Evaluation of pollution potential and bioremediation of tannery-based chromium wastes in Sub-Saharan Africa: the case of dump sites in Beit Ore Tannery in South Africa and Dogbone Tannery in Kenya
type: CreativeWork
description: The leather tanning technology is one of the oldest industry in humankind’s civilisation history. It converts raw hides and skins into non-putrescible products used in making various leather materials. Globally, Africa accounts for 4% of the world leather production and 3.3% of value addition in leather industry. This value addition, has been accompanied with varied nature and large magnitude of tannery chromium effluent and solid wastes discharge from leather manufacturing. Leather processing wastes are now becoming of great environmental and public health concern in the world but more seriously in Sub Saharan Africa. This study aimed first at investigating chromium status, trace metals contamination and ecological risk assessment of tannery waste disposal of selected tannery waste dumpsites in Kenya and South Africa. Then, it assessed the potential health risk associated with the consumption of edible vegetables grown on Cr (VI) polluted soils. It further investigated the anaerobic bacterial profile of donkey dung assisted anaerobic bioreactor remediation of tannery based chromium wastes. Preliminary study of the use of donkey dung as a sorbent for Cr (VI) sequestration was also performed. This study was carried out in Dogbone (DB) and Beit Ore (BO) tanneries in Kenya and South Africa, respectively. Sampling for soils was done twice to accommodate two major seasons. The dumpsites soil was sampled at a depth of 10 - 20 cm for physico-chemical and heavy metals content analyses in both dumpsites in February, March, July and December of 2018. Wastewater samples were collected between February and March of 2018 at both tanneries. The following plants were sampled at BO dumpsites; Spinacea oleracea, Dactyloctenium aegyptenium, Cynodon dactylon, Alternanthera caracasana, and Corchorus tridens. In DB dumpsites; Amaranthus dubius Thell, Cynodon nemfluensis vanderst and actyloctenium aegyptenium were sampled. The donkey dung used in this study was obtained from Vuwani villa…
abstract: The leather tanning technology is one of the oldest industry in humankind’s civilisation history. It converts raw hides and skins into non-putrescible products used in making various leather materials. Globally, Africa accounts for 4% of the world leather production and 3.3% of value addition in leather industry. This value addition, has been accompanied with varied nature and large magnitude of tannery chromium effluent and solid wastes discharge from leather manufacturing. Leather processing wastes are now becoming of great environmental and public health concern in the world but more seriously in Sub Saharan Africa. This study aimed first at investigating chromium status, trace metals contamination and ecological risk assessment of tannery waste disposal of selected tannery waste dumpsites in Kenya and South Africa. Then, it assessed the potential health risk associated with the consumption of edible vegetables grown on Cr (VI) polluted soils. It further investigated the anaerobic bacterial profile of donkey dung assisted anaerobic bioreactor remediation of tannery based chromium wastes. Preliminary study of the use of donkey dung as a sorbent for Cr (VI) sequestration was also performed. This study was carried out in Dogbone (DB) and Beit Ore (BO) tanneries in Kenya and South Africa, respectively. Sampling for soils was done twice to accommodate two major seasons. The dumpsites soil was sampled at a depth of 10 - 20 cm for physico-chemical and heavy metals content analyses in both dumpsites in February, March, July and December of 2018. Wastewater samples were collected between February and March of 2018 at both tanneries. The following plants were sampled at BO dumpsites; Spinacea oleracea, Dactyloctenium aegyptenium, Cynodon dactylon, Alternanthera caracasana, and Corchorus tridens. In DB dumpsites; Amaranthus dubius Thell, Cynodon nemfluensis vanderst and actyloctenium aegyptenium were sampled. The donkey dung used in this study was obtained from Vuwani villa…
author: Ongong, Richard Oruko
language: en
keywords: Adsorption of Cr (VI), Anaerobic biorectors, Bioremediation technique, Ecological pollution, Edible vegetables, Equus africanus asinus dung, Potential health risks, Removal of chromium
date published: 2022-07-15
date modified: 2026-07-27T21:57:42Z
provider: University of Venda
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Venda

PropertyValue
property ID: Handle
value: http://hdl.handle.net/11602/2281