge, ash would be suitable for disinfection of leachates when smaller volumes are treated.

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Antibacterial activity of heavy metal-loaded natural zeolite

Cited by 98 publications

References 18 publications

Fe3+-saturated montmorillonite effectively deactivates bacteria in wastewater

Fe3+-saturated montmorillonite effectively deactivates bacteria in wastewater

Potential uses of natural zeolites for the development of new materials: short review

Alkaline disinfection of urban wastewater and landfill leachate by wood fly ash

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