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Results for “Chromium Compounds”

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PubMed2003

[Studies on the effects of chromium complexes].

The existence of chromium complexes in nature, their industrial uses, and their health impacts were reviewed in this paper. The toxic and the formation of Cr(V/IV) complexes and the mechanisms of DNA damage were discussed in particular. The major damaging species responsible for the genotoxicity were Cr(V) or Cr(IV) complexes. However, the function of reactive organic intermediates could not be excluded.

Chromium↗
PubMed1977

[Lymphocyte transformation test in the diagnosis of occupational allergy (author's transl)].

In 139 persons occupationally exposed to compounds of chromium, formaldehyde and p-phenylenediamine lymphocytic transformation test (ltt) was performed to detect a delayed-type hypersensitivity. In patients suffering from either contact dermatitis or allergic respiratory diseases the findings of ltt were concordant only in about one third of the cases in comparison to patch testing, intracutaneous test, nasal provocation or inhalation test.

Chromium↗
PubMed2004

[Treatment of wastewater containing Cr(VI) by LDH synthesizing in situ].

The objective of this work was to investigate the efficiency and factors impacting of removal Cr(VI) from wastewater by layer double hydroxide synthesizing in situ. Principle of the method may be described as follow: Mg2+ and Al3+ hydrolysis and forms Mg/Al-LDH by adding Mg2+, Al3+ and NaOH into wastewater containing Cr(VI), Cr(VI) anions are selectively intercalated into interlayer of LDH to balance positive structural charge. While Mg2+ and Al3+ co-precipitates and forms LDH, the Cr(VI) in wastewater is removal by settle of LDH synthesizing in situ, which are confirmed by analysis of X-ray diffraction on settle and chemical analysis on aqueous. The results indicate that factors of impacting on efficiency of removal Cr(VI) include in amount of adding Mg2+ and Al3+, Mg/Al ratio, pH and concentration of Cr(VI) in wastewater. The maximal removal efficiency of Cr(VI) can be reached when pH values are between 8.5 and 9, and Mg/Al ratios are between 1:1 and 2:1, meanwhile, Mg and Al added can be taken good use of. This technology has present extraordinary efficiency of wastewater treatment.

Aluminum↗