Sulfonamides are frequently detected in the environment, where these compounds adsorb to soil particles and are retained in the environment. However, adsorption of sulfonamides to planktonic particles in the sea is not known. Here we demonstrate that sulfonamides adsorb to a diatom (Chaetoceros) and an arthropod (Artemia), albeit at low levels, under laboratory conditions. In both plankton, sulfamethazine (SMT) was more readily adsorbed than was sulfamethoxazole (SMX). The adsorption occurred quickly and the concentration on the plankton was stable for at least 24 h (Chaetoceros) or 5 h (Artemia). These data suggest that marine plankton may retain sulfonamides, although the adsorbed concentration per cell or individual is not high.

磺酰胺经常在环境中被检测到，这些化合物会吸附到土壤颗粒中并保留在环境中。然而，尚不知道磺酰胺在海洋中对浮游颗粒的吸附。在这里，我们证明了在实验室条件下，即使在低水平下，磺酰胺仍吸附在硅藻（Chaetoceros）和节肢动物（Artemia）上。在两个浮游生物中，磺胺二甲基嘧啶（SMT）比磺胺甲基异恶唑（SMX）更易于吸附。吸附迅速发生，浮游生物上的浓度稳定至少24 h（Chaetoceros）或5 h（Artemia）。这些数据表明，尽管每个细胞或每个个体的吸附浓度不高，但海洋浮游生物可能会保留磺酰胺。