本文關(guān)鍵詞：離子交換樹脂去除原水中銻的研究　出處：《昆明理工大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 離子交換樹脂 銻 吸附 再生

【摘要】：銻是一種重金屬元素,具有慢性毒性和潛在致癌性,是一種全球性環(huán)境污染物質(zhì)。天然淡水中銻的濃度小于1μg/L,但是采礦區(qū)的水體中銻的含量可達數(shù)百乃至數(shù)千u g/L。水環(huán)境中,銻主要以三價(Sb(Ⅲ))和五價(Sb(V))兩種價態(tài)存在。 本文針對部分水資源含銻量較高的情況,采用離子交換法對其進行處理,使之達到國家規(guī)定的飲用水質(zhì)標準,為解決原水中銻超標的問題找到一種行之有效的方法。本課題采用D401螯合交換樹脂對受銻污染的原水進行修復,為工程實踐中應(yīng)用該方法修復銻污染水體提供借鑒和參考。 本文研究的主要內(nèi)容有：(1)離子交換樹脂的篩選,從D001、D201、D401中篩選出對銻去除率最高即吸附容量最大的離子交換樹脂；(2)選用D401螯合交換樹脂,通過靜態(tài)試驗,研究樹脂用量、原水pH值、原水溫度、振蕩時間等因素對銻的去除率的影響；(3)選用D401螯合交換樹脂,通過動態(tài)試驗,測定D401螯合交換樹脂除銻的穿透曲線；(4)通過吸附等溫試驗,研究D401螯合交換樹脂除銻的吸附模型,對樹脂除銻的機理進行分析研究；(5)D401螯合交換樹脂的再生試驗研究,并對樹脂的再生原理進行初步探討。 研究結(jié)果表明,D401螯合交換樹脂最佳試驗條件為樹脂用量4.00g(水樣為150mL),原水pH值在7.0左右,原水溫度在室溫20℃下,振蕩1小時以上,銻的去除率能達到95%以上。試驗得出除銻吸附等溫線所屬的類型,D401螯合交換樹脂對水中的銻吸附符合Freundlich吸附模型。采用準二級吸附動力學方程來描述D401螯合樹脂對銻的吸附動力學過程。顆粒擴散為反應(yīng)控制步驟,研究結(jié)果表明：顆粒擴散控制相關(guān)性為最佳。對鹽酸和氫氧化鈉兩種再生溶液比較和氫氧化鈉濃度不同的比較,得出用4%的氫氧化鈉溶液進行樹脂再生效果最合適,樹脂再生后交換能力可以得到恢復。離子交換法去除原水中銻具有方法操作簡便、實用性強、去除效率高等特點。因此,用離子交換法去除原水中銻是有效的和可行的。
[Abstract]:Antimony is a heavy metal element with chronic toxicity and potential carcinogenicity, is a global environmental pollutant. The concentration of antimony in natural water is less than 1 g/L, but the content can reach the mining area of antimony in water of hundreds or thousands of u g/L. in the water environment, mainly trivalent antimony (Sb (III) and pentavalent) (Sb (V)) has two valence.
This paper deals with the water resource antimony content high, ion exchange method was used to process, to meet the requirement of national drinking water quality standards, in order to solve the problem of antimony in raw water exceed the standard to find an effective method. This paper uses D401 chelating exchange resin to repair the antimony polluted raw water, provide a reference and the reference for the application of this method to repair antimony polluted water engineering practice.
The main contents of this paper are: (1) screening, ion exchange resin from D001, D201, selected the highest removal rate of antimony ion adsorption capacity is the largest exchange resin in D401; (2) using D401 chelating exchange resins by static test of resin dosage, pH value of raw water, water temperature, oscillation time and other factors affecting the removal of antimony; (3) using D401 chelating exchange resins by the dynamic test, the determination of the exchange resin in addition to breakthrough curve of antimony D401 chelate; (4) through the isothermal adsorption experiment, D401 chelating exchange resin in adsorption model of antimony, antimony removal mechanism of resin were studied; (5) experimental study on regeneration of D401 chelating exchange resins, and the regenerative principle of resin were discussed.
The results show that the optimal experimental conditions of D401 chelating resin exchange resin 4.00g (150mL water), pH value of raw water in about 7, the water temperature at room temperature under 20 DEG C, the oscillation of 1 hours or more, the antimony removal rate can reach more than 95%. In addition to test that type of antimony adsorption isotherm of the D401 chelate exchange antimony adsorption resin in water with Freundlich adsorption model. The two adsorption kinetic equation to describe the adsorption kinetics of D401 chelating resin for antimony. The particle diffusion is the controlling step of reaction, the results show that the particle diffusion control correlation is the best. To compare different regeneration solution and sodium hydroxide concentration of two hydrochloric acid and sodium hydroxide. Come with 4% sodium hydroxide solution regeneration effect most suitable resin exchange capacity, resin regeneration can be restored. After the removal of antimony with ion exchange method The method is simple, practical and efficient. Therefore, it is effective and feasible to remove antimony in the raw water by ion exchange.

【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU991.2

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