Adaptive Interactions between Zinc Oxide Nanoparticles and <i>Chlorella</i> sp.

Chen, Pengyu; Powell, Brian A.; Mortimer, Monika; Ke, Pu Chun

doi:10.1021/es303303g

Cited by 154 publications

(74 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZnO NPs are also effective in a range of environmental control technologies from remediation of environmental pollutants to medical disinfection (Hoffmann et al 1995). Chen et al (2012) found that the effects of ZnO NPs interacting with Chlorella sp. to be bilateral, i.e., the adsorption and aggregation of ZnO NPs compromised algal cell morphology, viability, and membrane integrity, resulting from zinc ion dissolution as well as possible mechanical cell damage induced by the NPs.…”

Section: Bioremediation Of Nanoparticles By Algaementioning

confidence: 99%

“…Studies conducted on microalgae using ZnO NPs showed this metal oxide to cause growth inhibition of Pseudokirchneriella subcapitata (Franklin et al 2007;Aruoja et al 2009) and Dunaliella teriolecta (Manzo et al 2013); decrease viable cells of Chlorella sp. (Chen et al 2012); depress growth rate of four marine phytoplankton species including Skeletonema marinoi, Thalassiosira pseudonana, Dunaliella teriolecta, and Isochrysis galbana (Miller et al 2010), inhibit photosynthetic activity of Anabaena flos-aquae cyanobacteria and to cause cell death in Euglena gracilis euglenoid microalgae (Brayner et al 2010). Zhou et al (2014) have reported that ZnO NPs were toxic to Chlorella vulgaris and the toxicity was dose-dependent.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cumulative effect of zinc oxide and titanium oxide nanoparticles on growth and chlorophyll a content of Picochlorum sp.

Hazeem

Bououdina

Rashdan

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The use of nanoparticles (NPs) is of increasing significance due to their large potential for various applications. Great attention should be paid on the possible impacts of nanoparticles on the environment as large amounts of them may reach the environment by accident or voluntarily. Marine algae are potential organisms for usage in nanopollution bioremediation in aquatic system, because of their ability to adapt to long exposure to NPs. Thus, it is of prime importance to study the possible interactions of different NPs with microalgae in assessing their potential environmental risks. Most studies on potential environmental effects of ZnO and TiO2 NPs have been performed independently and following the widely accepted, standardized test systems, which had been developed for the characterization of chemicals. In this study, we have examined the cumulative effect of ZnO and TiO2 NPs on Picochlorum sp. in addition to the individual effects of these NPs over 32 days. Our results indicate that the toxicity and availability of NPs to marine algae are reduced by their aggregation and sedimentation. NPs are found to have a negative effect on algal growth and chlorophyll a concentration during the early growth stages. In contrast, the case is reversed during the late growth stages. There is no significant difference between the effect of the NPs when they are used separately and when both ZnO and TiO2 are used together in the test (P > 0.05).

show abstract

Section: Bioremediation Of Nanoparticles By Algaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cumulative effect of zinc oxide and titanium oxide nanoparticles on growth and chlorophyll a content of Picochlorum sp.

Hazeem

Bououdina

Rashdan

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Perreault et al studied the effect of polymer coating on copper oxide nanoparticle to green algae, Chlamydomonas reinhardtiiin, with respect to nanoparticle uptake and toxicity, and reported that a high toxicity of polymercoated CuO nanoparticles due to enhancing nanoparticle uptake by algal cells [27]. Chen et al reported that algal cells displayed a remarkable capability of self-protection by minimizing their surface through aggregation mediated by the oppositely charged nano-ZnO particles [28]. Ma et al studied the aggregation of algal cells in the presence of oxide nanoparticles as affected by ionic strength and pH [29].…”

Section: Introductionmentioning

confidence: 99%

Interactions between nano-TiO2 particles and algal cells at moderate particle concentration

Lin

Tseng²,

Huang

2015

Front. Chem. Sci. Eng.

