List of Articles Composite adsorbent Open Access Article Abstract Page Full-Text 1 - Recycling the Spent Catalysts of Claus Unit in Natural Gas Refineries and Their Application for Synthesis of Composite Adsorbents Coated by Polypyrrole for the removal of lead ions Nima Fallah Tayebeh Johari mohammad Toosi mohammad hasan Peyrovi 10.22034/jest.2020.33711.4133 Open Access Article Abstract Page Full-Text 2 - Extraction and determination of group of volatile organic compounds by headspace - solid phase microextraction - gas chromatography in tea and vegetable samples Mahboobeh Dehghani Maryam Kazemipour Mehdi Ansari Mehdi shahidizandi 10.30495/qafj.2021.1944457.1017