( cest2017_00731) Arsenium and selenium removal from aqueous solutions using eco-materials

摘要

Environmental engineering deals with several fields, most important of them is represented by water resource protection. It is well known, that natural waters and especially groundwater contain dissolved substances, most of them unharmful for earth life, but also some potentially harmful for human and animal life. Ground waters containing dissolved arsenic and/or selenium are not suitable for human and animal life. Some prerequisite microelements for human life as Selenium becomes toxic when higher quantities are ingested. In comparison, arsenic has acute toxic effect over human and animal life even when low quantities are ingested. In both cases, the maximum amount was limited by OMS at 10 μg L-1.A new technique was used to produce an iron oxide doped graphite ecofriendly composite material for arsenic and selenium retention from water solutions. Synthesized material was characterized using SEM, EDX, DRX and DTA. Adsorption capacity and adsorption mechanism were established through equilibrium studies. Maximum adsorption capacity was 400 μg As(V) and 625 μg Se(VI) per gram of adsorbent.