Sharjeel Abid, Sana Khalid, Muhammad Tauseef Khawar, Yasir Nawab, Shagufta Riaz
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引用次数: 0
摘要
据估计,纺织生产造成的染整产品污染约占全球清洁水污染的 20%。纺织废水排放是最有害的污染物之一,极有可能混入淡水水体,使清洁水体无法进一步利用。化学需氧量(COD)和生物需氧量(BOD)是描述水污染程度的重要指标。使用有害化学品对纺织品进行预处理会增加水的毒性,因为纺织品纤维表面的化学品会释放到清洁的饮用水中,污染水生环境。这项研究旨在建立纺织品传统预处理和生物预处理中所用助剂的化学需氧量和生化需氧量之间的相关性,以便追溯上游程序中使用的预处理方法对废水造成的影响。此外,还对传统工艺和酶法工艺的 COD 和 BOD 进行了比较。首先,对坯布进行退浆,然后是冲洗和漂白。然后,用传统方法和酶法进行冲洗和漂白,研究它们与废水中 COD 和 BOD 水平上升的关系。结果证实,纺织品传统处理和生物处理中使用的助剂对废水负荷有很大影响。然而,与传统预处理方法相比,酶预处理后的废水 COD 和 BOD 值大大降低。因此,在纺织品化学加工中应用酶法预处理有助于减少废水污染,促进可持续发展实践(可持续发展目标 6),减少对环境的影响。
Comparison between BOD and COD of auxiliaries used in conventional and enzymatic pretreatment of textiles polluting the aquatic environment
Textile production is estimated to be responsible for about 20% of global clean water pollution from dyeing and finishing products. Textile wastewater discharge is one of the most hazardous pollutants which has a strong possibility to be mixed with freshwater bodies making the clean water unfit for further utilization. Chemical oxygen demand (COD) and biological oxygen demand (BOD) are the important indicators that describe the pollution level of the water. Pretreatment of textiles using hazardous chemicals boosts the toxicity of water due to the release of chemicals from textile fibrous surfaces into clean drinking water polluting the aquatic environment. This research aimed to develop a correlation between COD and BOD concerning auxiliaries used in the conventional and bio-pretreatment of textiles, so that the wastewater load can be traced back to the pretreatment method applied in upstream procedures. Furthermore, a comparison was established between COD and BOD of conventional and enzymatic processes. At first, the desizing of gray fabric was done, followed by scouring and bleaching. Then, scouring and bleaching were performed by conventional and enzymatic methods to examine their association with the rise in COD and BOD levels of effluent. Results confirmed that auxiliaries used in traditional and bio-pretreatments of textiles are significantly responsible for wastewater load. However, COD and BOD values of effluent obtained after enzymatic pretreatments were substantially less compared to conventional pretreatment methods. Therefore, enzymatic pretreatment application in textile chemical processing will help reduce effluent pollution and promote sustainable practices (SDG 6) with less environmental impact.
Chemical PapersChemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍:
Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.