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首页> 外文期刊>International Journal of Environmental Science and Technology >Investigating the chemical stabilization of hazardous waste material (fly ash) encapsulated in Portland cement.
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Investigating the chemical stabilization of hazardous waste material (fly ash) encapsulated in Portland cement.

机译:研究封装在波特兰水泥中的有害废料(粉煤灰)的化学稳定性。

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Portland cement has been suggested as an effective stabilization (physico-chemical) method for hazardous waste. This research explored the immobilization of metals in various mixtures of Portland cement and fly ash waste sampled from coal power plant in the province of Lodz, central Poland. The stabilization of fly ash in Portland cement was investigated under a wide range of pH conditions (3-12). Leachability tests were used to determine the efficiency of the encapsulation by studying the dissolution of alkaline metals (sodium, potassium) and alkaline earth metals (calcium, magnesium). The lowest value of leached metals was obtained for ratio of ash to cement of 1:10 in a case of sodium and calcium, while ratio 1.5 gave the lowest leached effects for potassium and magnesium. The high effectiveness of solidification/stabilization process was gained in high pH values (9-11).
机译:波特兰水泥已被建议作为危险废物的有效稳定(物理化学)方法。这项研究探索了从波兰中部罗兹省燃煤电厂采样的波特兰水泥和粉煤灰废物的各种混合物中的金属固定化。在广泛的pH条件下(3-12),对波特兰水泥中粉煤灰的稳定性进行了研究。通过研究碱金属(钠,钾)和碱土金属(钙,镁)的溶解度,使用浸出力测试来确定包封的效率。在钠和钙的情况下,灰分与水泥的比例为1:10时,浸出金属的最低值,而钾和镁的比例为1.5时,浸出金属的最低。在高pH值下可获得较高的固化/稳定化过程效率(9-11)。

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