摘要
煤矸石pH值测定结果的差异对评价煤矸石酸性和预测酸水污染带来极大不便,目前国内外并没有明确出台有关煤矸石pH值测定标准。鉴于此,分析了国内外有代表性的煤矸石pH值测定方法,通过分析比较得出今后国内实验室测定煤矸石pH值时,需同时测定自然筛选粒径小于1mm和粉碎后粒径小于1mm的煤矸石pH值;应在水土质量比1∶1～2.5∶1,振荡频率120r/min时,连续振荡8h或静置24h后使用玻璃电极或性能相当的复合电极测定其pH值。准确的pH值测定结果对进一步试验材料选择、酸碱性评价、酸性废水处理和有害元素析出分析有着重要意义。
The difference of the coal reject pH value measured results would be high inconvenient to the evaluation of the coal reject acid and the prediction of acid water pollution zone. And there was no any standard on pH value measurement of coal reject issued at home and abroad. Thus the paper analyzed the typical measuring methods of coal reject pH value at home and abroad. The analysis comparison showed when the domestic lab measured the coal reject pH value, it would be necessary to measure the coal reject pH value of the natural screened particle less than l mm and the rushed coal reject particle less than 1 mm. With the water and soil quality ratio of 1 ： 1 ~ 2. 5 ： 1, a vibration frequency of 120 r/min with a continued vibration of 8 h or 24 h in static, a glass electrode or performance relative complex electrode would be applied to measure the pH value. The correct measured results of the pH value would have the great signifi- cance to the test material further selection, acid and soda evaluation, acidic waste water treatment and the harmful element analysis.
出处
《煤炭科学技术》
CAS
北大核心
2010年第2期108-112,共5页
Coal Science and Technology
基金
国家高技术研究发展计划(863计划)资助项目(2006AA06Z355)
国家自然科学基金资助项目(50874112)
关键词
煤矸石
PH值测定
酸性废水
土地复垦
coal rejects
pH value measurement
acidic waste water
land reclamation
