English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Solid tannery waste from the Hazaribagh area in the outskirts of Dhaka city is used as the principal component of poultry feed, fish feed and fertilizers. Although total chromium content in tannery waste based poultry feed has been determined previously, no studies appear to have been made on the hexavalent chromium which is much more toxic than trivalent chromium and is a carcinogen. The USEPA method 3060A which involves alkaline digestion to prohibit inter-conversion of Cr (III) and Cr (VI) has been used to solubilize chromium from the samples. The well-established spectrophotometric method (EPA method 7196A) has been employed to measure Cr (VI) concentrations at 540 nm in different samples. A total of 42 samples including solid leather waste, poultry feed, chicken livers and eggs were analyzed. Out of 5 skin-cuts two have shown the presence of Cr (VI). The amounts of Cr (VI) that have been found in 6 of the poultry samples are significantly higher (except one) than those found in skin-cut samples. About 25% of the chicken liver has been found to contain Cr (VI). It is reasonable to assume that this has come from the poultry feed.

Hexavalent Chromium in Tannery Solid Waste Based Poultry Feed in Bangladesh and Its Transfer to Food Chain