Chemical substances present in discharge water generated by laundry industry: Analytical monitoring

IF 3.7 Q1 WATER RESOURCES

Water science and engineering Pub Date : 2023-08-21 DOI:10.1016/j.wse.2023.07.004

Dario Lacalamita, Chiara Mongioví, Grégorio Crini

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Abstract

To our knowledge, precise data concerning the pollution in terms of qualitative and quantitative fluctuations in discharge water from the laundry sector have seldom been reported. This study investigated the chemical composition of the discharge water from a laundry industry. Over 160 chemical substances and 15 standard water parameters were monitored. The results showed that the discharge water presented both inorganic and organic polycontamination with a high degree of qualitative and quantitative variability. However, of all monitored substances, only five metals (Al, Cu, Fe, Sr, and Zn), five minerals (P, Ca, K, Na, and S), and alkylphenols were systematically present and quantifiable. For a daily average water flow of 129 m³, the released metal flux was 356 g/d. Substances, such as trichloromethane, brominated diphenyl ether (BDE) 47, and fluorides, were occasionally found and quantified. Other substances, such as chlorophenols, organo-tins, and pesticides were never identified. All the samples had quantifiable levels in the chemical oxygen demand (COD), biological oxygen demand (BOD), and hydrocarbons. Only the concentrations of Zn (8.3 g/d), Cu (21.4 g/d), and BOD (57.4 g/d) were close to or above the regulatory values: 74.0 g/d for Zn, 9.0 g/d for Cu, and 57.0 kg/d for BOD. The data obtained from this study are useful to the choice of additional treatments for the reduction of pollutant fluxes.

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洗衣工业排放水中的化学物质:分析监测

据我们所知，很少有关于洗衣部门排放的水在质量和数量上波动的污染的精确数据的报道。本研究对某洗衣厂排放水的化学成分进行了研究。监测了160多种化学物质和15种标准水参数。结果表明:排放水存在无机和有机双重污染，且具有高度的定性和定量变异。然而，在所有监测的物质中，只有五种金属(Al, Cu, Fe, Sr和Zn)，五种矿物质(P, Ca, K, Na和S)和烷基酚系统地存在并可量化。日均水流量为129 m3时，释放的金属通量为356 g/d。偶尔会发现一些物质，如三氯甲烷、溴化二苯醚(BDE) 47和氟化物，并加以量化。其他物质，如氯酚、有机锡和杀虫剂从未被发现。所有样品在化学需氧量(COD)、生物需氧量(BOD)和碳氢化合物中均具有可量化的水平。只有Zn (8.3 g/d)、Cu (21.4 g/d)和BOD (57.4 g/d)的浓度接近或高于调节值:Zn为74.0 g/d, Cu为9.0 g/d, BOD为57.0 kg/d。本研究所得的数据对选择减少污染物通量的其他处理方法是有用的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water science and engineering WATER RESOURCES-

CiteScore

6.60

自引率

5.00%

发文量

573

审稿时长

50 weeks

期刊介绍： Water Science and Engineering journal is an international, peer-reviewed research publication covering new concepts, theories, methods, and techniques related to water issues. The journal aims to publish research that helps advance the theoretical and practical understanding of water resources, aquatic environment, aquatic ecology, and water engineering, with emphases placed on the innovation and applicability of science and technology in large-scale hydropower project construction, large river and lake regulation, inter-basin water transfer, hydroelectric energy development, ecological restoration, the development of new materials, and sustainable utilization of water resources.