Scholarly record
STUDY OF BIODEGRADATION OF LEATHER TANNING WITH CHROMIUM AND VEGETAL COMPOUNDS
Abstract
Unsustainable consumption and production pa tterns in the developed world have an increased generation of waste over many decades. One of the major environmental challenge is the enormous amount of waste generated from leather and footwear industries. The leather and footwear industr ies are diverse manufacturing sectors which employ a wide variety of materials to make products ranging from different types and styles of clothes and footwear. Over 40 di fferent materials can be used but leather represents the most used material. The leather is produced by tanning process and chromium or vegetal compounds can be used as tanning agents. However, chromium represents a highly toxic element suspec ted to be carcinogen and thus a major environmental issue. In the last years many methods for tanning process have been developed that use vegetal materials. The aim of this paper is to develop a comparative study regarding biodegradation in aqueous solution in aerobic condition of leat her tanning with chromium and vegetal compounds, and to assess the compliance with conformity criteria specific for leather waste capitalization by biodegradation in aqueous medium and aerobic conditions for a 100 days period. A mixture of nutritive salts c ontaining K, N, P, Na, Ca, and the leather as carbon source, while the inoculums is th e liquid extract of compost from leather waste disposal. In system was bubbling air fr ee of carbon dioxide, the rate flow varied between 1.5-2.5 L/s, at constant temperature 20В±0.5В°C. A series of parameters have been monitored: carbon dioxide resulted, pH, conductivity, TOC (total organic carbon) and TON (total organic nitrogen) in liquid phase.
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References17
Abhay S. D. R. Enzymes and biotechnol ogy for cleaner leather processing, Current Science 96(11), pp 1439-1440, 2009.
Deselnicu V. & Albu L. Tehnologii moderne de prelucrare a pieilor si blanurilor, Ed. Certex, Bucharest, Romania, pp 12-38, 2007.
IFC, International Fina nce Corporation, Environmental, Health, and Safety Guidelines. Tanning and Leather finishing, april 30, 2007.
Leonard, A. The mutagenic and genotoxic effects of the heavy metals, in Proc. Int. Conf. Heavy Metalsin the Environmental, CEP Consultants, Edinburgh, 700, 1983.
Zerdani I. & Faidi M. & Malkim A. Digestion of Solid Tannery Wastes by Strains of Bacillus Sp Isolated From Compost in Morocco, International Journal of Agriculture & Biology, 6(5), pp. 758-761, 2004.
94/62/CE European Directive of 20 December 1994 on packaging and packaging waste. STAS 7308-87 – Vinyl polychloride – ash determination.
STAS 7798-67 – Plastic materials - Vinyl polychloride – water and volatile substances determination.
SR EN 13137-05 – Characterization of waste, determination of total organic carbon, (TOC), in waste, sludge and sediments.
SR EN ISO 14852 – 05 Plastic mate rials final aerobic biodegradability determination, in aqueous medium. Method by analysis of the evolved CO2 gas.
SR EN 13432-02 Packaging - Requirements for packaging recoverable through composting and biodegradation. Test sche me and evaluation criteria for the final acceptance of packaging
SR EN ISO 14855-05 Determination of the ultimate aerobic biodegradability and disintegration of plastic ma terials under controlled com posting conditions. Method by analysis of evolved carbon dioxide
SR EN ISO 14851-Determination of th e ultimate aerobic biodegradability of the plastic material in an aqueous medium. Method by measuring the oxygen demand in a closed respirometer.
SR EN ISO 20200-06 Plastics. Determination of the degree of disintegration of plastic materials under simulated composting conditions in laboratory scale test.
SR EN ISO 4684 – 06.Leather. Determination of the extractible substance.
SR EN ISO 4048-08 Leather. Determination of the extractible substance
SR ISO 10048-02. Water quality. Determin ation of nitrogen. Catalytic digestion after reduction with Devarda´s alloy.
SR EN ISO 4048-08. Leather. Determination of the free fat acids. ISO 15985-07, Plastics. Determination of th e ultimate anaerobic biodegradation and disintegration under high-solid s anaerobic-digestion conditi ons-Method by analysis of released biogas. Corresponding author: Irina Meghea: [email protected]
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