Molecular speciation of silver nanoparticle for elucidating bioavailability to plants and macrofauna

银纳米粒子(AgNP)已被用于袜子和布料等各种产品中。产品中的AgNP可以通过洗衣和洗澡活动被洗掉，并最终积累在污水污泥中。银和AgNP的环境行为在很大程度上仍不清楚，土壤中银化合物的研究是阐明银的环境归宿和毒性的关键。我们的研究发现，1)银化合物和AgNP的溶解度取决于土壤的氧化还原电位，2)ANDIC土壤比低地潜育土能够更多地保留银，3)AgNP在氧化土壤条件下保持持久。

Silver nanoparticles (AgNP) have been incorporated into various products such as sock and cloth. AgNP in the products can be washed out via laundry and bathing activities and accumulates eventually in sewage sludge. Environmental behaviors of silver and AgNP remain largely unknown, and investigation of silver compounds in soils is key to elucidating environmental fate and toxicity of silver. Our study found that i) solubility of silver compounds and AgNP are dependent on soil's redox potential, ii) Andic soils can retain silver more than lowland gley soils, and iii) AgNP remains persistent in oxic soil conditions.