Quantitative Assessment of Some Toxic Elements and Physicochemical Parameters in Wastewater of Dyeing Industry: A Case Study

IF 0.4 Q4 CHEMISTRY, ANALYTICAL

Pakistan Journal of Analytical & Environmental Chemistry Pub Date : 2020-06-28 DOI:10.21743/pjaec/2020.06.16

G. M. Channa

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引用次数: 6

Abstract

--------------------------------------------------------------------------------------------------------------------------------------------Abstract The current study aims to examine the concentration of some toxic elements such as, cadmium (Cd), chromium (Cr), lead (Pb) and nickel (Ni) and physicochemical parameters such as electric conductivity (EC), pH, total dissolved solids (TDS), and biological oxygen demand (BOD) in the wastewater of dye manufacturing, textile dyeing, and small dyeing industries. The concentrations of Cd, Cr, and Ni in wastewater samples of these industries were significantly higher than the permissible limits set by WHO for toxic metals in industrial wastewater. The highest level of EC was observed in wastewater samples of the small dying industry as compared to the other two types of industries. The BOD of the investigated wastewater samples was almost two to three-times exceeded than the suggested threshold level recommended by EPA for industrial wastewater. The elevated BOD levels might be due to the presence of the excess level of organic matter in wastewater discharged from the various activities of industries.

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印染废水中有毒元素及理化参数的定量评价——以印染废水为例

-------------------------------------------------------------------------------------------------------------------------------------------- 抽象当前的研究旨在检验等有毒元素的浓度,镉(Cd)、铬(Cr)、铅(Pb)和镍(镍)和电导率等物理化学参数(EC)、pH值、总溶解固体(TDS),生化需氧量(BOD)的废水染料制造、纺织印染、以及小型印染工业。这些工业废水样品中Cd、Cr和Ni的浓度明显高于世界卫生组织对工业废水中有毒金属规定的允许限度。与其他两种类型的工业相比，在小型印染工业的废水样品中观察到的EC水平最高。所调查的废水样品的BOD几乎超过了EPA建议的工业废水阈值水平的两到三倍。BOD水平升高可能是由于各种工业活动排放的废水中存在过量的有机物。

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