El Bakouri H, Morillo J, Usero J, Ouassini A
Department of Chemical and Environmental Engineering, University of Seville, Spain.
Commun Agric Appl Biol Sci. 2007;72(2):197-207.
This study evaluated pesticide contamination of R'mel ground water located in northwest Morocco. The study area is densely populated and thriving, with intensive agriculture. Various techniques, including stir bar sorptive extraction (SBSE) and gas chromatography with mass spectroscopy detection (GC-MS), were used for the quantitative determination of 13 pesticides including alachlor, aldrin, atrazine, chlorpyrifos, chlorfenvinphos, dieldrin, alpha-endosulfan, endrin, hexachlorobenzene, beta-HCH, gamma-HCH (lindane), simazine and trifluralin. The survey results showed that contamination by pesticide residues is widespread in the area. With the exception of atrazine, the average concentrations were all below the regulatory limits established by the European Union. The potential of ten natural organic substances to eliminate pesticides included in the European Water Framework Directive was evaluated. The absorbents with the highest removal efficiency were date and olives stones and, to a Lesser degree, Raphanus raphanistrum and Cistus ladaniferus. The adsorption tests gave very satisfying results and pointed to the possible application of these supports as ecoLogical remediation techniques to prevent pesticide pollution of aquatic ecosystems.
本研究评估了摩洛哥西北部R'mel地区地下水的农药污染情况。研究区域人口密集且繁荣，农业集约化程度高。采用了多种技术，包括搅拌棒吸附萃取（SBSE）和气相色谱-质谱检测（GC-MS），对包括甲草胺、艾氏剂、莠去津、毒死蜱、毒虫畏、狄氏剂、α-硫丹、异狄氏剂、六氯苯、β-六六六、γ-六六六（林丹）、西玛津和氟乐灵在内的13种农药进行定量测定。调查结果表明，该地区农药残留污染普遍存在。除莠去津外，平均浓度均低于欧盟规定的监管限值。评估了十种天然有机物质去除《欧洲水框架指令》中所列农药的潜力。去除效率最高的吸附剂是椰枣和橄榄石，其次是萝卜和岩蔷薇。吸附试验取得了非常令人满意的结果，表明这些载体作为生态修复技术用于防止水生生态系统农药污染具有应用潜力。
