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An Assessment of Zinc Fluxes by Analyzing Monthly, Weekday, and Weekend Levels in a River
Clean - Soil Air Water ( IF 1.5 ) Pub Date : 2022-03-08 , DOI: 10.1002/clen.202100151
Pertiwi Andarani 1, 2 , Kuriko Yokota 3 , Takanobu Inoue 3 , Hardianti Alimuddin 2 , Nguyen Minh Ngoc 3
Affiliation  

Unlike other potentially toxic metals, zinc (Zn) is indispensable to life but also poses environmental risks to aquatic organisms. Aichi Prefecture has the Japan's fourth-highest discharges of Zn into water bodies. It is likely that the Zn fluxes in Aichi's water bodies originate from industrial wastewater. This study evaluates the spatial-temporal and diel variability of Zn on sunny days during weekdays and weekends in the Umeda River. The most downstream point is considered as the most polluted section according to the monthly survey [dissolved Zn (D-Zn): 0.0046–0.0719 mg L−1, particulate Zn (P-Zn): 0.42–2.01 mg g−1] that varied between seasons (coefficient of variation: 95% for D-Zn; 53% for P-Zn). The total Zn (T-Zn) concentrations on weekdays (0.015–0.043 mg L−1) at the most downstream point exhibit much higher concentrations than those during the weekends (undetected–0.032 mg L−1). Given the dissolved phase of these Zn levels (77 ± 11%), the Zn are likely discharged by industrial facilities on weekdays. The T-Zn loading on weekdays (56 g km−2 d−1) is approximately three times higher than that on weekends. At least 67% of the T-Zn and 70% of the D-Zn fluxes from industrial point sources are potentially discharged on weekdays.

中文翻译:

通过分析河流中的每月、工作日和周末水平来评估锌通量

与其他具有潜在毒性的金属不同,锌 (Zn) 对生命来说是不可或缺的,但也会对水生生物构成环境风险。爱知县的水体锌排放量在日本排名第四。爱知县水体中的锌通量很可能来自工业废水。本研究评估梅田川平日和周末晴天时锌的时空变化和日变化。根据月度调查,最下游点被认为是污染最严重的部分[溶解锌(D-Zn):0.0046-0.0719 mg L -1,颗粒状锌(P-Zn):0.42-2.01 mg g -1 ]随季节变化(变异系数:D-Zn 为 95%;P-Zn 为 53%)。工作日的总锌 (T-Zn) 浓度 (0.015–0.043 mg L -1)在最下游点的浓度比周末高得多(未检测到–0.032 mg L -1)。鉴于这些 Zn 水平的溶解相 (77 ± 11%),Zn 很可能在工作日由工业设施排放。工作日的 T-Zn 负载量(56 g km -2 d -1)大约是周末的三倍。来自工业点源的至少 67% 的 T-Zn 和 70% 的 D-Zn 通量可能在工作日排放。
更新日期:2022-03-08
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