本文選題：鎳 + 電鍍廢水　； 參考：《華東理工大學(xué)》2015年碩士論文

【摘要】：電鍍廢水成分復(fù)雜,常含有多種對人體、環(huán)境有害的重金屬,其中尤以鎳較為典型,廢水中含有的絡(luò)合物成分可與鎳離子形成金屬絡(luò)合物形式,大大增加了廢水處理難度。本課題以含有典型絡(luò)合物(酒石酸、檸檬酸、EDTA、氨)為代表的鍍鎳模擬廢水為研究對象,采用Fenton、UV/H2O2等多種方法對其進(jìn)行處理,研究各種方法對含絡(luò)合劑電鍍廢水中鎳的去除效果,并得出相應(yīng)的最佳工藝處理條件,為實際含鎳絡(luò)合廢水的處理提供依據(jù)。論文通過實驗和理論計算得出,廢水中酒石酸、檸檬酸、EDTA、氨等絡(luò)合劑的存在,會影響含鎳廢水通過氫氧化物沉淀法的去除效果,為達(dá)到《電鍍污染物排放標(biāo)準(zhǔn)》(GB21900-2008)中0.1 mg/L的排放標(biāo)準(zhǔn),應(yīng)降低廢水中酒石酸、檸檬酸、EDTA、氨絡(luò)合劑的濃度。對于酒石酸鎳模擬廢水,采用Fenton氧化法、UV/H2O2法處理效果較好。Fenton氧化法最佳工藝為：初始pH值3.0、30%H2O2投加量1.33 mL/L、n(Fe2+):n(H2O2)為1.4:1、反應(yīng)時間1 h,沉淀pH值10.0,處理后鎳濃度小于0.1 mg/L;UV/H2O2法最佳工藝為：初始pH值為3.0、30%H202加入量2 mL/L,15 W紫外燈光照120 min,沉淀pH值10.0,處理后鎳濃度為0.36 mg/L。對于檸檬酸鎳模擬廢水,Fenton氧化法可取得較好效果,而采用UV/H2O2法處理效果不佳。Fenton氧化法最佳工藝為：在pH值為3.0,30%H2O2投加量1.33 mL/L,n(Fe2+):n(H2O2)為1.4：1,反應(yīng)時間1 h,沉淀pH值10.0,處理后鎳濃度可降至0.46 mg/L。對于EDTA-Ni模擬廢水,采用陰離子交換樹脂吸附處理能使其中鎳滿足達(dá)標(biāo)要求,而采用Fenton氧化法、UV/H2O2法對其進(jìn)行處理,處理效果均不佳。采用RX-21、RX-31型陰離子交換樹脂,在廢水流速為4 BV/h、流過樹脂體積40 BV以下時,均能對鎳去除產(chǎn)生良好作用。對于鎳氨模擬廢水,采用螯合樹脂法、磷酸銨鎂沉淀法對其進(jìn)行處理,均有較好的去除效果。磷酸銨鎂沉淀法最佳工藝為：水中n(Mg2+):n(PO43-):n(NH3)=1.2:1:1,反應(yīng)pH值10.0,反應(yīng)時間2 h,處理后鎳濃度可低于0.1 mg/L。
[Abstract]:Electroplating wastewater contains a variety of heavy metals which are harmful to human body and environment, especially nickel, which can form metal complex with nickel ion, which greatly increases the difficulty of wastewater treatment. In this paper, nickel plating simulated wastewater with typical complex (tartaric acid, citrate EDTA, ammonia) as the research object was treated by Fentonon UV / H _ 2O _ 2 and other methods, and the removal effect of nickel in electroplating wastewater containing complex agent was studied. The optimal process conditions are obtained to provide the basis for the treatment of nickel containing complex wastewater. Through experiments and theoretical calculations, it is concluded that the presence of tartaric acid, citrate EDTA, ammonia and other complex agents will affect the removal efficiency of nickel containing wastewater by hydroxide precipitation. In order to meet the discharge standard of 0.1 mg / L in GB 21900-2008), the concentration of tartaric acid, citrate EDTA and ammonia complexing agent should be reduced. For nickel tartrate simulated wastewater, Using Fenton oxidation method to treat UV / H _ 2O _ 2 is better. Fenton oxidation method is as follows: initial pH value 3.0g / L ~ (30) H _ 2O _ 2 = 1.33 mL / L ~ (-1) H _ 2O _ 2 = 1.4: 1, reaction time 1 h, precipitation pH value 10.0. The best process is that the initial pH value is less than 0.1 mg / L ~ (-1) U _ (V / H _ 2O _ (2) H _ 2O _ 2) and the optimum process is: initial pH value is 1.33 mL 路L ~ (-1) H _ 2O _ 2, reaction time is 1 h, precipitation pH value is 10.0. The concentration of nickel was 0.36 mg 路L ~ (-1) 路L ~ (-1), pH value of precipitation was 10.0, and the amount of 2 mL 路L ~ (-1) ~ (-1) ~ (-1) H _ (20) was 2 mL 路L ~ (-1) ~ (-1) ~ (-1). The Fenton oxidation process for simulated wastewater of nickel citrate can obtain good results. The optimum conditions of UV / H _ 2O _ 2 treatment were as follows: 1.33 mL / L H _ 2O _ 2 = 1.33 mL 路L ~ (2 +) Fe _ (2) O _ (2) O _ (2) was 1.4: 1, reaction time was 1 h, pH value was 10.0, and the nickel concentration could be reduced to 0.46 mg 路L ~ (-1) after treatment. For EDTA-Ni simulated wastewater, the adsorption of nickel with anion exchange resin can make the nickel meet the standard, while Fenton oxidation and UV / H _ 2O _ 2 are used to treat the wastewater, and the treatment effect is not good. When the flow rate of wastewater is 4 BV / h and the volume of the resin is below 40 BV, the removal of nickel can be achieved by using RX-21 / RX-31 anion exchange resin. The nickel ammonia simulated wastewater was treated by chelating resin method and magnesium ammonium phosphate precipitation method. The optimum process of ammonium magnesium phosphate precipitation is as follows: in water, the concentration of nickel can be less than 0.1 mg / L, the reaction pH value is 10.0, the reaction time is 2 h, the reaction pH value is 10.0, the reaction time is 2 h, and the concentration of nickel is less than 0.1 mg 路L ~ (-1).
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X781.1

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