两性离子角蛋白对皮革染色加脂废液的絮凝作用及絮体的回用

Flocculation Effect of Amphoteric Keratin on the Leather Dyeing Fatliquoring Wastewater and Reusing the Flocs

摘要:

将皮革厂废牛毛提取的角蛋白与3-氯-2-羟丙基三甲基氯化铵和氯乙酸钠反应，制备出了一种两性离子角蛋白，研究了其对皮革染色加脂废液的絮凝作用，考察了投加量、pH值及絮凝时间对CODcr和总Cr去除率的影响。结果表明：投加量为0.5g稬-1，pH值为4，絮凝时间为4h时，絮凝效果最好，废液中的CODCr从18840mg稬-1降至3600mg稬-1，总Cr含量从19.022mg稬-1降至1.277mg稬-1，且脱色效果明显。将絮体经过适当处理后应用于铬鞣坯革的填充,结果表明：絮体填充坯革后，坯革增厚率达7.32%，抗张强度有和断裂伸长率所提高，同时能够对皮革纤维起到良好的分散作用，可见絮体的回收利用是可行且有效的。

Abstract:

Amphoteric Keratin was made by 3-chloro-2-hydroxypropyl trimethyl ammonium chloride and sodium chloroacetate.And study the Flocculation Effect on the Leather Dyeing Fatliquoring Wastewater in this paper.Laboratory work has been carried out to investigate the influences of amphoteric keratin dosage, pH value and flocculation time on the removal rate of CODcr and total Cr efficiency. Results showed that:when the flocculent dosage was 0.5g稬-1,pH 4.0 and flocculation time was 4h, removal of CODcr and total Cr from 18840mg稬-1,19.0225mg稬-1 to 3600mg稬-1 and 1.277mg稬-1,as well as the decolorization effect is obvious. The flocs were used to fill the chrome tanned leather after proper treatment.The results showed that the thickening rate was 7.32%,the tensile strengthen was strenghten as well as the elongation at break had good effect. what’s more ,it plays a good dispersion on the lether fibers and the reusing flocs are practial and effective.