Derik Halhalı Zeytin Çekirdeğinden Çevre Dostu Selülozik Manyetik Nano-Adsorbent Üretimi ve Benzen Gideriminde Kullanılması

Abstract

Uçucu organik bir bileşik (UOB) olan benzen, kimyasal ve petrokimyasal gibi faaliyetlerle sanayiden ve endüstriden atmosfere salınmaktadır. Benzen, canlı sağlığı ve çevre için ağır kirliliklerden biri olup, kanserojen, mutajenik ve oldukça toksik polar olmayan kirleticidir. İnsan sağlığı ve ekolojik çevre için bir potansiyel tehlikedir. Bu sebeple benzenin bir kirletici olarak atmosferden uzaklaştırılması büyük önem taşımaktadır. Bu çevresel iyileştirme çalışmasında, Derik Halhalı zeytininin çekirdeği bir doğal selüloz (DS) kaynağı olarak manyetit (Fe3O4) modifikasyonunda kullanıldı. Başarıyla üretilen Fe3O4/DS nano-adsorbentin benzen giderimine karşı adsorpsiyon özellikleri incelendi. Birlikte çökeltme yöntemiyle elde edilen Fe3O4/DS nano-adsorbenti SEM-EDS, FTIR ve BET analizleri ile karakterize edildi. Benzen giderim prosesinde, benzen başlangıç konsantrasyonu, adsorbent miktarı, adsorpsiyon süresi ve adsorpsiyon sıcaklığı gibi farklı parametrelerin etkileri değerlendirildi. Optimum değerler olarak belirlenen 90 dakika adsorpsiyon süresi, 15 ppm benzen başlangıç konsantrasyonu, 100 mg adsorbent miktarı ve 25°C adsorpsiyon sıcaklığı gibi koşullar altında benzen adsorpsiyon kapasitesi 298,15 mg/g olarak bulundu. Bu sonuç, başarıyla üretilen Fe3O4/DS nano-adsorbentin UOB kirleticilerin giderimindeki uygulama potansiyelini ortaya koymaktadır. Öte yandan, Quasi-birinci-dereceden kinetik modeli takip eden gaz halindeki benzenin Fe3O4/DS nano-adsorbenti üzerine adsorpsiyon prosesi fiziksel adsorpsiyon mekanizmasını işaret etmektedir. Ayrıca, 1.74 kJ mol-1 olarak hesaplanan E değeri (Dubinin-Radushkevich model sabiti) adsorpsiyon prosesinin fiziksel etkileşim mekanizması üzerinden gerçekleştiğini desteklemektedir. Son olarak, beş döngüden sonra Fe3O4/DS nano-adsorbenti %90.61'lik yeniden kullanım verimliliği sürdürdüğü görüldü, bu da nano-adsorbentin pratik uygulamalarda büyük potansiyele sahip olduğu anlamına gelir.

Keywords

• Adsorpsiyon
• Benzen giderimi
• Derik Halhalı zeytini
• Fe3O4/DS
• Nano-adsorbent

Production of Eco-Friendly Cellulosic Magnetic Nano-Adsorbent from Derik Halhali Olive Seed and Its Use in Benzene Removal

Abstract

Benzene, a volatile organic compound (VOC), is released into the atmosphere from industry and industry through chemical and petrochemical activities. Benzene is one of the heavy pollutants for living health and the environment, and it is a carcinogenic, mutagenic and highly toxic non-polar pollutant. It is a potential hazard to human health and the ecological environment. For this reason, it is of great importance to remove benzene from the atmosphere as a pollutant. In this environmental improvement study, Derik Halhali olive seed was used as a natural cellulose (NC) source in the modification of magnetite (Fe3O4). The adsorption properties of the successfully produced Fe3O4/NC nano-adsorbent against benzene removal were investigated. Fe3O4/NC nano-adsorbent obtained by co-precipitation method was characterized by SEM-EDS, FTIR and BET analyses. In the benzene removal process, the effects of different parameters such as benzene initial concentration, adsorbent amount, adsorption time and adsorption temperature were evaluated. Benzene adsorption capacity was found to be 298.15 mg/g under the optimum values such as 90 min adsorption time, 15 ppm initial concentration of benzene, 100 mg adsorbent amount and 25°C adsorption temperature. This result reveals the application potential of the successfully produced Fe3O4/NC nano-adsorbent in the removal of VOC pollutants. On the other hand, the adsorption process of gaseous benzene on Fe3O4/NC nano-adsorbent following the Quasi-first-order kinetic model indicates the physical adsorption mechanism. In addition, the E value (Dubinin-Radushkevich model constant) calculated as 1.74 kJ/mol supports that the adsorption process takes place through the physical interaction mechanism. Finally, after five cycles, the Fe3O4/NC nano-adsorbent was found to maintain a reuse efficiency of 90.61%, meaning that the nano-adsorbent has great potential in practical applications.

Keywords

• Adsorption
• Benzene removal
• Derik Halhali olive seed
• Fe3O4/DS
• Nano-adsorbent
• Adsorption, Benzene removal, Derik Halhali olive seed, Fe3O4/DS, Nano-adsorbent

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