Devai I, Delaune R D
Wetland Biogeochemistry Institute, Louisiana State University, Baton Rouge 70803-7511, USA.
Environ Technol. 2002 Mar;23(3):319-29. doi: 10.1080/09593332508618412.
The effectiveness of various oxidants or redox buffers (ferric chloride, sodium hypochlorite, potassium permanganate, hydrogen peroxide and potassium nitrate) for controlling or reducing emission of reduced sulfur gases (hydrogen sulfide, carbonyl sulfide, methanethiol, dimethyl sulfide and carbon disulfide) produced from sewage sludge collected from a wastewater treatment plant was studied under laboratory conditions. Sludge was treated with 0, 30, 300 and 1000 ppm of each chemical and changes in emission of the various reduced sulfur gases were monitored over a period of 24 hours. Potassium permanganate and hydrogen peroxide were shown to be the best chemicals for reducing hydrogen sulfide (the dominant reduced sulfur gas measured) emission. Sodium hypochlorite was also effective in reducing hydrogen sulfide emission followed by the ferric chloride addition. Since considerably smaller quantities of other reduced sulfur gases were evolved, the influence of the various chemical additions were not as significant as the reduction observed for hydrogen sulfide emission. Potassium permanganate and hydrogen peroxide were effective in reducing methanethiol and dimethyl sulfide emission. To a lesser degree sodium hypochlorite and ferric chloride also reduced emission of these two reduced sulfur gases. Potassium nitrate had no effect on reducing hydrogen sulfide or any of the reduced sulfur gases over the 24 hour experimental period. Each of the chemicals used in the study had a little or no effect in reducing carbonyl sulfide and carbon disulfide emission from the sludge material.
在实验室条件下，研究了各种氧化剂或氧化还原缓冲剂（氯化铁、次氯酸钠、高锰酸钾、过氧化氢和硝酸钾）对控制或减少从污水处理厂收集的污水污泥产生的还原态硫气体（硫化氢、羰基硫、甲硫醇、二甲基硫和二硫化碳）排放的有效性。污泥分别用0、30、300和1000 ppm的每种化学物质进行处理，并在24小时内监测各种还原态硫气体排放的变化。结果表明，高锰酸钾和过氧化氢是减少硫化氢（所测主要还原态硫气体）排放的最佳化学物质。次氯酸钠在减少硫化氢排放方面也有效，其次是添加氯化铁。由于其他还原态硫气体的释放量要少得多，因此各种化学物质添加的影响不如硫化氢排放减少那么显著。高锰酸钾和过氧化氢在减少甲硫醇和二甲基硫排放方面有效。次氯酸钠和氯化铁在较小程度上也减少了这两种还原态硫气体的排放。在24小时的实验期内，硝酸钾对减少硫化氢或任何还原态硫气体均无效果。研究中使用的每种化学物质在减少污泥材料中羰基硫和二硫化碳排放方面几乎没有效果或没有效果。
