تأثیر سطوح مختلف دیتیونیت سدیم و زمان رنگبری بر ویژگیهای نوری، مکانیکی و COD مخلوط خمیرکاغذهای بازیافتی روزنامه و مجله باطله رنگبری شده

This research was conducted to investigate the bleaching of combined old newspapers (ONP) and old magazines (OMG) deinked pulp using sodium dithionite. The pulp was bleached using 0.5, 0.75, and 1% sodium dithionite and different times of 30, 60 and 90 minutes. The pulps were then refined to 300 ml,... View More