John Wiley & Sons, Ltd.

Occurrence and dissipation of benzotriazoles and benzotriazole ultraviolet stabilizers in biosolid‐amended soils

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Benzotriazoles (BTs) and benzotriazole ultraviolet stabilizers (BUVSs) are commonly used industrial and household chemicals, but little is known about their dissipation behavior in the soil environment associated with biosolid application. This study investigated the occurrence and dissipation of four BTs (BT, 5‐TT, CBT and XT) and five BUVSs (UV‐326, UV‐327, UV‐328, UV‐329 and UV‐P) in biosolid‐amended soil of three trial sites (Zhejiang, Hunan and Shandong) in China following two treatments (T1: one application of biosolid; T2: repeated application of biosolid). The results showed that except for CBT and XT, the other seven compounds could be detected in most of the biosolid and biosolid‐amended soils at a few to tens ng/g levels, and the concentrations of the seven compounds for T2 were obviously higher than those for T1. In the one year monitoring of Shandong site, two BTs (BT and 5‐TT) and five BUVSs (UV‐326, UV‐327, UV‐328, UV‐329 and UV‐P) were significantly dissipated in the biosolid‐amended soils. The field half‐lives of BT and 5‐TT ranged from 217 to 345 days, while those for the BUVSs ranged between 75 and 218 days. The field half‐lives of target compounds in soil were found comparable with the modeling results. The results from this study suggest the persistence of BTs and BUVSs in soil environments with quite slow dissipation rates. Environ Toxicol Chem © 2013 SETAC

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