摘要:本文詳細介紹了重金屬污染及其危害，并對HMCA1捕集劑對Cu2+ 和Zn2+兩種重金屬的捕集效果進行了詳細的研究。針對銅離子的特殊性質，我們采用了草酰二腙分光光度法，而對Zn2+我們采用了EDTA滴定法。

　　　草酰二腙分光光度法是通過測溶液的吸光度，然后根據所繪制的Cu2+的標準工作曲線來計算出溶液中的Cu2+。

　　　EDTA滴定法是在pH=5.5時，以二甲酚橙為指示劑，用EDTA標準溶液滴定，二甲酚橙與鋅離子生成紫紅色絡合物，當接近終點時EDTA奪取絡合物中的鋅離子，使指示劑呈游離態黃色，即為終點。通過記錄EDTA溶液所消耗的量來計算Zn2+的量。

　　　本文先對實驗設備進行了簡介，對實驗的步驟做了說明。然后對捕集劑進行捕集時的三種變量進行了仔細的推導與研究。包括捕集劑的添加量的不同，溶液的攪拌時間的不同以及捕集劑在不同pH下捕集效果的不同。

　　　實驗最后，通過我們的數據研究，得出的結論如下：HMCA1的溶液對Cu2+捕集效果的最佳投加量為25mL，最佳攪拌時間為25分鐘，最佳pH值為9；HMCA1的溶液對Zn2+捕集效果的最佳投加量為15mL，最佳pH值為10。

關鍵詞: 重金屬, 捕集效果, 草酰二腙分光光度法

Abstract:this article elaborates on the heavy metal pollution and its damages, and studies the trapping result of Cu2+ and Zn2+ by using the tapping agent of HMCA1. Based on the special characters of Cu2+, we implemented Oxalic acid bis Spectrophotometric Method, however, we used titration method for Zn2+.

　　　Oxalic acid bis Spectrophotometric Method calculates Cu2+ of the solution by firstly measuring the absorbance of the solution, and then drawing the Cu2+ standard curve.

　　　The EDTA titration uses xylenol orange as indicator titration and titrates with EDTA standard solution when ph value equals to 5.5. Xylenol orange and zinc ions formed purplish-red complex compound, when close to the end EDTA will seize the Zinc ions in the complex to make the indicator act free state yellow, that is the end. This method calculates the amount of Zn2+ by recording the consumed amount of EDTA solution. 

　　　This article firstly gives a brief introduction of the laboratory equipment, and illustrates the experimental steps . Then it makes careful derivation and research on the three variables when the trapping agents begin to trap. It includes the amount difference of the trapping agents and the difference of the solution stirring time. It also consists of the trapping effect while the trapping agent is under different pH value.

　　　Finally,we can draw the following conclusions according to our statistics research: the best dosage for HMCA1 solution to trap the Cu2+ is 25mL, the best stiring time is 25 minutes, and the best pH value is 9; the best dosage for HMCA1 solution to trap the Zn2+ is 15mL,and the best pH value is10.

Keywords: Heavy metal, Trapping effect, Oxalic acid bis Spectrophotometric Method