【摘要】 金属矿废石暴露在自然环境中易产生酸性污染物、释放重金属离子,对周边环境造成严重污染。鉴于其污染的长期性,有必要对废石产酸规律及释放重金属离子行为进行研究。以江西省某铜矿废石为对象,通过动态淋溶试验研究了淋溶液p H值、废石粒度、淋溶强度（淋溶液流速）等因素对产酸及释放重金属离子的影响。结果表明,淋溶液p H值与SO₄^2-产生量及Cu、Pb的释放量负相关,淋溶液p H值越低,SO₄^2-、Cu、Pb的累计释放量越大;而Zn呈现不同规律,淋溶液p H值为5时其累计释放量高于淋溶液p H值为3时,表明Zn在弱酸性环境中更易释放溶出。废石粒径越小,越有利于产酸和释放重金属离子,细粒径废石淋溶体系内SO₄^2-、Cu、Pb、Zn累计释放量显著高于粗粒径废石。淋溶液流速与SO₄^2-产生量及重金属离子的释放量正相关,在高淋溶液流速（1.02m L/min）、低初始淋溶液p H值（3）、细粒径废石（0.15～0.25mm）淋溶体系中,SO₄^2-、Cu、Pb、Zn累计释放量分别可达1389.55mg/kg、310.18μg/kg、413.18μg/kg和281.62μg/kg。研究结果可以为类似有色金属矿山废石的产酸和释放重金属离子行为及污染治理提供指导。更多还原

【Abstract】 Metal heavy mine waste serious rock pollution production exposed to the natural surrounding environment environment.In the is easy view to of produce the acidic long-term pollutants nature and release pollution,it metal necessary ions,causing to to of the waste object,and of ions.A its copper leaching is waste study Jiangxi the Province the acid was waste law the the rock the leaching dynamic and behavior of factors solution test.The releasing such heavy the metals value mine rock in particle of taken rock,and investigated correlated as influence(drench leaching SO₄^2-production of as rate)results p H on of acid the solution,the and size heavy of metals was intensity through of the amount flow the showed production the the the release drenching ions negatively was that and p H Pb,and value the of lower solution of with the greater of and the SO₄^2-,Cu release and of Pb.In a Cu the different p H value trend,indicated the and drenching its solution was,the release the a cumulative drenching release solution of of contrast,Zn drenching showed a cumulative Zn was to higher released favorable at p H solution5in and than a that weakly at solution p H of smaller particle3,which the that of was waste more rock,the system likely more be from waste the rock drenching acid acidic of environment.The heavy particle size size rock to production release release the metals ions,fine waste waste solution SO₄^2-,Cu,Pb,Zn leaching rate in positively could the cumulative SO₄^2-production of heavy up to metalμg/kg low coarse ions particle release,and size the rock.The cumulative drench flow SO₄^2-,Cu,Pb system was Zn hing correlated reach with389.55and releases of and1drench mm).The waste mg/kg,310.18solutionμg/kg,413.18（1.02and initial281.62p Hμg/kg,respectively,in drench the of waste heavy drencrock metwith a high flow of rate the m L/min）,a provide of solution acid（3）,and production a and fine-sized release(0.15～0.25als results of study similar can non-ferrous guidance metal for and the behavior pollution of of ions from rock the mines management.更多还原