Solid waste from leather industry as adsorbent of organic dyes in aqueous-medium

One of the biggest problems facing the leather industry is the production of solid waste with chromium. Dechroming process remove chrome from leather waste and it is designed to recover the value of collagen in the waste. Thus, the aim of this study was try to improve a methodology of dechroming process already described in the scientific literature, seeking to increase the percentage of dechroming ratio, as well as to evaluate the cytotoxic and genotoxic effects of the dechromed samples obtained from the leather residue for possible applications that require non-toxic materials based on collagens. As results, the dechroming process has been shown to be effective, with 99.29% of chromium removed from the shavings. In addition, it is possible to infer that the process of dechroming performed in this study was efficient in the neutralization step of hexavalent chromium and that the collagen from the leather residue did not shows cytotoxic and genotoxic effects for the evaluatedin vitrotest system. Therefore, this treatment allows to obtain a valuable product extracted from what was previously a hazardous waste.

Download Full-text

Zwitterionic superabsorbent polymer hydrogels for efficient and selective removal of organic dyes

RSC Advances ◽

10.1039/c9ra02488c ◽

2019 ◽

Vol 9 (32) ◽

pp. 18565-18577 ◽

Cited By ~ 7

Author(s):

Tanzil Ur Rehman ◽

Luqman Ali Shah ◽

Mansoor Khan ◽

Muhammad Irfan ◽

Noor Saeed Khattak

Keyword(s):

Free Radical ◽

Aqueous Medium ◽

Radical Polymerization ◽

Crystal Violet ◽

Congo Red ◽

Organic Dyes ◽

Selective Removal ◽

Superabsorbent Polymer ◽

Polymer Hydrogel ◽

Polymer Hydrogels

A novel zwitterionic superabsorbent polymer hydrogel [ZI-SAH] was synthesized by free radical polymerization and used for the removal of crystal violet (CV) and congo red (CR) from an aqueous medium.

Download Full-text

Preparation of light weight constructional materials from chrome containing buffing dust solid waste generated in leather industry

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-016-0494-z ◽

2016 ◽

Vol 19 (2) ◽

pp. 928-938 ◽

Cited By ~ 5

Author(s):

K. Sivaprakash ◽

P. Maharaja ◽

S. Pavithra ◽

R. Boopathy ◽

G. Sekaran

Keyword(s):

Solid Waste ◽

Light Weight ◽

Leather Industry

Download Full-text

Wet Blue Fiber and Lime from Leather Industry Solid Waste as Stabilizing Additive and Filler in Design of Stone Matrix Asphalt

Asian Journal of Research in Social Sciences and Humanities ◽

10.5958/2249-7315.2017.00547.0 ◽

2017 ◽

Vol 7 (11) ◽

pp. 240 ◽

Cited By ~ 1

Author(s):

C. Kamaraj ◽

S. Lakshmi ◽

C. Rose ◽

C. Muralidharan

Keyword(s):

Solid Waste ◽

Leather Industry ◽

Stone Matrix Asphalt ◽

Stone Matrix

Download Full-text

Study of the dechroming of tanned leather wastes

Hemijska industrija ◽

10.2298/hemind0402064b ◽

2004 ◽

Vol 58 (2) ◽

pp. 64-68

Author(s):

Tatjana Botic ◽

Nadezda Iliskovic ◽

Dijana Drljaca

Keyword(s):

Solid Waste ◽

Alkaline Hydrolysis ◽

Leather Industry ◽

Primary Target ◽

Initial Amount ◽

Economic Saving ◽

Tanning Process ◽

Leather Wastes ◽

Oxidation Agent ◽

Tanning Industry

According to European legislation, it is not possible to dump any chromium-containing waste in Europe. The minimization of wastes is a key element in that strategy. It involves the application of clean technologies: low and non-waste technologies. The tanning industry generates substantial quantities of chromium-containing solid waste in the form of shavings and trimmings. The recycling and reuse of those wastes must be the primary target in optimizing processes of the leather industry. The problem is in a satisfying chromium separation from collagen fibers. Common hydrolysis processes-alkaline or acidic-give gelatins containing residual chromium (III). By using an oxidation agent (H2O2) before alkaline hydrolysis, in was demonstrated that chromium from chromium-containing leather wastes can be almost fully recovered by the previous oxidation of Cr(III) to Cr(VI). This chromium can be reused in the tanning process. That would represent an economic saving. The best result of the dechroming process was a gelatin hydrolyzate with only 1.11 in respect to the initial amount.

Download Full-text