电镀与涂饰
電鍍與塗飾
전도여도식
ELECTROPLATING & FINISHING
2015年
1期
47-52
,共6页
李琛%夏强%曹阳%戴宝成%宋凤敏%刘智峰%葛红光
李琛%夏彊%曹暘%戴寶成%宋鳳敏%劉智峰%葛紅光
리침%하강%조양%대보성%송봉민%류지봉%갈홍광
海泡石%磁改性%含镍离子废水%处理%等温吸附模型
海泡石%磁改性%含鎳離子廢水%處理%等溫吸附模型
해포석%자개성%함얼리자폐수%처리%등온흡부모형
sepiolite%magnetic modification%nickel ion-containing wastewater%treatment%adsorption isotherm
以天然海泡石为原料，FeSO4·4H2O和FeCl3·6H2O为改性剂，制备了磁改性海泡石并用于处理含Ni2+废水。考察了吸附时间、反应温度、pH和Ni2+初始质量浓度对磁改性海泡石对Ni2+吸附量的影响。结果显示，磁改性海泡石对Ni2+的吸附量随吸附时间、温度、pH与Ni2+初始质量浓度的增加而提高，吸附行为与二级动力学方程和Langmuir等温吸附模型拟合较好。对于Ni2+质量浓度为50 mg/L的废水，在25°C、pH=5的条件下，0.5 g磁改性海泡石对Ni2+的吸附量为2.95 mg/g。通过正交试验优选出适用于处理Ni2+质量浓度为68.48 mg/L的某镀镍车间漂洗废水的最佳条件为：温度65°C，pH 4.2，吸附剂投加量1.5 g，时间为1.5 h。最终Ni2+去除率为99.65%，出水Ni2+质量浓度为0.24 mg/L，远低于GB 21900–2008中表2规定的排放限值(0.5 mg/L)。
以天然海泡石為原料，FeSO4·4H2O和FeCl3·6H2O為改性劑，製備瞭磁改性海泡石併用于處理含Ni2+廢水。攷察瞭吸附時間、反應溫度、pH和Ni2+初始質量濃度對磁改性海泡石對Ni2+吸附量的影響。結果顯示，磁改性海泡石對Ni2+的吸附量隨吸附時間、溫度、pH與Ni2+初始質量濃度的增加而提高，吸附行為與二級動力學方程和Langmuir等溫吸附模型擬閤較好。對于Ni2+質量濃度為50 mg/L的廢水，在25°C、pH=5的條件下，0.5 g磁改性海泡石對Ni2+的吸附量為2.95 mg/g。通過正交試驗優選齣適用于處理Ni2+質量濃度為68.48 mg/L的某鍍鎳車間漂洗廢水的最佳條件為：溫度65°C，pH 4.2，吸附劑投加量1.5 g，時間為1.5 h。最終Ni2+去除率為99.65%，齣水Ni2+質量濃度為0.24 mg/L，遠低于GB 21900–2008中錶2規定的排放限值(0.5 mg/L)。
이천연해포석위원료，FeSO4·4H2O화FeCl3·6H2O위개성제，제비료자개성해포석병용우처리함Ni2+폐수。고찰료흡부시간、반응온도、pH화Ni2+초시질량농도대자개성해포석대Ni2+흡부량적영향。결과현시，자개성해포석대Ni2+적흡부량수흡부시간、온도、pH여Ni2+초시질량농도적증가이제고，흡부행위여이급동역학방정화Langmuir등온흡부모형의합교호。대우Ni2+질량농도위50 mg/L적폐수，재25°C、pH=5적조건하，0.5 g자개성해포석대Ni2+적흡부량위2.95 mg/g。통과정교시험우선출괄용우처리Ni2+질량농도위68.48 mg/L적모도얼차간표세폐수적최가조건위：온도65°C，pH 4.2，흡부제투가량1.5 g，시간위1.5 h。최종Ni2+거제솔위99.65%，출수Ni2+질량농도위0.24 mg/L，원저우GB 21900–2008중표2규정적배방한치(0.5 mg/L)。
A magnetic modified sepiolite was prepared using natural sepiolite as raw material with FeSO4·4H2O and FeCl3·6H2O as modifier, and then used to treat wastewater containing Ni2+.The effects of adsorption time, reaction temperature, pH, and initial mass concentration of Ni2+on the adsorption amount of Ni2+by the magnetic modified sepiolite were studied. It was found that the adsorption amount of Ni2+on the magnetic modified sepiolite is increased with the increasing of adsorption time, temperature, pH, and initial mass concentration of Ni2+. The adsorption behavior is well fitted with a second order rate equation and Langmuir adsorption isotherm. The adsorption amount of Ni2+on the magnetic modified sepiolite in a wastewater containing 50 mg/L Ni2+is 2.95 mg/g under the conditions as follows:temperature 25 °C, pH 5, dosage of adsorbent 0.5 g. The process parameters for treating rinse wastewater containing 68.48 mg/L Ni2+discharged from a nickel plating workshop was optimized through orthogonal test as follows:temperature 65 °C, pH 4.2, dosage of adsorbent 1.5 g, and time 1.5 h. The removal rate of Ni2+is 99.65%, and the effluent mass concentration of Ni2+is 0.24 mg/L, which is much lower than that stipulated in the Table 2 of GB 21900–2008 standard.
