Bryant Michael Taylor, Ren Jianhong, Sharma Virender K, Ma Xingmao
Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States.
Department of Environmental Engineering, Texas A&M University-Kingsville, Kingsville, Texas 78363, United States.
ACS Agric Sci Technol. 2024 Mar 26;4(4):463-470. doi: 10.1021/acsagscitech.3c00600. eCollection 2024 Apr 15.
Organic contaminants, such as pesticides and pharmaceuticals, are commonly found in agricultural systems. With the growing use of plastic products, micro- and nanoplastics (MNPs) are increasingly detected in these agricultural systems, necessitating research into their interactions and joint effects to truly understand their impact. Unfortunately, while there has been a long history of research into the uptake of organic pollutants by plants, similar research with MNPs is only beginning, and studies on their mutual effects and plant uptake are extremely rare. In this study, we examined the effects of three agriculturally relevant organic pollutants with distinctive hydrophobicity as measured by log (trimethoprim: 0.91, atrazine: 2.61, and ibuprofen: 3.97) and 500 nm polystyrene nanoplastics on their uptake and accumulation by lettuce at two different salinity levels. Our results showed that nanoplastics increased the shoot concentration of ibuprofen by 77.4 and 309% in nonsaline and saline conditions, respectively. Alternatively, organic co-contaminants slightly lowered the PS NPs uptake in lettuce with a more pronounced decrease in saline water. These results underscore the impactful interactions of hydrophobic organic pollutants and increasing MNPs on a dynamic global environment.
有机污染物，如农药和药品，在农业系统中普遍存在。随着塑料制品使用的增加，在这些农业系统中越来越多地检测到微塑料和纳米塑料（MNPs），因此有必要研究它们之间的相互作用和联合效应，以便真正了解它们的影响。不幸的是，虽然对植物吸收有机污染物的研究历史悠久，但对MNPs的类似研究才刚刚开始，关于它们的相互作用和植物吸收的研究极为罕见。在本研究中，我们研究了三种与农业相关的具有不同疏水性的有机污染物（通过log值衡量：甲氧苄啶为0.91、莠去津为2.61、布洛芬为3.97）以及500纳米的聚苯乙烯纳米塑料在两种不同盐度水平下对生菜吸收和积累的影响。我们的结果表明，在非盐和盐条件下，纳米塑料分别使生菜地上部分布洛芬的浓度增加了77.4%和309%。另外，有机共污染物略微降低了生菜对PS NPs的吸收，在盐水中这种降低更为明显。这些结果强调了疏水性有机污染物和不断增加的MNPs在动态全球环境中的重大相互作用。
