中国环境管理干部学院学报
中國環境管理榦部學院學報
중국배경관리간부학원학보
JOURNAL OF THE ENVIRONMENTAL MANAGEMENT COLLEGE OF CHINA
2013年
4期
55-57,77
,共4页
王小毛%王琦%欧伏平%符哲%连花
王小毛%王琦%歐伏平%符哲%連花
왕소모%왕기%구복평%부철%련화
催化剂行业废水%COD%氯离子%重铬酸钾法%氯气校正法%相对误差
催化劑行業廢水%COD%氯離子%重鉻痠鉀法%氯氣校正法%相對誤差
최화제행업폐수%COD%록리자%중락산갑법%록기교정법%상대오차
refinery wastewater%COD%chlorine ion%potassium dichromate method%chlorine rectification method%ARD
为了分析0.250 mol/L与0.025 mol/L重铬酸钾法测定炼油催化剂行业高氯废水COD的适用性,进行了比对实验。结果表明:两者测定结果相差60.5~76.8 mg/L;高浓度重铬酸钾法精密性较好, RSD%≤4.8%,准确度较高,与氯气校正法测定结果基本吻合,相对误差≤6%;低浓度的重铬酸钾法精密性相对较差, RSD%≥8.1%,与氯气校正法测定结果相对误差大于40%,准确度低。在控制稀释水样Cl-浓度500~800 mg/L范围时,采用重铬酸钾法测定COD,适宜于高浓度的方法。
為瞭分析0.250 mol/L與0.025 mol/L重鉻痠鉀法測定煉油催化劑行業高氯廢水COD的適用性,進行瞭比對實驗。結果錶明:兩者測定結果相差60.5~76.8 mg/L;高濃度重鉻痠鉀法精密性較好, RSD%≤4.8%,準確度較高,與氯氣校正法測定結果基本吻閤,相對誤差≤6%;低濃度的重鉻痠鉀法精密性相對較差, RSD%≥8.1%,與氯氣校正法測定結果相對誤差大于40%,準確度低。在控製稀釋水樣Cl-濃度500~800 mg/L範圍時,採用重鉻痠鉀法測定COD,適宜于高濃度的方法。
위료분석0.250 mol/L여0.025 mol/L중락산갑법측정련유최화제행업고록폐수COD적괄용성,진행료비대실험。결과표명:량자측정결과상차60.5~76.8 mg/L;고농도중락산갑법정밀성교호, RSD%≤4.8%,준학도교고,여록기교정법측정결과기본문합,상대오차≤6%;저농도적중락산갑법정밀성상대교차, RSD%≥8.1%,여록기교정법측정결과상대오차대우40%,준학도저。재공제희석수양Cl-농도500~800 mg/L범위시,채용중락산갑법측정COD,괄의우고농도적방법。
The suitability of COD determination by the potassium dichromate method in high chlorine content of dilution refinery wastewater sample was compared between using high ( 0.250 mol/L) and low ( 0.025 mol/L) concentrations. The differences between two concentrations of the determination results varied from 60.5 mg/L to 76.8 mg/L. The accuracy of result detected by high concentration potassium dichromate method ( RSD%≤4.8%) was close to what from chlorine rectification method (ARD≤6%). The accuracy of low concentration potassium dichromate method was lower (RSD%≥8.1%), with ARD above 40%compared to chlorine rectification method. When the chlorine ion content in dilution wastewater sample was controlled from 500 mg/L to 800 mg/L, the results were in good accuracy using high ( 0.250 mol/L) concentration potassium dichromate method.