电镀是当今全球三大污染工业之一，我国电镀行业每年排放出的废水达40亿立方米。电镀废水中含有的重金属离子如铬、镉、镍、铜、锌等，直接排放将恶化生态系统，给人类的健康和生产生活造成极大的负面影响。现有的处理电镀重金属废水方法多为化学.沉淀法、离子交换法、蒸发回收电解法、反渗透法等。近代人们在开发利用天然磁黄铁矿时，发现该矿物在重金属废水处理方面有一定的功效，起主要作用的是FeS。该矿物来源广泛、价格低廉，有很好的利用前景。本文采用FeS处理含多种重金属的电镀废水，目的是为天然磁黄铁矿处理电镀重金属废水的工业应用提供参考。本课题采用人工配水，进行试验室去除试验，选用火焰原子吸收分光光度法进行测试，研究了电镀废水中含单个金属离子Cr6+、Zn2+、Ni2+和含Cr6+、Zn2+、Ni2+ 、Cd2+、Cu2+、Pb2+多个混合离子的去除效果及影响因素，并对去除机理进行了探讨。研究结果表明，无论是去除单个离子，还是去除多个混合离子，均取得较好的效果，在所采用的试验条件下，单个离子的废水 ，各离子去除率均达100%；多个离子废水，Cr(VI)的平均去除率可达100％，Cd2+的平均去除率可达97.70％，Cu2+的平均去除率可达99.33％，Zn2+的平均去除率可达96.95%，Ni2+的平均去除率可达93.34％，Pb2+的平均去除率可达97.65％。影响去除效果的主要因素有反应时间 、振荡速率、FeS投加量和粒径、废水浓度和pH值。本文通过对沉渣进行光谱分析和扫描电镜分析，并结合前人研究成果，认为FeS处理电镀重金属废水主要机理为：氧化还原反应、化学沉淀反应、吸附共沉淀、混凝、絮凝。但是起主要作用的是生成难溶金属硫化物的化学沉淀反应。

ElectroPlating is one of the most serious three polluting industry in the world,every year the waste water of the plating industry in our country which released into nature have reached as much as 4,000,000,000m3.The electroplating waste water contains many heavy metals such as chromium,cadmium,nickel,cuprum,zinc.So the direct emission of it will lead to produce great negative effect for ecosystem,human health,industry production and living.At present, the electroplating waste water disposal methods mainly have chemical reagents sedimentation method,ion exchange method,evaporation recovery electrolysis method,reverse osmosis and so on.Recently,experts find that the nature pyrite can dispose heavy metals waste water, FeS have the primary effect.It spreads widely and have low price.The dissertation uses the FeS to dispose the electroplating heavy metals waste water to provide references for using nature pyrite to dispose heavy metals waste water in electroplating.The task adapts synthetic mix water and do lab experiment,choosing flame atomle absporption spectrometric method to test .The dissertation study the disposing rate and effective factors of the electroplating waste water which contains Cr6+、Zn2+、Ni2+and the mixed electroplating waste water which contains Cr6+、Cd2+、Cu2+、Zn2+、Ni2+ and Pb2+.The disposing mechanism is researched .The research results indicate that both the single ion waste water and mixed ion waste water,have a good disposing effection.Under the adapted experiment conditions,for the single ion waste water,all ion’s disposing ration ration is up to 100%.For the mixed ion waste water ,the average disposing ration: Cr6+: 100％、Cd2+: 97.70％、Cu2+: 99.33％、Zn2+: 96.95%、Ni2+: 93.34％、Pb2+: 97.65％.The main factors influencing the disposing effection have vibration time、vibration velocity、FeS dispensing dose and FeS particles,the waste water’s concerntration and pH.Through the deposition spectral analysis、absorption co-precipitation、flocculation and coagulation,but the main effect is chemic precipitation reaction.