This work is aimed at giving emphasis on the present pollution condition in dyeing & printing industries of Bangladesh due to different textile pollutant. Though the economy of our country is increasing day by day due to medium and small-scale industrial activities, the toxic waste discharge is contributing severe pollution to the environment by this dyeing & printing industry. The liquid & solid effluents from different industries are causing a major destruction to the environment, ecology, agriculture, aquaculture and public health since the development of textile industries in the country. So, it is high time to give a break to the pollution and time it out gradually to save the river system. It had become a prerequisite to take required steps to mitigate the pollution problems in each industrial establishment, particularly at dyeing and printing industries that are discharging massive amount of liquid effluent to the rivers every day. Here various types of pollution which is created by the textile dyeing & printing industries are discussed and some suggestions including raw materials purchasing, Eco-friendly dyeing etc. are point out for mitigation.

With the improvement of living standards, everybody is very much conscious about the environmental protection and health safety. Natural dyes have attracted more attention to the industry due to exhibiting better biodegradability and more compatibility with the environment. Characteristic colours that are gathered from common assets can be categorized as either plant, creature, mineral, or microbial colours and can be used for colouring a wide range of regular filaments. Late examination shows that it can likewise be utilized to colour a portion of the manufactured filaments too. Normal colours are not just utilized in the shading of material filaments, they are also utilized for food, prescriptions, handiwork articles, and leather preparing. Extraction and purification play a vital role in the processing of natural dyes. There are different types of extraction process currently available for these natural dyes, such as solvent extraction, aqueous extraction, enzymatic extraction and fermentation, extraction with microwave or ultrasonic energy, supercritical fluid extraction, and alkaline or acid extraction. All these extraction processes have their own advantages as well as some drawbacks depending on the parameters that need to be maintained during the extraction process. Appropriate extraction can be beneficial for specific types of such dyes. In this paper, the classification, characteristics, extraction methods, and the application of natural dyes are introduced in an organized manner.