View full text Add to dashboard Cite

Nano-sized titanium dioxide (nano-TiO 2 ) has wide industrial applications and therefore considerable chances of exposure are created for human beings and ecosystems. To better understand the interactions between nano-TiO 2 and aquatic organisms, we first studied TiO 2 uptake by algae exemplified by Pseudokirchneriella subcapitata. P. subcapitata were exposed to nano-TiO 2 in a series of concentrations and at various pH. TiO 2 uptake was quantified using a sedimentation curve analysis technique. After exposure of algae to TiO 2 , the variation of zeta potential was measured and the morphology of algae-TiO 2 aggregate was observed with scanning electron microscopy and the optical microscopy. The steady-state TiO 2 uptake was found to be pH-dependent and the isotherms can be described well by Freundlich model. TiO 2 deposited on algal surfaces causes the shift of pH zpc of TiO 2 -covered algae from that of algae toward that of TiO 2 . The attraction between TiO 2 -covered algal cells induces the agglomeration of algae and TiO 2 and thus the formation of algae-TiO 2 aggregates in the size of 12 to 50 µm. The 2-D fractal dimension of the aggregates is pHdependent and ranges from 1.31 to 1.67. The theoretical analysis of the Gibbs energy of interaction indicates that both TiO 2 uptake by algae and the formation of algae-TiO 2 aggregate are influenced by the interaction between TiO 2 particles.

show abstract

“…DOM in the fresh water samples could help to hinder the TiO 2 -cell heteroagglomeration. NPs adhering to and agglomeration with cells would facilitate NP damage to membranes and entrance of cells, as reported for TiO 2 , CNTs, and ZnO NPs with algal cells (Lin et al, 2012b;Long et al, 2012;Zhang et al, 2015;Chen et al, 2012).…”

Section: The Np-cell Heteroagglomeration In the Water Samplesmentioning

confidence: 77%

Physicochemical transformation and algal toxicity of engineered nanoparticles in surface water samples

Zhang

Yang

et al. 2016

Environmental Pollution

View full text Add to dashboard Cite

a b s t r a c tMost studies on the behavior and toxicity of engineered nanoparticles (NPs) have been conducted in artificial water with well-controlled conditions, which are dramatically different from natural waters with complex compositions. To better understand the fate and toxicity of NPs in the natural water environment, physicochemical transformations of four NPs (TiO 2 , ZnO, Ag, and carbon nanotubes (CNTs)) and their toxicities towards a unicellular green alga (Chlorella pyrenoidosa) in four fresh water and one seawater sample were investigated. Results indicated that water chemistry had profound effects on aggregation, dissolution, and algal toxicity of the NPs. The strongest homoaggregation of the NPs was associated with the highest ionic strength, but no obvious correlation was observed between the homoaggregation of NPs and pH or dissolved organic matter content of the water samples. The greatest dissolution of ZnO NPs also occurred in seawater with the highest ionic strength, while the dissolution of Ag NPs varied differently from ZnO NPs. The released Zn 2þ and especially Ag þ mainly accounted for the algal toxicity of ZnO and Ag NPs, respectively. The NP-cell heteroagglomeration occurred generally for CNTs and Ag NPs, which contributed to the observed nanotoxicity. However, there was no significant correlation between the observed nanotoxicity and the type of NP or the water chemistry. It was thus concluded that the physicochemical transformations and algal toxicities of NPs in the natural water samples were caused by the combined effects of complex water quality parameters rather than any single influencing factor alone. These results will increase our knowledge on the fate and effects of NPs in the aquatic environment.

show abstract

Adaptive Interactions between Zinc Oxide Nanoparticles and Chlorella sp.

Cited by 154 publications

References 32 publications

Cumulative effect of zinc oxide and titanium oxide nanoparticles on growth and chlorophyll a content of Picochlorum sp.

Cumulative effect of zinc oxide and titanium oxide nanoparticles on growth and chlorophyll a content of Picochlorum sp.

Interactions between nano-TiO2 particles and algal cells at moderate particle concentration

Physicochemical transformation and algal toxicity of engineered nanoparticles in surface water samples

Contact Info

Product

Resources

About