Immobilization of mercury using high-phosphate culture-modified microalgae

Huang, Rong; Huo, Guangcheng; Song, Shaoxian; Li, Yinta; Xia, Ling; Gaillard, Jean François

doi:10.1016/j.envpol.2019.112966

Cited by 52 publications

(13 citation statements)

References 52 publications

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“…The XPS spectra in Figure 4a show that the carbon peak was composed of four components: a C−C/CH x peak (aliphatic groups) near 284.8 eV; 34 35−37 Consequently, according to the above analysis, it was confirmed that some chemical groups (hydroxyl, carboxyl, and amine) present in the untreated Chlorella had been preserved in the HMMNs. These natural chemical groups on the Chlorella shell facilitate subsequent chemical modification with no need for complex surface functionalization.…”

Section: ■ Results and Discussionmentioning

confidence: 80%

Microwave-Assisted Synthesis of Hollow Microspheres with Multicomponent Nanocores for Heavy-Metal Removal and Magnetic Sensing

Luan

Geng

et al. 2020

ACS Appl. Mater. Interfaces

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The primary advantage of a hollow structure is the likelihood of introducing diverse components in a single particle to achieve multiple missions. Herein, hollow microspheres with multicomponent nanocores (HMMNs) have been prepared based on a template-free strategy via a microwave-assisted hydrothermal treatment of Chlorella. The resulting HMMNs retain the nearspherical hollow morphology and functional groups of the cell wall of Chlorella, obviating the need for templates and chemical modification. The elements (iron, cobalt, calcium, magnesium, chlorine, and phosphorus) naturally present within the Chlorella cells react to form hydroxyapatite/chlorapatite and magnetic nanocores without the need for exogenous chemical reagents. The performances of HMMNs for cadmium ion (Cd 2+ ) removal and antibiotic detection are explored. HMMNs exhibit relatively high adsorbance of Cd 2+ (1035.8 mmol/kg) and can be easily recovered by application of an external magnetic field. Ion exchange with Ca 2+ and Mg 2+ is shown to be the main mechanism of Cd 2+ elimination. In addition, HMMNs are a suitable carrier for the construction of a magnetic immunosensor, as demonstrated by the successful development of such an immunosensor with acceptable analytical performance for the detection of neomycin in milk samples. The versatile applications of HMMNs result from their multicomponent nanocores, hollow structure, and the functional groups on their shell. This work not only offers a simple and eco-friendly strategy for the fabrication of novel HMMNs but also provides a valuable advanced material for contaminant detection and heavy-metal removal.

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Section: ■ Results and Discussionmentioning

confidence: 80%

Microwave-Assisted Synthesis of Hollow Microspheres with Multicomponent Nanocores for Heavy-Metal Removal and Magnetic Sensing

Luan

Geng

et al. 2020

ACS Appl. Mater. Interfaces

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“…In this regard, the components of cell wall are functionally important key players and the binding affinity of cell surface to HMs in question is a key parameter determining the effectiveness of this mechanism. Modification of cultivation conditions to alter surface properties has been demonstrated to improve Hg biosorption in Scenedesmus obtusus XJ-15 (Huang et al, 2019). Moreover, increased accumulation of extracellular polymeric substances (EPSs) such as exopolysaccharides (Xiao and Zheng, 2016;Naveed et al, 2019) have been reported as a HM stress response mechanism in Chlamydomonas reinhardtii (Li et al, 2021) presumably because HMs can immobilize onto these substances.…”

Section: Microalgal Mechanisms To Remove Heavy Metals From Wastewater Effluentsmentioning

confidence: 99%

Synthetic Biology-Based Approaches for Microalgal Bio-Removal of Heavy Metals From Wastewater Effluents

Sattayawat

Yunus

Noirungsee

et al. 2021

Front. Environ. Sci.

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Heavy metal polluted wastewater from industries is currently one of the major environmental concerns leading to insufficient supply of clean water. Several strategies have been implemented to overcome this challenge including the use of microalgae as heavy metal bio-removers. However, there are still limitations that prevent microalgae to function optimally. Synthetic biology is a new biological discipline developed to solve challenging problems via bioengineering approaches. To date, synthetic biology has no universally affirmed definitions; however, it is uncontroversial that synthetic biology utilizes a constructive library of genetic standardized parts to create new biological systems or to redesign existing ones with improved characteristics. In this mini-review, we present state-of-the-art synthetic biology-based approaches that can be used to enhance heavy metal bio-removal from wastewater effluents by microalgae with a narrative synthetic biology workflow (Design-Build-Test-Learn cycle) to guide future developments of more advanced systems. We also provide insights into potent genes and proteins responsible for the bio-removal processes for stepwise developments of more advanced systems. A total of 49 unique genes and proteins are listed based on their eight heavy metals (Mn, Fe, Cu, Zn, As, Cd, Hg, and Pb) bio-removal functions in transport system, cellular tolerance, synthesis of key players in heavy metal bio-removal, biotransformation of heavy metals, and gene expression regulation. Thus, with our library, genetic parts are ready to be recruited for any synthetic biology-based designs. Thereby, this mini-review identifies potential avenues of future research and maps opportunities to unleash more potential of microalgae as heavy metal bio-removers with synthetic biology.

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“…Algae is an easily available, cheap and non-toxic tool for eliminating Hg 21 (Huang et al, 2019). Different metals may prefer binding with a variety of cell walls of algae such as brown algae, red algae and green algae (Amasha et al, 2019;Thakur et al, 2020).…”

Section: Biomaterialsmentioning

confidence: 99%

Modern nanobiotechnologies for efficient detection and remediation of mercury

Gaur

Yadav

Kushwah

et al. 2021

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Purpose This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. Design/methodology/approach Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples. Findings This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples. Originality/value This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

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Immobilization of mercury using high-phosphate culture-modified microalgae

Cited by 52 publications

References 52 publications

Microwave-Assisted Synthesis of Hollow Microspheres with Multicomponent Nanocores for Heavy-Metal Removal and Magnetic Sensing

Microwave-Assisted Synthesis of Hollow Microspheres with Multicomponent Nanocores for Heavy-Metal Removal and Magnetic Sensing

Synthetic Biology-Based Approaches for Microalgal Bio-Removal of Heavy Metals From Wastewater Effluents

Modern nanobiotechnologies for efficient detection and remediation of mercury

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