Abstract

This article considers the influence that suspensions of nanoparticles (sized from 10 to 60 nm) of iron oxo-compounds in different oxidation states have on biological objects. The suspension is formed by the interaction of metallic iron with aqueous solutions of humic substances. Based on the example of green microalgae Scenedesmus quadricauda (Turp.) Breb., it is shown that suspensions that contain iron oxo-compound nanoparticles stabilized with humic substances at an iron concentration from 0.14 to 2036 µM do not have a toxic effect on microalgae. The availability of iron contained in the suspensions was evaluated in the experiment on sprouts of wheat Triticum aestivum L., which had been grown under iron-deficient conditions. The root uptake of the ionic form of iron contained in the suspension was confirmed. It is shown that the studied suspensions of iron nanoparticles stabilized by humic substances accumulate on the surface of plant roots. These suspensions are supposed to be a source of iron with prolonged action for plants.

中文翻译：

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估算金属铁与腐殖质相互作用产物的毒性和生物利用度

摘要

本文考虑了不同氧化态的铁氧化合物纳米粒子（尺寸为10至60 nm）的悬浮液对生物物体的影响。悬浮液是由金属铁与腐殖质水溶液相互作用形成的。以绿色微藻（Scendesmus quadricauda（Turp。）Breb。）为例，研究表明，含有腐殖质且铁浓度为0.14到2036 µM的含氧代铁化合物纳米颗粒的悬浮液对微藻没有毒性。在小麦普通小麦萌芽试验中评估了悬浮液中铁的有效性。L.，已在缺铁条件下生长。确认了悬浮液中所含铁离子形式的根吸收。结果表明，被腐殖质稳定的铁纳米颗粒悬浮物积聚在植物根部表面。这些悬浮液被认为是植物中铁的来源，具有长效作用。