National Horticultural Research Institute, Jericho Reservation Area, Idi-Ishin, P.M.B.5432, Dugbe Post Office, Ibadan, Nigeria.
Department of Agricultural and Environmental Engineering, Faculty of Technology, University of Ibadan, Ibadan, Nigeria.
Environ Sci Pollut Res Int. 2018 Aug;25(22):21915-21926. doi: 10.1007/s11356-018-2295-5. Epub 2018 May 24.
We present a modelling concept for evaluating the impacts of anthropogenic activities suspected to be from gas flaring on the quality of the atmosphere using domestic roof-harvested rainwater (DRHRW) as indicator. We analysed seven metals (Cu, Cd, Pb, Zn, Fe, Ca, and Mg) and six water quality parameters (acidity, PO, SO, NO Cl, and pH). These were used as input parameters in 12 sampling points from gas-flaring environments (Port Harcourt, Nigeria) using Ibadan as reference. We formulated the results of these input parameters into membership function fuzzy matrices based on four degrees of impact: extremely high, high, medium, and low, using regulatory limits as criteria. We generated indices that classified the degree of anthropogenic activity impact on the sites from the product membership function matrices and weight matrices, with investigated (gas-flaring) environment as between medium and high impact compared to those from reference (residential) environment that was classified as between low and medium impact. Major contaminants of concern found in the harvested rainwater were Pb and Cd. There is also the urgent need to stop gas-flaring activities in Port Harcourt area in particular and Niger Delta region of Nigeria in general, so as to minimise the untold health hazard that people living in the area are currently faced with. The fuzzy methodology presented has also indicated that the water cannot safely support potable uses and should not be consumed without purification due to the impact of anthropogenic activities in the area but may be useful for other domestic purposes.
我们提出了一个建模概念，用于评估疑似来自天然气燃烧的人为活动对大气质量的影响，使用国内屋顶收集的雨水（DRHRW）作为指标。我们分析了七种金属（Cu、Cd、Pb、Zn、Fe、Ca 和 Mg）和六种水质参数（酸度、PO、SO、NO Cl 和 pH）。这些被用作来自天然气燃烧环境（尼日利亚哈科特港）的 12 个采样点的输入参数，伊巴丹作为参考。我们根据四个影响程度（极高、高、中、低），将这些输入参数制定成隶属函数模糊矩阵，以监管限制为标准。我们从产品隶属函数矩阵和权重矩阵生成了指数，对站点的人为活动影响程度进行了分类，与参考（住宅）环境相比，调查（天然气燃烧）环境被归类为中到高影响，而参考环境被归类为低到中影响。在收集的雨水中发现的主要关注污染物是 Pb 和 Cd。还需要紧急停止哈科特港地区特别是尼日利亚尼日尔三角洲地区的天然气燃烧活动，以尽量减少该地区居民目前面临的无法言喻的健康危害。提出的模糊方法还表明，由于该地区人为活动的影响，水不能安全地支持饮用水用途，在没有净化的情况下不应消费，但可能对其他家庭用途有用。
