Ecotoxicological impact of two soil remediation treatments in Lactuca sativa seeds

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Pyrethroid pesticides residues have been frequently detected in soils and have been recognized to contribute to soil toxicity. The phytotoxic impact of pesticides was evaluated in Cucumis sativus (C. sativus) seeds. Percentage of seed germination, root elongation, shoot length and leaf length were considered as endpoints to assess the possible acute phytotoxicity of soil by the exposure to pyrethroid pesticides (cypermethrin, deltamethrin and cyhalothrin) and its metabolite phenoxybenzoic acid (3-PBA), in a concentration range between 50 and 500μgkg. For germination percentage, it was only observed a negative impact when seeds were exposed to the metabolite. Cypermethrin showed impact in the three studied endpoints of seed development, while deltamethrin merely affected the root length. Concerning pigments content, it can be said that chlorophylls and total carotenoids median values increased for cypermethrin and deltamethrin. This increase was more pronounced to deltamethrin in joint effect with the organic solvent dimethyl sulphoxide (DMSO). When exposed to cyhalothrin and 3-PBA, no statistically significant differences were observed for C. sativus seeds to all the assessed endpoints of seed development and the investigated pigments content. This research brings new data concerning the relative sensitivity of C. sativus seeds to pyrethroids pesticides commonly found in agricultural facilities, as well as critical understanding and development of using C. sativus for phytotoxicity assessments efforts for pesticide exposures.

Section: Root Shoot and Leaf Developmentmentioning

confidence: 98%

Phytotoxicity of pyrethroid pesticides and its metabolite towards Cucumis sativus

Bragança

Lemos

Barros

et al. 2018

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“…Acute toxicity tests were performed on a certified artificial sandy soil from MIBAL -Minas de Barqueiros S.A. (Apúlia, Portugal). This soil was slightly acid (pH = 5) without organic matter content, a water holding capacity of 50%, and a silica content of approximately 90%, which 99.9% is sand and 0.1% is silt (Rede et al, 2016).…”

Section: Test Organisms Soil and Chemicalsmentioning

confidence: 99%

“…Experimental procedure for acute ecotoxicity tests was set up according to Rede et al (2016) (Rede et al, 2016), which was based on section A.8.6 "Lettuce seed germination (Lactuca sativa)" from EPA 600/3-88-029 (Greene et al, 1996) and EPS 1/RM/45 Report (Biological test method: test for measuring emergence and growth of terrestrial plants exposed to contaminants in soil) (Canada, 2005). Briefly, twenty seeds of L. sativa were placed onto 100 g of pre-dried (104 °C, 24 h) sandy soil in polystyrene petri dishes (Ø = 140 mm).…”

Section: Experimental Designmentioning

confidence: 99%

Individual and mixture toxicity evaluation of three pharmaceuticals to the germination and growth of Lactuca sativa seeds

Rede

Santos

Ramos

et al. 2019

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HIGHLIGHTS• Amoxicillin, ibuprofen and paracetamol acute effects on Lactuca sativa were tested. • Germination and early plant growth were evaluated after a 5-day exposure. • Theexposuretosinglepharmaceuticals boosted the length of L. sativa. • Mixtures of pharmaceuticals prevent the effects of isolated compounds.This work aims to assess, individually and in mixtures, possible phytotoxic effects of three pharmaceuticals (paracetamol, ibuprofen and amoxicillin) on germination and early growth of Lactuca sativa seeds. Pharmaceuticals are an important group of emerging contaminants, whose presence has been described in several environmental compartments, including soils. However, knowledge on their possible impact in terrestrial organisms is still sparse and even more when mixtures are considered. Germination tests are important to evaluate the quality of soil and the toxic effects that contaminants can pose to plants.The acute effects of individual pharmaceuticals as well as binary and ternary mixtures were assessed using different endpoints, namely: percentage of seed germination, root elongation, shoot and leaf length, after an exposure time of five days. Overall, in the exposure of L. sativa seeds to individual pharmaceuticals there are indications of acute toxicity in the early plant growth. However, this inhibitory effect tends to be cancelled in the acute Keywords: Phytotoxicity Lactuca sativa Amoxicillin Paracetamol Ibuprofen Mixtures exposure to mixtures. This study shows the importance of evaluating the toxicity of mixtures of pharmaceuticals, since they might have distinct toxic effects when compared to the single compounds, and also because, probably, it is the closest scenario to the reality that can be found in the environment.

“…Nanoscale zero-valent iron (nZVI) is a compelling illustration of the ecosafety challenges associated with nanoremediation. For instance, Rede et al showed that using nZVI to treat an ibuprofen-contaminated soil had a negative impact in the germination and development of lettuce seeds (Rede et al, 2016). These results indicate that soil nanoremediation treatments might be, under certain circumstances, more prejudicial for terrestrial organisms than contaminated soils.…”

Section: Impact Of Nzvi and Iron-based Particlesmentioning

confidence: 99%

In situ nanoremediation of soils and groundwaters from the nanoparticle's standpoint: A review

Marcon

Oliveras

Puntes

2021

Highlights Anthropogenic pollution has continuously increased since the industrial revolution.  Nanoparticles can provide solutions to in situ cleanup challenges.  Nano-objects are increasingly being deployed in the field since the 2000s.  Their use is not exempt of limitations (aggregation, human health risks). 5 Their slow development in Europe is also due to economic motives and regulatory issues.  Questions concerning toxicity and migration into the matrices need to be answered.Highlights (for review : 3 to 5 bullet points (maximum 85 characters including spaces per bullet point)