Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 2
Written by Gergana MAROVSKA, Anton SLAVOV
Lavender (Lavandula angustifolia Mill.) and rose (Rosa Damascena Mill.) industrial by-products were used as natural, biodegradable, readily available and cheap bioadsorbents to remove the azo dye 2-naphthol orange from waste waters. The influence of contact time, pH, adsorbent amount, initial dye concentration, temperature, sonication and adsorbent particle size was investigated. The acidic medium favored the adsorption and at pH .5, 99% efficiency (for lavender as adsorbent) was achieved. The results of the present study confirmed the successful application of essential oil industrial lavender and rose by-products as bioadsorbents for efficient removal of 2-naphtol orange from waste waters as a new method for valorization of the by-products from agricultural industry.
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