Regeneration of Exhausted Chrome Tanning Solutions from Leather Production as a Method Preventing Environmental Pollution with Chromium

Панов, В. П.; Gyul'khandan'yan, E. M.; Pakshver, A. S.

doi:10.1023/b:rjac.0000012670.09621.44

Cited by 8 publications

(3 citation statements)

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“…After tanning of the hide (skin after removal of the hair side), 22-35% of the chrome tanning agent remains in the exhausted tanning solutions, which corresponds to a residual chromium concentration of 3-8g/l (recalculated to Cr 2 O 3 ) (Panov, Gyul'khandan'yan, & Pakshver, 2003). For instance, in India alone about 2000-3000tons of chromium escapes into the environment annually from tannery industries, with chromium concentrations ranging 2000-5000 mg/l in the aqueous effluent, compared to the recommended permissible discharge limits of 2mg/l (Altaf, Masood, & Malik, 2008).…”

Section: Literature Reviewmentioning

confidence: 99%

The Reduction of Bod, Cod and Chrome in the Tanning Wastewater

Nugroho

2018

mijst

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The tannery industry generally uses chrome raw materials in its tanning process. This use results in liquid waste containing chromium. This study aims to determine and analyze the characteristics of the waste from the exhausted chromed tanning process. The material used are sheep skins, which is tanned using conventional methods and the exhausted chrome tanning process. The collected liquid waste is then tested on the parameters of BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), and total chrome. The results of this test are then analyzed using Independent Sample T-Test, which revealed that the use of the exhausted chromed tanning process is capable of producing waste with lower total value of chromium, BOD, and COD, than that of with conventional method. However, those results are still above the applicable wastewater quality standards, so it still requires further processing in order to meet the requirements in Indonesia.

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Section: Literature Reviewmentioning

confidence: 99%

The Reduction of Bod, Cod and Chrome in the Tanning Wastewater

Nugroho

2018

mijst

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“…The major sources of chromium pollution are chrome ores, stainless steel industries, ferro-chrome production, ore refining, chemical and refractory processing, manufactures of alloys, wood preservatives, photographic sensitizers, mordents and pigments for rubber and ceramics (Sexana et al, 1990;Khalil et al, 1991;Panov et al, 2003). Tanneries are one of major source of chromium contamination in Pakistan.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Mediated Bio-degradation of Chromium Cr(VI) and Relative Effects of Varying Temperature and pH on Degradation Potential

Hanif¹

2020

LGUJLS

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During present study, three bacterial strains viz; Brevibacterium, Ochrobacterium intermedium and Bacillus cereus were isolated from tanneries and electroplating industrial effluents from Kasur, Pakistan and were screened and utilized for In-vitro bio-degradation of toxic chromium. Different temperature and pH ranges were investigated for maximum chromium reduction. Ochrobacterium intermedium was found to be more efficient in reduction of Cr (VI) to Cr (III) as compared to B. cereus and Brevibacterium. The growth responses of bacterial strains to environmental stresses were also observed.

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“…In the present work, there are three ways to deal with chromium waste liquid: Fenton oxidation, enzymatic degradation, and flocculation. The Fenton oxidation not only allows separating the suspended substances without affecting the form of chrome but also results in partial decomposition of the organic impurities in the chromium waste liquid [15,16]. Enzymes are typical agents of green technology.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Recovering High-Purity Chromium and Removing Organic Pollutants from Tannery Effluent

Zong

Yan-chun

Kang

2016

Journal of Chemistry

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Chromium pollution is a serious issue because of carcinogenic toxicities of the pollutants and low recovery rate of chromium because of the presence of organic, such as protein and fat. In this work, high recovery rate and high purity of the chromium ion were successfully prepared by the way of acid enzyme, flocculant, and Fenton oxidation. The experiments were characterized by TG, TOC, UV-VIS, and SEM. In the work, the tannery waste chrome liquor was used as experimental material. The results showed that the percentage of reduction of TOC in the tannery waste chrome liquor by method of Fenton oxidation, acid enzyme, and the flocculant was 71.15%, 65.26%, and 22.05%, respectively. Therefore, the organism content of chrome tanning waste liquid was greatly reduced through the pretreatment. And the application experiment showed that the properties and grain surface and fibers of the tanned leather with commercial chromium powder and chrome tanning agent prepared from the chromium waste liquid treated with Fenton are nearly the same.

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Regeneration of Exhausted Chrome Tanning Solutions from Leather Production as a Method Preventing Environmental Pollution with Chromium

Cited by 8 publications

References 1 publication

The Reduction of Bod, Cod and Chrome in the Tanning Wastewater

The Reduction of Bod, Cod and Chrome in the Tanning Wastewater

Bacterial Mediated Bio-degradation of Chromium Cr(VI) and Relative Effects of Varying Temperature and pH on Degradation Potential

Simultaneously Recovering High-Purity Chromium and Removing Organic Pollutants from Tannery Effluent

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