Extrapolation of PBBs Environmental Transformation Mechanisms and Toxicity Risks of Byproducts.

Polybrominated biphenyls (PBBs) are commonly used flame retardants that pose severe risks to humans. However, there is a lack of systematic research on the transformation process and biological toxicities of PBBs in the environment, which is not conducive to the prevention and control of pollution risks of PBBs. Therefore, the transformation pathways (i.

Risk mitigation strategy and mechanism analysis of neonicotinoid pesticides on earthworms.

Neonicotinoid insecticides (NNIs) are a new class of widely used insecticides with certain risks to non-target organisms, like earthworms. The gray correlation method was used to calculate the comprehensive risk effect value of acute toxicity (LC) and bioaccumulation (logK) of NNIs on earthworms. A comprehensive effects three-dimensional quantitative structure-activity relationship (3D-QSAR) model was constructed, using NNIs molecular structures and the comprehensive effect value as the independent and dependent variables, respectively.