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Green IONP synthesis still spends ethanol and electricity
A cradle-to-gate LCA of 1 g iron oxide nanoparticles finds lemongrass synthesis greener than NaOH coprecipitation, but ethanol washes and lab electricity still dominate both inventories.
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What two IONP routes were compared by LCA?
C. citratus extract/Na2CO3 green synthesis versus Fe(II/III)/NaOH coprecipitation.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
What functional unit was used?
1 g of IONPs.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Which inventory items dominated both routes?
Ethanol (purification, discarded) and electricity.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Which normalised category was worst?
Marine aquatic ecotoxicity: 1.2×10−8 vs 7.6×10−10.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Did green synthesis still beat coprecipitation?
Yes—lower impacts in each category, even with ‘green’ reagents that have upstream burdens.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Why is discarded ethanol so damaging?
It is used only to wash IONPs and not recovered, despite high production impacts.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
What Fe(III):Fe(II) ratio was used in coprecipitation?
2:1 iron chlorides.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Green-synthesis mixing conditions?
0.26 M FeCl3 in 40 mL extract, 120 rpm, 60 °C, 1 h.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
How were particles washed?
Three 240 mL water washes plus one 240 mL ethanol, 20 000 RFC, 20 min.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
Name a key LCA assumption for the green route.
All iron(III) converts to IONPs; extract is 98% water/2% citral.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified
What drying step is shared?
Oven 70 °C for 24 h.
Source: Environmental Sustainability Evaluation of Iron Oxide Nanoparticles Synthesized via Green Synthesis and the Coprecipitation Method: A Comparative Life Cycle Assessment Study · DOI · quote verified