Scholarlink

<p>This research examined the water quality in the Asese/Mowe Industrial Area of Ogun State, Nigeria. Twenty (20) water samples comprising both surface and groundwater sources were obtained from industrial zones and subjected to comprehensive physicochemical analysis using standard procedures. The analytical parameters examined encompassed pH levels, electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), and principal anionic constituents (chloride (Cl⁻), sulphate (SO<sub>4</sub><sup>2</sup>⁻), and nitrate (NO<sub>3</sub>⁻)). Surface and groundwater quality analysis was evaluated using water quality index (WQI). 14 out of the evaluated 20 samples had pH below the minimum acceptable limit of 6.5, indicating that the water in many locations is slightly acidic. The COD values varied between 3.99 and 12.04&#xa0;mg/l, with a mean value of 7.09 (± 1.88) mg/l. SW1 exhibits a COD level of 12.04&#xa0;mg/L, which fails to comply with the required COD standards and consequently renders it unsuitable for drinking water consumption based on COD criteria. Results show that the WQI values for the 20 samples ranged between 6.83 and 106.73 reflecting noticeable variation in water quality across different sampling points. 45% of the water samples were categorised as good quality whilst 55% of the samples were deemed Poor for human consumption in their current condition. As a result, 55% of the overall water resources within the research region exhibit substandard quality characteristics and are deemed unsuitable for direct consumption, thereby necessitating pre-treatment processes before practical application. The WQI showed significant positive correlations with EC (r = 0.588), TDS (r = 0.603), BOD (r = 0.837), COD (r = 0.621), and Cl<sup>−</sup> (r = 0.589) at the <i>p</i> ≤ 0.01, and with SO<sub>4</sub><sup>2−</sup> (r = 0.549) at <i>p</i> ≤ 0.05. PC1 shows positive loadings for EC, pH, TDS, BOD, COD, Cl<sup>−</sup>, and SO<sub>4</sub><sup>2−</sup>, with DO showing negative loading. Most water sources in the Asese/Mowe area are good quality and safe for domestic and agricultural use. However, specific samples exhibited elevated contamination indicators and warrant continuous environmental monitoring to prevent future contamination. The results highlight the need for proactive groundwater management due to increasing urbanisation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Surface and groundwater quality characterization and assessment in Asese/Mowe industrial area, Southwestern Nigeria

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月30日

查看全文
  • Idowu Ezekiel Olorunfemi,
  • Jeremiah Adedapo Ajibade,
  • Omotayo Babawande Adeboye,
  • Abidat Olayemi Fasasi-Aleshinloye,
  • Ademola Mohammed Adeyemi,
  • Rasheed Ibrahim,
  • Oluwadamilare Oluwasegun Eludire

摘要

This research examined the water quality in the Asese/Mowe Industrial Area of Ogun State, Nigeria. Twenty (20) water samples comprising both surface and groundwater sources were obtained from industrial zones and subjected to comprehensive physicochemical analysis using standard procedures. The analytical parameters examined encompassed pH levels, electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), biological oxygen demand (BOD), chemical oxygen demand (COD), and principal anionic constituents (chloride (Cl⁻), sulphate (SO42⁻), and nitrate (NO3⁻)). Surface and groundwater quality analysis was evaluated using water quality index (WQI). 14 out of the evaluated 20 samples had pH below the minimum acceptable limit of 6.5, indicating that the water in many locations is slightly acidic. The COD values varied between 3.99 and 12.04 mg/l, with a mean value of 7.09 (± 1.88) mg/l. SW1 exhibits a COD level of 12.04 mg/L, which fails to comply with the required COD standards and consequently renders it unsuitable for drinking water consumption based on COD criteria. Results show that the WQI values for the 20 samples ranged between 6.83 and 106.73 reflecting noticeable variation in water quality across different sampling points. 45% of the water samples were categorised as good quality whilst 55% of the samples were deemed Poor for human consumption in their current condition. As a result, 55% of the overall water resources within the research region exhibit substandard quality characteristics and are deemed unsuitable for direct consumption, thereby necessitating pre-treatment processes before practical application. The WQI showed significant positive correlations with EC (r = 0.588), TDS (r = 0.603), BOD (r = 0.837), COD (r = 0.621), and Cl− (r = 0.589) at the p ≤ 0.01, and with SO42− (r = 0.549) at p ≤ 0.05. PC1 shows positive loadings for EC, pH, TDS, BOD, COD, Cl−, and SO42−, with DO showing negative loading. Most water sources in the Asese/Mowe area are good quality and safe for domestic and agricultural use. However, specific samples exhibited elevated contamination indicators and warrant continuous environmental monitoring to prevent future contamination. The results highlight the need for proactive groundwater management due to increasing urbanisation.