Search Result of "Bussarin Kongseri"

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ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Cyanide Removal from Laboratory Wastewater Using Sodium Hypochlorite and Calcium Hypochlorite)

ผู้เขียน:Imgดร.นุษรา สินบัวทอง, ImgBussarin Kongseri, ImgPanadda Plungklang, ImgRoj Khun-anake



Removal of cyanide (CN-) from laboratory wastewater using sodium hypochlorite (NaOCl) and calcium hypochlorite (Ca(OCl)2) were performed at the reaction time of 30 minutes. The product of chlorination at an alkaline pH of 12.3 was CNO - which could be oxidized further to N2. Colorimetric method was used to determine the amount of CN- before and after chemical treatments. The optimum doses of chemicals used were determined. It was found that 100% removal of this contaminant could be achieved. The optimum doses and chemical costs of NaOCl and Ca(OCl)2 varied depending on the initial cyanide concentration. The optimum doses of NaOCl and Ca(OCl) 2 for 100% CN- removal were Y = 17.3X and Y = 3.32 X, respectively (where X = initial CN- concentration in mg/l, and Y = chemical dose in mg/l). The chemical costs of NaOCl and Ca(OCl) 2 were Y = 0.69 X and Y = 0.50X, respectively (where X = initial CN- concentration in mg/l, and Y = cost, baht/m3 of wastewater). Ca(OCl)2 is more effective than NaOCl considering the cost and dosage used.

Article Info
Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 034, Issue 1, Jan 00 - Mar 00, Page 74 - 78 |  PDF |  Page