Crystalline phase-dependent toxicity of aluminum oxide nanoparticles toward Daphnia magna and ecological risk assessment

Ecological Drawbacks of Nanomaterials Produced on an Industrial Scale: Collateral Effect on Human and Environmental Health

“…The detrimental influences of graphene-related materials on soil–plant organisms from a terrestrial ecosystem were summarized by Yang et al ( 2020 ), taking into account the perspectives of physiology, biochemistry, and gene expression. Besides, the risk to the aquatic ecology of Al 2 O 3 -ENPs with two crystalline phases (alpha-Al 2 O 3 and eta-Al 2 O 3 ) was studied by Nogueira et al ( 2020 ). They verified the toxic potential of the ENPs toward Daphnia magna even in sublethal concentrations.…”

Emerging investigator series: metal nanoparticles in freshwater: transformation, bioavailability and effects on invertebrates

“…185 Decreased swimming activity, shorter cumulative distance and loss of trajectory orientation of swimming were observed in D. magna. 89,182,184,186,187 Such behaviour damage could be related to the interactions of MNPs with the carapace of the daphnids and perhaps related to the high energy demand and nervous system disorders. 185 The decreased swimming capacity after exposure to MNPs may indicate that the daphnids are directing energy to conserve processes essential to neutralize the toxicity of the MNPs, leading to reduced feeding and a decrease in growth and reproduction.…”

“…MNP exposure can lead to short body length, delayed breeding time, decreased offspring, etc. 126,183,184 The MNPs can physically damage D. magna by adhering to surfaces such as tentacles, skin, and cases through physical adsorption. For example, TiO 2 NPs have also been attached to the D. magna shell, forming a stable ‘shell layer’ that affects the molting process.…”

“…36 Moreover, after 21 d of exposure, the longevity, growth, and reproduction of D. magna decreased significantly with increasing Al 2 O 3 NP concentration from 6.25 to 25 mg L −1 . 184 The survival, growth and reproduction of Daphnia lumholtzi were also reduced after AgNP exposure from 0.1 to 5 μg L −1 for 21 d. 183 Considering that dietary exposure may pose different effects than direct routes, the toxic effects of CuONPs on D. magna were evaluated for two chronic exposure scenarios, i.e., indirect feeding and direct waterborne exposure. 126 The results evidenced that the total number of broods produced per adult decreased in the direct exposure and feeding direction.…”

Physiological and Neurobehavioral Disturbances Induced by Al2O3 Nanoparticle Intoxication in Nile Tilapia Fish: Benefits of Dietary Chamomile Essential Oil

“…The concentration of aluminum oxide nanoparticles (Al 2 O 3 NPs) in the marine environs is at nanogram levels, but the possible hazard of Al 2 O 3 NP in the aquatic ecosystem has been demonstrated in earlier investigations. Nogueira et al [ 3 ] stated that Al 2 O 3 NPs have hazardous effect on Daphnia magna in sublethal levels. Moreover, because of their high surface reactivity, NPs have both acute and chronic detrimental impacts on aquatic species, including conformational changes, chromosomal mutation, and oxidative damage [ 4 ].…”