Assesing the effect of an olive mill wastewater evaporation pond in Sousse, Tunisia
Assesing the effect of an olive mill wastewater evaporation pond in Sousse, Tunisia
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评估突尼斯苏塞橄榄厂废水蒸发池的效果
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Ben Dhia
中科院分区：
文献类型：
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作者：
R. S’habou;M. Zairi;Amjed Kallel;A. Aydi;H. Ben Dhia
橄榄油是地中海国家典型的、有价值的农工产品。在突尼斯，橄榄油厂废水（OMW）的量达到约1，000，000吨/年，并且由于高化学需氧量值和植物毒性和抗菌多酚的存在而构成严重的有机污染风险。OMW通常储存在池塘中，通过自然蒸发或通过在耕作土壤上散布或通过堆肥来消除。在实验室尺度（土柱）上研究有机分子与土壤的相互作用已有很多报道，但在田间尺度上研究有机分子对土壤的影响较少。这项工作的目的是调查一个超过15年的地区作为一个不受控制的OMW池塘网站。OMW储存过程中发生的土壤性质和地下水的转化的特点是pH值，酚类含量，电导率（EC），水分含量和有机物含量。土壤样品取自两个钻孔，并与位于池塘附近的对照样品进行比较。在可接近和离蒸发池最近的威尔斯水井中采集了地下水样本。场地中的可渗透粉质和桑迪层支持蒸发池附近的OMW渗透。这种渗透已经达到了6米的深度，横向距离几乎为50米。结果表明，有机质入渗对土壤pH、EC、有机质含量、酚类化合物和含水量均有影响。
Olive oil is a typical and valuable agro-industrial product in Mediterranean countries. In Tunisia, olive mill wastewaters (OMW) reach an amount of about 1,000,000 t year−1 and constitute a serious organic pollution risk because of the high chemical oxygen demand values and the presence of phytotoxic and antibacterial polyphenols. OMW have been generally stored in pond sites to be eliminated by natural evaporation or valorised by spreading on cultivated soils or by composting. Many researches on the interactions of OMW with soils at laboratory scale (columns) have been reported, but less attention have been paid to the effect of OMW on soils at field scale. The aim of this work is to investigate an area used for >15 years as an uncontrolled OMW pond site. The transformations of soil properties and groundwater occurring during OMW storage were characterised by the pH, phenolic contents, electrical conductivity (EC), moisture content and organic contents. The soil samples were taken from two borings and compared to those of a control one located near the pond site. Groundwater samples were taken on the accessible and nearest water wells to the evaporation ponds. The permeable silty and sandy layers in the site support the infiltration of OMW near the evaporation ponds. This infiltration has reached a depth of 6 m at a distance of almost 50 m laterally. The results show that the OMW infiltration in the subsoil has affected the pH, EC, organic content, phenolic compounds and the moisture.