Summary
The article is brief the origin that showed chromic pollution and harm, and the main method that handles tervalent chromium: Emphasize elaborated biology adsorption technology; According to experimental result, reach its first-rate moving parameter is: When PH the value is 6 when, adsorptive effect is best, oscillation 60min adsorption can amount to a balance basically. It is to be below normal temperature commonly. Common and ionic Na, ca2, mg2, cl- , wait to be affected to adsorption not quite. Freundlich and model of Langmuin isothermal adsorption are accorded with to the adsorption of tervalent chromium in the microzyme inside certain chroma limits.
Keyword: Microzyme, tervalent chromium, biology adsorption
The harm of 1. chromium
Chromic (Cr) spread all over at nature, all contain the chromium of minim in water system and air. Chromium has a variety of valence condition, among them only tervalent chromium and 6 price chromium have biology meaning. Chromium is the microelement with indispensible human body, it and fat kind metabolization has close tie, can increase the cholesterol inside human body decompose and excrete, it is an active ingredient in factor of energy of the dextrose inside airframe, can auxiliary insulin uses dextrose. If food cannot offer enough chromium, the person experiences occurrence chromium to lack disease, influence saccharide and fat kind metabolization. If many chromium pollutes an environment, endanger human body health. Chromic valence condition is different, the efficiency that human body absorbs chromium is different also, gastric bowel way is right the absorptance of tervalent chromium 6 price chromium is low, 6 price chromium is below condition of acidity of gastric bowel path but reductive for tervalent chromium, absorb chromium to be able to cause apparent save up inside body in great quantities.
Chromium is toxic and main it is to show 6 price are chromic. 6 price chromium and noxiousness are controlled 100 times higher than tervalent chromium. Tervalent chromium and 6 price chromium have deadly action to aquatic biology. Chromium is accumulated inside piscine body. Tervalent chromium compares 6 price chromium to fish harm big. The experiment makes clear, chromium is contained to be when 1ppm in water, can stimulate aquatic content to grow, can make when 1 ～ 10ppm aquatic biology grows suffer restrain, when achieving 100ppm, make aquatic biology grows almost completely stop, on the edge of death. Because invade a way to differ, clinical expression is different also. Drinkable the water that industrial waste water pollutes the chromium that be contained, can send abdomen unwell reach the toxic symptom such as diarrhoea; Chromium reacts for skin allergy former, cause irritability dermatitis or eczema, the feature of eczema shows small more, coin shape, with inferior fast performance is given priority to, show erythema, soak, oozy, take off bits, course of diseases to grow, long and do not heal; Enter by breath, aculeate to respiratory tract stimulate and corrode action, cause rhinitis, pharyngitis, bronchitic, serious when make nasal septum debaucjed, perforative even. Chromium still sends cancerous gene.
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