ÇAM KOZALAK TOZUNUN BİOSORBENT OLARAK KULLANILRAK SUDAN AMONYUMUN UZAKLAŞTIRILMASI

Abstract

Doğal ve sodyum hidroksit ile modifiye edilmiş çam kozalağı tozunun amonyum biosorbenti olarak kullanılmasını araştırıldı. Çam kozalağı tozunun yüzey modifikasyonu için 0.05 mg/L ve 0.1 mg/L sodyum hidroksit çözeltileri kullanıldı. Biosorpsiyon olayına fizikokimyasal etkilerini; pH, başlangıç derişimi ve temas süresi gibi parametrelerle araştırıldı. Bisorpsiyon kapasitesine pH ve temas süresine (ilk 15 dakika) bağımlı olduğu saptanmıştır. Adsorpsiyon kinetikleri ve izotermleri belirlenmiştir. Adsorpsiyon verileri, Langmuir izotermini uymaktadır. SEM, XRD analizleri ile biosorpsiyon karakterizasyonu yapılmıştır. Elde edilen sonuçlara göre çam kozalağının sodyum hidrosit ile modfikasyonu sonucu yüzey alanın değiştiğini, modifiye edilmiş çam kozalağının atıksuların arıtılmasında kullanılması ilgi çekici bir durum olduğu tespit edilmiştir

Keywords

• Ammonyum, Giderim, Su, Biosorpsiyon, Çam kozalağı, XRD, SEM-EDES

REMOVAL OF AMMONIUM FROM WATER BY PINE CONE POWDER AS BIOSORBENT

Abstract

Pine cone, a popular agricultural waste, was investigated as a novel ammonium biosorbent in its raw and sodium hydroxide modified form. Surface modification of pine cone powder were carried out using sodium hydroxide solution of concentarions (0,05 and 0,1mg/L). The effects of physico-chemical parameters such as solution pH, contact time and biosorbent dosage were investigated in the biosorption of ammonium onto pine cone powder. It was found that the biosorption capacity was optimal using 6–10 solution pH range and the rate of sorption was very fast, during the first 15 min. Biosorption kinetics and equilibrium data for the romoval of NH4+ ions onto pine cone powder were examined by fitting the experimental data to various model. The biosortion was described by a pseudo-second-order model predicting a chemisorption process.In addition, the equilibrium data were well characterized by the Langmuir isotherm model that confirmed the mono-layer coverage.  The surface properties of raw pine cone powder and its sodium hydroxide modified form were analyzed by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS) and powder X-ray diffraction (XRD). The chemical composition of pine cone powder before and after biosorption of ammonium is discussed in relation to the XRD and SEM-EDS results. The results showed that the surface of pine cone powder samples is modified by sodium hydroxide solution and the chemical composition of pine cone powder samples is changed after biosorption of ammonium. This from presents an interesting option for tertiary wastewater treatment (as a possible non-conventional biosorbent for the removal of ammonium).

Keywords

• Ammonium; Removal; Water; Biosorption; Pine cone; X-ray; SEM-EDS

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