The use of Fenton＇s reagent （Fe^2＋/H2O2） and Fenton-like reagents containing transition metals of Cu（Ⅱ）, Zn（Ⅱ）, Co（Ⅱ）, and Mn（Ⅱ） for an alum sludge conditioning to improve its dewaterability was invest...The use of Fenton＇s reagent （Fe^2＋/H2O2） and Fenton-like reagents containing transition metals of Cu（Ⅱ）, Zn（Ⅱ）, Co（Ⅱ）, and Mn（Ⅱ） for an alum sludge conditioning to improve its dewaterability was investigated. The results obtained were compared with those obtained from conditioning the same alum sludge using cationic and anionic polymers. Experimental results show that Fenton＇s reagent was the best among the Fenton and Fenton-like reagents for the alum sludge conditioning. A considerable effectiveness of capillary suction time （CST） reduction efficiency of 47% can be achieved under test conditions of Fe^2＋/H2O2 = 20/125 mg/g DS （dry solid） and pH 6.0. The observation of floc-like particles after Fenton＇s reagent conditioning of alum sludge suggested that the mechanism of Fenton＇s reagent conditioning was different from that of polymer conditioning. In spite of the lower efficiency in the CST reduction of Fenton＇s reagent in alum sludge conditioning compared to that of polymer conditioning, Fenton＇s reagent offers a more environmentally safe option. Tiffs study provided an example of proactive treatment engineering, which is aimed at seeking a safe alternative to the use of polymers in sludge conditioning towards achieving a more sustainable sludge management strategy.展开更多
目的：改良红细胞孵育渗透脆性试验（Osmotic fragility test，OFT）验证改良方法与标准操作方法结果一致性。方法对 OFT 采取加样取量及检测试剂减半和采用不同检测设备进行比色评价改良方法检测效果，即选取脆性增大和脆性降低样本10...目的：改良红细胞孵育渗透脆性试验（Osmotic fragility test，OFT）验证改良方法与标准操作方法结果一致性。方法对 OFT 采取加样取量及检测试剂减半和采用不同检测设备进行比色评价改良方法检测效果，即选取脆性增大和脆性降低样本100例（阳性50例，阴性50例），用一种加样改良和测试改良方法与传统方法进行结果比对。结果100例OFT 样本采取加样量与试剂减半检测出的结果与厂家标准操作加样量所测结果验证一致（T＝1．6608，P ＞0.05），两组数据间对比差别无统计学意义。结论OFT 改良方法替代传统 OFT 初筛方法可以更快、更客观地出结果服务于临床，且能有效地降低试剂和人力成本，提高检测效率。因此，该法可作为批量计生体检单位及检测设备缺乏的基层医院筛查珠蛋白生成障碍性贫血方法首选条件。展开更多
基金The first author would like to appreciate Ministry of Higher Education, Missions Department, Egypt for the fi- nancial support granted through Channel Scheme Mission.
文摘The use of Fenton＇s reagent （Fe^2＋/H2O2） and Fenton-like reagents containing transition metals of Cu（Ⅱ）, Zn（Ⅱ）, Co（Ⅱ）, and Mn（Ⅱ） for an alum sludge conditioning to improve its dewaterability was investigated. The results obtained were compared with those obtained from conditioning the same alum sludge using cationic and anionic polymers. Experimental results show that Fenton＇s reagent was the best among the Fenton and Fenton-like reagents for the alum sludge conditioning. A considerable effectiveness of capillary suction time （CST） reduction efficiency of 47% can be achieved under test conditions of Fe^2＋/H2O2 = 20/125 mg/g DS （dry solid） and pH 6.0. The observation of floc-like particles after Fenton＇s reagent conditioning of alum sludge suggested that the mechanism of Fenton＇s reagent conditioning was different from that of polymer conditioning. In spite of the lower efficiency in the CST reduction of Fenton＇s reagent in alum sludge conditioning compared to that of polymer conditioning, Fenton＇s reagent offers a more environmentally safe option. Tiffs study provided an example of proactive treatment engineering, which is aimed at seeking a safe alternative to the use of polymers in sludge conditioning towards achieving a more sustainable sludge management strategy.
文摘目的：改良红细胞孵育渗透脆性试验（Osmotic fragility test，OFT）验证改良方法与标准操作方法结果一致性。方法对 OFT 采取加样取量及检测试剂减半和采用不同检测设备进行比色评价改良方法检测效果，即选取脆性增大和脆性降低样本100例（阳性50例，阴性50例），用一种加样改良和测试改良方法与传统方法进行结果比对。结果100例OFT 样本采取加样量与试剂减半检测出的结果与厂家标准操作加样量所测结果验证一致（T＝1．6608，P ＞0.05），两组数据间对比差别无统计学意义。结论OFT 改良方法替代传统 OFT 初筛方法可以更快、更客观地出结果服务于临床，且能有效地降低试剂和人力成本，提高检测效率。因此，该法可作为批量计生体检单位及检测设备缺乏的基层医院筛查珠蛋白生成障碍性贫血方法首选条件。
