Dear EEC-2022 Conference Participants, It is my honor to welcome you at the 7th International Conference on Ecological & Environmental Chemistry-2022, which became the good tradition and ensure continuation of series of successful events in this field organized over more than 35 years in 1985, 1995, 2002, 2005, 2008, 2010, 2012 and in 2017 in Chisinau, Republic of Moldova. Ecological and Environmental Chemistry is progressively developing both in the Republic of Moldova and the other countries worldwide attracting the experienced and young scientists, specialists and experts to exchange the novel ideas and present the latest achievements and establish the partnerships in this field. Considering various approaches and development perspectives in Ecological and Environmental Chemistry, which appear in different countries, the EEC 2022 Conference will serve an arena for discussions and interconnections related to scientific approach in research of ecological, physical-chemical and biochemical processes in natural ecosystems and their impacts on human health and environment. Due to the permanently increasing relevance and importance of theoretical and practical issues presented at the EEC-2022 Conference, this Abstract Book has gathered the scientific results presented by over 250 scientists from Armenia, Algeria, Azerbaijan, Belarus, Brazil, China, Czech Republic, Finland, France, Georgia, Hungary, Israel, Italy, Kazakhstan, Moldova, Montenegro, Morocco, Poland, Romania, Russia, Turkey, Ukraine, USA, etc. and will represent the valorous scientific input in this field for our followers for many years afterwards. I would like to express the profound acknowledgement to the Institute of Chemistry, Chemical Society of the Republic of Moldova, Moldova State University, Technical University of Moldova, Moldovan Research and Development Association and other organizations which offered the substantial support and ensured the combination of real and virtual participation at the EEC-2022 Conference