Removal of (Ni- So4- Cl2) by using Onions Peel from Wastewater
Rare metals and heavy metals pose a threat to the environment due to many processes, whether natural such as weathering or human beings such as mining, agriculture, industrial activities and burning fossil fuel and vehicle emissions, and their presence poses a significant environmental risk because their toxicity represents many forms of life. They are non-biodegradable, and highly toxic chemicals. Previous studies have suggested that biomass techniques can be absorbed by extracting tannic acid and then used as an absorber. In this study, onion peel, which has more effective functional groups than those in tannic acid, will be used for a longer extraction of plant peel and then used. Practical experience and high efficiency are confirmed by adding them as powder after drying. There are many techniques for removing heavy metals such as chemical oxidation, ion exchange, electrolysis, chemical deposition, etc. They are very expensive and do not completely absorb the metal. Treatment of wastewater containing large amounts of heavy metals, the onion peel can remove around 9 different metals (Ni, So4, Cl2, As, Cd, Cr, Cu, Pb, Hg, Zn, Fe) one of these metal, nickel metal (Ni), and a Sulfate anion (So4) are a new elements we Found, using onion peel as an effective material for the absorption and removal of heavy metals, acid and basic media at different temperatures. Therefore, the use of biomass technology specifically using onion peel is more efficient, less expensive and effective in adsorption and treatment.
Keywords - Aluminium Alloys, Plasma Spray, Thermal Barrier Coatings, Thermal Fatigue, Yttria-Zirconia.