水化学特征对砂加载混凝沉淀处理高悬浮矿井水效果的影响

Effect of Hydrochemistry Characteristics on Coagulation Treatment of High Suspended Mine Drainage

砂加载技术被广泛应用于混凝沉淀高效处理高悬浮物矿井水。但对于原水水化学特征对石英砂加载混凝沉淀效果的影响则很少有系统的研究,影响机制也不清晰。为此,选用石英砂加载混凝处理高悬浮矿井水为研究对象,分析矿井水pH、Ca^(2+)、溶解性总固体(total dissolved solids,TDS)和乳化油含量对石英砂加载混凝处理高悬浮物矿井水效率的影响。分析结果表明:矿井水过低和过高的pH均不利于加载混凝沉淀处理的效率,pH为9.00时,混凝沉淀速率和效率最高。Ca^(2+)含量的增多和乳化油含量的降低能促进加载混凝沉淀效率的提升。而TDS含量的高低和水化学类型的差异并不是影响加载混凝沉淀处理高悬浮物矿井水的效率和沉降速率的主要因素。为进一步认知砂加载混凝处理工艺,提升其处理效率,实现中国煤矿矿井水资源保护和合理化利用具有重要的意义。

Loading coagulation with sand has been widely used to efficiently treat mine water with high suspended solids by coagulation.However,few systematic studies on the effect of hydrochemistry characteristics on coagulation treatment of high suspended mine drainage.Therefore,the typical high suspended mine water was selected to analyze the effect of pH,Ca^(2+),TDS(total dissolved solids)and emulsion oil on the efficiency of high suspended matter mine water treated by loading coagulation treatment with sand.The results show that lower and higher pH value are not helpful for the efficiency of loading coagulation treatment with sand.When pH is 9.00,the rate and efficiency of loading coagulation treatment are the highest.Meanwhile,the increase of Ca^(2+)content and the decrease of emulsified oil content can promote the efficiency of loading coagulation treatment.Whereas,the TDS content and hydrochemical type effect can be ignored.The results can effectively improve the operation technology of the loading coagulation with sand,realize the protection and rationalization of coal mine water resources.