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, when tens of thousands of china's factories were forced to close and undergo environmental inspections. overall, as much as % of china's denim-dyeing chemical capacity has been shuttered, cheng says, equal to roughly % of global capacity. and that's why his phone was ringing. intech, headquartered
, creating large amounts of wastewater. all told, about l of water is used to produce kg of fabric. a review of wastewater treatment steps found that textile effluent contains high concentrations of dyes and chemicals, including chromium, arsenic, copper, and zinc. dyes and chemicals released into waterways...
https://cen.acs.org/business/consumer-products/new-textile-dyeing-methods-make/96/i29