Hydrothermal synthesis of needle-like nanocrystalline zeolites from metakaolin and their applications for efficient removal of organic pollutants and heavy metals

Luo, Huimin; Law, Wei Wee; Wu, Yichao; Zhu, Weiping; Yang, En-Hua

doi:10.1016/j.micromeso.2018.06.015

Cited by 86 publications

(19 citation statements)

References 45 publications

(73 reference statements)

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“…A single drop of BioSeNPs solution was dried on a 200-mesh copper TEM grid for TEM-EDS examination. The X-ray diffractometer was equipped with a Cu anode (40 kV and 30 mA) and scanning was from 5 to 80 o 2θ, and phase identification was carried out as previously described (Luo et al, 2018).…”

Section: Preparation Of Saline Solution/soil and Biosenpsmentioning

confidence: 99%

Immobilization of elemental mercury by biogenic Se nanoparticles in soils of varying salinity

Wang

Pan

Gadd

2019

Science of The Total Environment

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Salinity can be a significant environmental stress which can govern the fate of nanoparticles in the environment as well as other factors such as pH, natural organic matter and minerals. In this research, the effects of salinity on the behaviour of biogenic selenium nanoparticles (BioSeNPs) and consequences for elemental mercury (Hg 0 ) immobilization in soil and soil solutions were investigated. It was found that homoaggregation and sedimentation of BioSeNPs were enhanced significantly with increasing salinity. Compression of the electric double layers of BioSeNPs at high ionic strengths resulted in attractive van der Waals forces dominating and leading to enhanced aggregation. Moreover, neutralization of the surface negative charge of BioSeNPs by divalent cations and the bridging of BioSeNPs via calcium binding to surface functional groups were also associated with enhanced aggregation. Such enhanced aggregation exerted inhibition of Hg 0 immobilization in soil solutions/soils of varying salinity. These results indicate that salinity is an important environmental factor governing aggregation of BioSeNPs and therefore influencing the efficiency of Hg 0 immobilization, and possible remediation treatments, as a consequence.

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Section: Preparation Of Saline Solution/soil and Biosenpsmentioning

confidence: 99%

Immobilization of elemental mercury by biogenic Se nanoparticles in soils of varying salinity

Wang

Pan

Gadd

2019

Science of The Total Environment

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“…Surface-modified nano-scale carbon black can reduce the bioavailability of Cu and Zn; also, nanometer hydroxyapatite can remove Cd pollution from the soil, which promotes plant growth [82,83]. On the other hand, nanometer zeolite can remove Cu and Pb; both are organic and heavy metal pollutants of soil [84]. Some researchers [85,86] showed that Cd and Zn pollution could be repaired with the help of a ferric tetroxide nanometer.…”

Section: Nanomaterials For Soil Remediationmentioning

confidence: 99%

Potential Applications of Nanotechnology in Agriculture: A Smart Tool for Sustainable Agriculture

Tipu¹,

Baroi²,

Rana³

et al. 2022

Agricultural Development in Asia - Potential Use of Nano-Materials and Nano-Technology

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Most of the early uses of nanotechnology have come from material sciences, although applications in agriculture are still expanding. Due to a few comprehensive reviews, we described application of nanomaterials along with their fate in soil and interaction with soil and plant system. From synthesis to metabolism, nano-fertilizers like zinc, silver, selenium, titanium oxide have enhanced the physio-chemical characteristics of crop plants in every manner conceivable. On the other hand, it has the potential to minimize pesticide use by boosting reactivity and surface area of nanoparticles. Nanotechnology in pesticides will, without a doubt, replace the current way of pesticide application because of its efficacy. Nano-based approaches can readily overcome the constraints of conventional soil remediation technologies. While soil nanomaterials mobility has been investigated in a limited number of research studies, it’s likely the most critical gap in knowing the real risk of their transport. As well as enhancing plant nutrient absorption, nanomaterials may also be used to regulate soil microbial activity and stimulate plant defenses. When it comes to shipping food, nanotechnology has made things easier by extending the shelf life of most foods. While it offers tremendous potential for agricultural applications, the health effects of nanoparticles on plants, animals, and humans must be thoroughly investigated.

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“…To measure the Ag concentrations in suspension (including elemental Ag in organisms and in the bulk solution), unfiltered microcosm samples were digested with 30% H 2 O 2 (5 mL) and HNO 3 (final concentration ¼ 5% v/v HNO 3 ) and then successively passed through a 0.45-mm aperture pinhole filter. Ag content was determined with ICP-MS (Luo et al, 2018). All experiments were repeated three times independently.…”

Section: Measurement Of Chl-a and Ag In The Microcosmsmentioning

confidence: 99%

Insights into the transcriptional responses of a microbial community to silver nanoparticles in a freshwater microcosm

Lavoie

et al. 2020

Environmental Pollution

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Silver nanoparticles (AgNPs) are widely used because of their excellent antibacterial properties. They are, however, easily discharged into the water environment, causing potential adverse environmental effects. Meta-transcriptomic analyses are helpful to study the transcriptional response of prokaryotic and eukaryotic aquatic microorganisms to AgNPs. In the present study, microcosms were used to investigate the toxicity of AgNPs to a natural aquatic microbial community. It was found that a 7-day exposure to 10 mg L À1 silver nanoparticles (AgNPs) dramatically affected the structure of the microbial community.Aquatic micro eukaryota (including eukaryotic algae, fungi, and zooplankton) and bacteria (i.e., heterotrophic bacteria and cyanobacteria) responded differently to the AgNPs stress. Meta-transcriptomic analyses demonstrated that eukaryota could use multiple cellular strategies to cope with AgNPs stress, such as enhancing nitrogen and sulfur metabolism, over-expressing genes related to translation, amino acids biosynthesis, and promoting bacterial-eukaryotic algae interactions. By contrast, bacteria were negatively affected by AgNPs with less signs of detoxification than in case of eukaryota; various pathways related to energy metabolism, DNA replication and genetic repair were seriously inhibited by AgNPs. As a result, eukaryotic algae (mainly Chlorophyta) dominated over cyanobacteria in the AgNPs treated microcosms over the 7-d exposure. The present study helps to understand the effects of AgNPs on aquatic microorganisms and provides insights into the contrasting AgNPs toxicity in eukaryota and bacteria.

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Hydrothermal synthesis of needle-like nanocrystalline zeolites from metakaolin and their applications for efficient removal of organic pollutants and heavy metals

Cited by 86 publications

References 45 publications

Immobilization of elemental mercury by biogenic Se nanoparticles in soils of varying salinity

Immobilization of elemental mercury by biogenic Se nanoparticles in soils of varying salinity

Potential Applications of Nanotechnology in Agriculture: A Smart Tool for Sustainable Agriculture

Insights into the transcriptional responses of a microbial community to silver nanoparticles in a freshwater microcosm

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