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首页> 外文期刊>Environmental Monitoring and Assessment >Environmental monitoring of linear alkylbenzene sulfonates and physicochemical characteristics of seawater in El-Mex Bay (Alexandria, Egypt)
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Environmental monitoring of linear alkylbenzene sulfonates and physicochemical characteristics of seawater in El-Mex Bay (Alexandria, Egypt)

机译：El-Mex湾（埃及亚历山大）的线性烷基苯磺酸盐环境监测和海水理化特性

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摘要

In the present work, the influence of different physicochemical characteristics on the distribution of anionic detergents, linear alkylbenzene sulfonates (LAS), was studied. Surface and bottom water samples were collected from eight different sites from a small bay near the main sewage discharge of Alexandria City (El-Max Bay). The results showed great variations in the concentrations, as a function of the regional and seasonal variations. The study revealed that the pH values lie in the normal side, with a range of 8.0-8.5 inside the bay and 7.5-7.7 at El-Umum Drain effluent. Wide variations, observed between the surface and the bottom water of the bay, salinity, dissolved oxygen, oxidizable organic matter, total hardness, and total alkalinity, were scattered in the ranges (3.33-2.73 practical salinity unit), (0.42-8.27 mg O_2/l), (0.12-10.49 mg/l), (1.39-8.99 mg/l), and (0.23-0.48 mg/l), respectively. The regional variations of LAS concentrations in the bay waters showed that the concentration decreased as the distance from the source of drainage water (El-Umum Drain). The seasonal average variations of LAS cleared out that summer and spring periods had the highest concentrations at surface (0.13 ±0.04 mg LAS/l) and bottom (0.12±0.10 mg LAS/l) layer, which is attributed to increase in population density and human activities. The inverse relationships between total LAS concentration and salinity, dissolved oxygen, and calcium ions concentration are r=-0.78, 0.50, and 0.67, respectively. This is related to the occurrence of the untreated wastewater containing detergents, the biodegradation rate of surfactants, and strong precipitation of LAS as Ca.
机译：在目前的工作中，研究了不同理化特性对阴离子去污剂直链烷基苯磺酸盐（LAS）分布的影响。从亚历山大市主要污水排放口附近的一个小海湾（El-Max海湾）的八个不同地点收集了地表水和地下水样品。结果表明浓度随区域和季节变化而变化很大。研究表明，pH值处于正常范围，海湾内的pH值为8.0-8.5，El-Umum排水的pH值为7.5-7.7。在海湾的表层和底水之间观察到很大的差异，其盐度，溶解氧，可氧化有机物，总硬度和总碱度分散在（3.33-2.73实际盐度单位）（0.42-8.27 mg）范围内O_2 / l），（0.12-10.49 mg / l），（1.39-8.99 mg / l）和（0.23-0.48 mg / l）。海湾水体中LAS浓度的区域变化表明，浓度随着距排水源（El-Umum Drain）的距离而降低。 LAS的季节平均变化表明，夏季和春季在表层（0.13±0.04 mg LAS / l）和底层（0.12±0.10 mg LAS / l）的浓度最高，这归因于人口密度的增加和人类活动。总LAS浓度与盐度，溶解氧和钙离子浓度之间呈反比关系，分别为r = -0.78、0.50和0.67。这与未处理的含有去污剂的废水的发生，表面活性剂的生物降解率以及LAS作为Ca的强沉淀有关。

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