The micro-electrolysis technology was applied in the decolorizing treatment of bleaching E-stage effluent and the influencing factors were discussed in this paper. The initial pH and the retention time were main facto...The micro-electrolysis technology was applied in the decolorizing treatment of bleaching E-stage effluent and the influencing factors were discussed in this paper. The initial pH and the retention time were main factors influencing the color removal rate, in addition, adding air and enough pH for neutralization were necessary for the treatment. The test showed that the decolorizing result was efficient by micro-electrolysis treatment when adding air, initial pH was 3, 20 minutes of reaction time, the final pH 10 for neutralization. The color removal rate was up to 90%. The chance of ultraviolet absorption spectrum also demonstrated the mechanism of color removal in the wastewater treatment.展开更多
针对土壤中全硼测定存在难消解、干扰大、易挥发损失等问题,利用碱熔法、微波消解法以及微敞开石墨消解法对土壤全硼进行了测定分析,优化了消解条件,并对三种消解方式进行了验证对比。结果表明:碱熔剂种类以及用量会对碱熔法的准确性造...针对土壤中全硼测定存在难消解、干扰大、易挥发损失等问题,利用碱熔法、微波消解法以及微敞开石墨消解法对土壤全硼进行了测定分析,优化了消解条件,并对三种消解方式进行了验证对比。结果表明:碱熔剂种类以及用量会对碱熔法的准确性造成较大影响,选择KOH作为碱熔剂,并且KOH添加量为3.0 g时,可以获得更准确的结果;加酸种类以及赶酸温度的选择对微波消解法测定结果影响较大,选择加酸体系(5 mL HNO_(3)+1 mL HCl+3 mL HF+1.5 mL H_(3)PO_(4)),赶酸时温度选择170℃,测试效果较好;不同的加酸体系以及消解温度同样会引起微敞开石墨消解法测定结果出现较大误差,选择加酸体系(5 mL HNO_(3)+1 mL HClO_(4)+3 mL HF+1.5 mL H_(3)PO_(4)),消解温度设为170℃,测定结果更可靠。方法验证对比结果表明,碱熔法检出限为0.7 mg/kg,微波消解法检出限为0.9 mg/kg,微敞开石墨消解法检出限为1.0 mg/kg,均满足分析测定的要求。三种消解方式测定的准确度和精密度均符合要求,均可用于土壤全硼的测定,并且实际样品测定结果无显著性差异。三种消解方式优缺点和适用范围不同,实际测试时可以根据样品数量及样品中全硼大致含量等选择具体的消解方式。建立的方法可以为第三次全国土壤普查内业检测提供参考和借鉴。展开更多
目的:探讨经微弧氧化碱热处理(Micro-arc oxidation and alkali heatment,MAH)后Ti-24Nb-4Zr-8Sn合金和Bio-Oss修复种植体周围骨缺损的愈合情况。方法:Ti-24Nb-4Zr-8Sn合金制备成圆柱状样本,分二组(光滑表面和微弧氧化碱热组)进行表面...目的:探讨经微弧氧化碱热处理(Micro-arc oxidation and alkali heatment,MAH)后Ti-24Nb-4Zr-8Sn合金和Bio-Oss修复种植体周围骨缺损的愈合情况。方法:Ti-24Nb-4Zr-8Sn合金制备成圆柱状样本,分二组(光滑表面和微弧氧化碱热组)进行表面处理。拔除犬下颌第二、三、四前磨牙,拔牙窝周围制备骨缺损,将两组种植体随机植入拔牙窝内,缺损区放置Bio-Oss,1个月后组织学染色观察种植体周围骨缺损的修复情况。结果:微弧氧化碱热种植体周围及Bio-Oss颗粒表面类骨质多而密,种植体表面可见大量新生骨的存在,BIC达25.68±5.2%。光滑表面种植体周围的骨缺损区,Bio-Oss颗粒周围新生骨较少,种植体表面未见新生骨的存在。结论:MAH和Bio-Oss可促进种植体周围骨缺损的修复及种植体骨整合。展开更多
文摘The micro-electrolysis technology was applied in the decolorizing treatment of bleaching E-stage effluent and the influencing factors were discussed in this paper. The initial pH and the retention time were main factors influencing the color removal rate, in addition, adding air and enough pH for neutralization were necessary for the treatment. The test showed that the decolorizing result was efficient by micro-electrolysis treatment when adding air, initial pH was 3, 20 minutes of reaction time, the final pH 10 for neutralization. The color removal rate was up to 90%. The chance of ultraviolet absorption spectrum also demonstrated the mechanism of color removal in the wastewater treatment.
文摘针对土壤中全硼测定存在难消解、干扰大、易挥发损失等问题,利用碱熔法、微波消解法以及微敞开石墨消解法对土壤全硼进行了测定分析,优化了消解条件,并对三种消解方式进行了验证对比。结果表明:碱熔剂种类以及用量会对碱熔法的准确性造成较大影响,选择KOH作为碱熔剂,并且KOH添加量为3.0 g时,可以获得更准确的结果;加酸种类以及赶酸温度的选择对微波消解法测定结果影响较大,选择加酸体系(5 mL HNO_(3)+1 mL HCl+3 mL HF+1.5 mL H_(3)PO_(4)),赶酸时温度选择170℃,测试效果较好;不同的加酸体系以及消解温度同样会引起微敞开石墨消解法测定结果出现较大误差,选择加酸体系(5 mL HNO_(3)+1 mL HClO_(4)+3 mL HF+1.5 mL H_(3)PO_(4)),消解温度设为170℃,测定结果更可靠。方法验证对比结果表明,碱熔法检出限为0.7 mg/kg,微波消解法检出限为0.9 mg/kg,微敞开石墨消解法检出限为1.0 mg/kg,均满足分析测定的要求。三种消解方式测定的准确度和精密度均符合要求,均可用于土壤全硼的测定,并且实际样品测定结果无显著性差异。三种消解方式优缺点和适用范围不同,实际测试时可以根据样品数量及样品中全硼大致含量等选择具体的消解方式。建立的方法可以为第三次全国土壤普查内业检测提供参考和借鉴。
文摘目的:探讨经微弧氧化碱热处理(Micro-arc oxidation and alkali heatment,MAH)后Ti-24Nb-4Zr-8Sn合金和Bio-Oss修复种植体周围骨缺损的愈合情况。方法:Ti-24Nb-4Zr-8Sn合金制备成圆柱状样本,分二组(光滑表面和微弧氧化碱热组)进行表面处理。拔除犬下颌第二、三、四前磨牙,拔牙窝周围制备骨缺损,将两组种植体随机植入拔牙窝内,缺损区放置Bio-Oss,1个月后组织学染色观察种植体周围骨缺损的修复情况。结果:微弧氧化碱热种植体周围及Bio-Oss颗粒表面类骨质多而密,种植体表面可见大量新生骨的存在,BIC达25.68±5.2%。光滑表面种植体周围的骨缺损区,Bio-Oss颗粒周围新生骨较少,种植体表面未见新生骨的存在。结论:MAH和Bio-Oss可促进种植体周围骨缺损的修复及种植体骨整合。
