Toxicity evaluation of textile dyeing effluent and its possible relationship with chemical oxygen demand
| Autor: | Jieying Liang, Haili Cai, Jian Song, Jie Lu, Xun-an Ning, Yanxiang Hong, Jian Sun |
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| Rok vydání: | 2018 |
| Předmět: |
China
Health Toxicology and Mutagenesis Industrial Waste 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Waste Disposal Fluid Clarifier Water Purification Ammonia Effluent 0105 earth and related environmental sciences Biological Oxygen Demand Analysis Chemistry Chemical oxygen demand Public Health Environmental and Occupational Health Phosphorus General Medicine Sedimentation 021001 nanoscience & nanotechnology Pulp and paper industry Pollution Oxygen Volatile suspended solids Textile Industry Toxicity Sewage treatment 0210 nano-technology Water Pollutants Chemical |
| Zdroj: | Ecotoxicology and environmental safety. 166 |
| ISSN: | 1090-2414 |
| Popis: | Textile dyeing wastewater was the focus of much research because of its adverse effect on aquatic biota. In the present research, textile dyeing influent and effluent samples were collected from four textile dyeing wastewater treatment plants (TDPs) in Guangdong province, China, and their conventional indicators and toxicity were examined to reveal relationships. The relationship between toxicity and chemical oxygen demand (COD) was clearly established at individual TDPs. Results indicated the highest removal efficiencies of 94.4%, 90.6%, 91.9%, 94.6%, 92.8% and 97.5% for TOC, mixed-liquor volatile suspended solids (MLVSS), COD, ammonia nitrogen (NH3-N), total phosphorus (TP) and colour, respectively. The primary clarifier used in TDP3 and TDP4 was beneficial for removing macromolecular organic substances, and membrane filtration and sedimentation basin employed at TDP1 and TDP2, respectively, helped to remove toxic substances. Toxicity to V. fischeri or D. subspicatus was found to be related to certain conventional indicators such as TOC, COD, TP, colour, and MLVSS, and was positively correlated with COD in different textile dyeing effluents (R2 > 0.84). It was recommended that the relationship between toxicity and COD in wastewater should be established individually at each plant. Therefore, this study could be useful in providing suggestions for guiding effluent management when no toxicity experiments were conducted. |
| Databáze: | OpenAIRE |
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