Analysis of Copper (Cu), Chromium (Cr), and Manganese (Mn) Levels from Liquid Waste of The Steel Industry with Atomic Absorption Spectrophotometry (AAS) Method

Syarifah Aini, Z. Alfian, H. Agusnar
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Abstract

Liquid waste from the steel industry processing, washing machine, and kitchenware foundry contained the elements of copper (Cu), chromium (Cr), and manganese (Mn). The effluent samples were destructed using concentrated HNO3. Then determined the concentration of the elements copper (Cu), chromium (Cr), and manganese (Mn) using an Atomic Absorption Spectrophotometer with a calibration curve. The results obtained for the level of copper (Cu) on the sample inlet was 0.9714 mg/L to 0.9719 mg/L, and the sample outlet was 3.9990 mg/L to 4.0002 mg/L. Levels of the element chromium (Cr) on sample inlet was 0.0295 mg/L to 0.0297 mg/L, the sample outlet was 0.0399 mg/L to 0.0400 mg/L. Meanwhile, the level of manganese (Mn) in the sample inlet was 0.1269 mg/L to 0.1271 mg/L in a sample outlet was 2.9699 mg/L to 2.9701 mg/L. Then the steel industry wastewater for elemental copper (Cu) and manganese (Mn) exceeded the limits that have been instituted by the Minister of Environment Decree No. 51, 1995, regarding the Liquid Waste Quality Standard for Industrial Activity.
原子吸收分光光度法分析钢铁工业废液中铜(Cu)、铬(Cr)和锰(Mn)的含量
来自钢铁工业加工、洗衣机和厨具铸造的废液含有铜(Cu)、铬(Cr)和锰(Mn)元素。用浓HNO3破坏出水样品。然后用带校准曲线的原子吸收分光光度计测定元素铜(Cu)、铬(Cr)和锰(Mn)的浓度。样品进口铜(Cu)含量为0.9714 ~ 0.9719 mg/L,样品出口铜(Cu)含量为3.9990 ~ 4.0002 mg/L。样品入口铬元素含量为0.0295 ~ 0.0297 mg/L,样品出口铬元素含量为0.0399 ~ 0.0400 mg/L。样品进口锰含量为0.1269 ~ 0.1271 mg/L,样品出口锰含量为2.9699 ~ 2.9701 mg/L。然后,钢铁工业废水中的单质铜(Cu)和锰(Mn)超过了1995年环境部长关于工业活动液体废物质量标准的第51号法令所规定的限制。
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