Effects of olive mill wastewater physico-chemical treatments on polyphenol abatement and Italian ryegrass (Lolium multiflorum Lam.) germinability

被引:41
作者
Barbera, A. C. [1 ]
Maucieri, C. [1 ]
Ioppolo, A. [1 ]
Milani, M. [3 ]
Cavallaro, V. [2 ]
机构
[1] Univ Catania, Dept Agr & Food Sci DISPA, I-95123 Catania, Italy
[2] Ist Valorizzaz Legno & Specie Arboree IVALSA, Consiglio Nazl Ric, I-95123 Catania, Italy
[3] Univ Catania, Dept Agrifood & Environm Syst Management DiGeSA, I-95123 Catania, Italy
关键词
Olive mill wastewater; Adsorption treatment; Polyphenol abatement; Lolium multiflorum Lam; Germination; PHENOLIC-COMPOUNDS; SALT TOLERANCE; WASTEWATERS; ADSORPTION; STABILIZATION; GERMINATION;
D O I
10.1016/j.watres.2013.11.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Direct spreading on agricultural lands may represent an environmentally friendly disposal method and a possible use of water and nutrients from olive mill wastewaters (OMWs). However, the agronomic use of OMWs is limited, among others by polyphenols, which exert phytotoxic effects. Activated charcoal (AC) has been recognized as a very effective agent for polyphenol abatement, as it enables an irreversible process of phenol adsorption. Addition of calcium hydroxide (Ca(OH)(2)) has also been described as a cheap and effective method in polyphenols abatement. However, the effects of Ca(OH)(2) addition to OMW on seed germination are unclear. In this paper, the effects of AC and/or Ca(OH)(2) on OMW polyphenols abatement, and Lolium multiflorum seed germination have been investigated. The highest polyphenols removal, approximately 95%, was observed when 80 g L-1 of AC was added to OMWs (the maximum dose in this investigation). The addition of Ca(OH)(2) not only improved the effectiveness of the AC treatment but also resulted in a significant rise in Lolium seed germination at the highest AC doses (60 and 80 g L-1). Considering the high salinity (7300 mu S cm (1)) of these wastewaters, low quantities of Ca(OH)(2) may also exert a protective effect on soil structure counteracting the sodium-induced dispersion through the binding action of calcium cation on clays and organic matter. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:275 / 281
页数:7
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