拉各斯州奥霍塔奥卢索松垃圾填埋场土壤及部分地下动物重金属浓度评价

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摘要

由于全球工业活动,重金属对生态系统的污染已成为最重要的生态和生物挑战之一。进行了一项实验性研究,以确定拉各斯州垃圾场土壤和选定地下动物中的重金属水平。使用螺旋钻在距离填埋场土壤表面0 -15cm深度处收集4个复合土壤样品,每个样品1 kg。测定了土壤pH、温度、土壤含水量等参数的水平。每个土壤样本中的蚯蚓、蛆和蜘蛛在蒸馏水中清洗,以去除土壤颗粒。然后用原子吸收分光光度法(AAS)分析重金属(Zn、Cd、Cr、Cu和Pb)。研究结果表明,填埋场土壤样品中Pb和Cd的平均浓度(分别为0.75mg/kg和0.1mg/kg)高于对照土壤样品和地下动物。结果还表明,蛆和蚯蚓的平均锌浓度(分别为0.31mg/kg和0.14mg/kg)高于填埋样和对照土样和蜘蛛。填埋土壤与地下动物重金属平均浓度比较无统计学意义。本研究未检测到铬(Cr)。研究认为,重金属具有高度的人为影响和持久性,并在环境中积累,构成严重的生态和健康挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An appraisal of Heavy Metal Concentration in Soil and Selected Subterranean Animals in Olusosun Landfill, Ojota, Lagos State
As a result of the global industrial activities, contamination of the ecosystem by heavy metals has given rise to one of the most important ecological and organismic challenges. An experimental study was performed to ascertain the levels of heavy metals in soil and selected subterranean animals in dumpsites in Lagos State. One (1) kg each of four composite soil samples at a depth of 0 -15cm from the soil surface within the landfill were collected using an auger. The level of parameters such as soil pH, temperature and soil moisture content were determined. Earthworm, Maggot and Spider from each sampled soil were washed in distill water to remove soil particles. The heavy metals (Zn, Cd, Cr, Cu and Pb) were then analyzed by Atomic Absorption Spectrophotometry (AAS). The result of the study showed that Pb and Cd had higher mean concentration (0.75mg/kg and 0.1mg/kg respectively) for the landfill soil sample compared to the control soil sample and subterranean animals. The result also showed that Maggot and Earthworm had higher means concentration of Zn (0.31mg/kg and 0.14mg/kg respectively) compared to the soil samples (landfill and control) and spider. The result was not statistically significant comparing the mean concentration of heavy metals on the landfill soil and the subterranean animals. Chromium (Cr) was not detected in the study. The study concluded that there is high anthropogenic influence and persistence of the heavy metals which accumulated in the environment and pose serious ecological and health challenges.
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