Analysis of Metal Cations and Inorganic Anions in Olive Oil Mill Waste Waters by Atomic Absorption Spectroscopy and Ion Chromatography. Detection of Metals Bound Mainly to the Organic Polymeric Fracti
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- 作者：Michele Arienzo and Renato Capasso
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2000
- 出版时间：April 2000
- 年：2000
- 卷：48
- 期：4
- 页码：1405 - 1410
- 全文大小：58K
- 年卷期：v.48,no.4(April 2000)
- ISSN：1520-5118
文摘
Metal cations were quantitatively detected by atomic absorption spectrometry in samples of oliveoil mill waste waters obtained by a pressure process (omww1) (K, 17.1; Mg, 2.72; Ca, 2.24; Na, 0.40;Fe, 0.123; Zn, 0.0630; Mn, 0.0147; Cu, 0.00860 g L-1) and a centrifugation process (omww2) (K,9.80; Mg, 1.65; Ca, 1.35; Na, 0.162; Fe, 0.0330; Zn, 0.0301; Mn, 0.00910; Cu, 0.00980 g L-1). Theinorganic anions, determined in the same samples by ion chromatography, proved to be Cl-, H2PO4-,F-, SO42-, and NO3- (1.61, 1.05, 0.66, 0.52, and 0.023 g L-1, respectively, in omww1 and 0.61, 0.40,0.25, 0.20, and 0.0090 g L-1, respectively, in omww2). Most of the metal cations were revealed to bebound to the omww organic polymeric fraction (opf), composed of polysaccharides, phenol polymers,and proteins. Opf relative molecular weight was substantially estimated in the range between 1000and 30000 Da for ~75% and in the range from 30000 to 100000 Da for ~25%. The free residualcations pool proved to be neutralized by the inorganic counteranions. Finally, the possible exploitationof this material in agriculture and in environmental biotechnology processes is also discussed inthe light of its chemical and biochemical oxygen demand parameters.Keywords: Olea europea; olive oil mill waste waters; polymers; metals; inorganic anions;polysaccharides; proteins; polyphenols; ion chromatography (IC); atomic absorption spectrometry(AAS)