Zulin is interested in investigating environmental geochemical behavior (source, transport and fate), removal, effect and risk assessment of organic contaminants including endocrine disrupting compounds (EDCs), persisent organic pollutants (POPs) and emerging organic contaminants (e.g. pesticides, pharmaceutical and personal care products). Also he is interested in developing new analytical and monitoring techniques (e.g. passive sampling, online extraction, chromatography and mass spectrometry) for emerging organic contaminants of different environmental matrices with an emphasis on compounds entering the food chain and having an effect on environmental quality, animal and human health.