尼日利亚米纳选定汽车车间周围土壤理化性质及部分重金属的测定

Nwakife C.N., Esther U., M. M., A. A, Morah E.J., I. A
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引用次数: 1

摘要

汽车车间产生含有危险化学物质的废物。这些车间中存在的重金属是洪水期间能够渗入土壤并进一步扩散到附近其他环境的主要污染物。三个不同的采样点(A, B和C)在每个汽车车间周围相隔20米的地方绘制:火车站(RW), Sabon gari (SBG)和Mypa学校(MY)。用HNO3和HClO4(3:1)对土壤样品进行预处理和消化。采用多等离子体原子发射分光光度计(MP AES)测定重金属Zn、Mn、Pb、Cd和Cu的浓度。采用标准分析方法测定了土壤的理化性质(pH、电导率、有机碳(OC)、有机质(OM)、交换阳离子、土壤质地、阳离子交换容量(CEC)、总交换碱(TEB)以及粘土、粉土和砂土的百分比)。MY A、B、C点Pb浓度分别为2.10±0.01、9.50±0.05和2.90±0.03 mg/kg,低于RW组的35.10±0.20、37.20±0.21和46.50±0.54 mg/kg,低于SBG组的25.80±0.29、64.80±0.75和75.60±0.87 mg/kg。锌浓度的大小为MY < RW < SBG。RW A、B、C点镉浓度分别为3.20±0.20、3.70±0.02和3.40±0.02 mg/kg, MY土壤镉浓度分别为3.90±0.02、2.80±0.05和3.50±0.02 mg/kg。RW和RW的土壤中镉浓度高,表明污染严重,并且该地区的土壤不适合种植作物,但需要采取补救措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Determination of the Physicochemical Properties and Some Heavy Metals in Soils Around Selected Automobile Workshops in Minna, Nigeria
Automobile workshops generate wastes containing hazardous chemicals. Heavy metals present in these workshops are the major pollutants capable of seeping into the soil and further spreading to other nearby environments during floods. Three different sampling points (A, B and C) were mapped out at a distance of 20 meters apart around each automobile workshop: Railway station (RW), Sabon gari (SBG) and Mypa school (MY). The soil samples were pretreated and digested with HNO3 and HClO4 (3:1). The heavy metals (Zn, Mn, Pb, Cd and Cu) concentrations were determined using the multiple plasma atomic emission spectrophotometer (MP AES). The physicochemical properties (pH, electrical conductivity, organic carbon (OC), organic matter (OM), exchangeable cations, soil texture, cation exchange capacity (CEC), total exchangeable bases (TEB) and percentage clay, silt and sand) were determined using standard methods of analysis. The concentrations of Pb at points A, B and C of MY (2.10±0.01, 9.50±0.05 and 2.90±0.03 mg/kg) were lower than 35.10±0.20, 37.20±0.21 and 46.50±0.54 mg/kg at RW and 25.80±0.29, 64.80±0.75 and 75.60±0.87 mg/kg at SBG. Zinc concentration was in the order MY < RW < SBG. Cadmium concentrations were 3.20±0.20, 3.70±0.02 and 3.40±0.02 mg/kg at points A, B and C in RW, 3.90±0.02, 2.80±0.05 and 3.50±0.02 mg/kg in MY soil. The high concentration of cadmium in soils at RW and MY are indications of considerable contamination and the soils at MY and RW are not suitable for planting crops but require remediation action.
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