【摘要】：治理室內(nèi)環(huán)境污染，有必要研究高效、便捷的甲醛去除方法，提高甲醛降解率，本文采用正交試驗(yàn)分析二氧化氯降解甲醛，以二氧化氯濃度、甲醛濃度、反應(yīng)時(shí)間和反應(yīng)溫度作為考察因素，分析其對(duì)甲醛降解的影響，獲得甲醛降解的最佳條件，通過單因素實(shí)驗(yàn)分析二氧化氯濃度對(duì)甲醛降解率的影響。采用同一實(shí)驗(yàn)裝置，以二氧化鈦負(fù)載量、反應(yīng)溫度及濕度為因素，在紫外光條件下進(jìn)行單因素實(shí)驗(yàn)，分析反應(yīng)時(shí)間與甲醛濃度關(guān)系。結(jié)果表明： (1)在二氧化氯去除甲醛的研究中，通過正交試驗(yàn)得到最佳條件:二氧化氯濃度15mg/m3，甲醛濃度2mg/m3，反應(yīng)溫度25℃，，反應(yīng)時(shí)間40min。在最佳條件下，以二氧化氯濃度為變量進(jìn)行單因素實(shí)驗(yàn)，得出二氧化氯濃度為12.5mg/m3時(shí)降解率60%，甲醛降解效果最優(yōu)。研究了甲醛濃度0.5mg/m3、反應(yīng)40min、反應(yīng)溫度25℃、二氧化氯濃度5.0mg/m3時(shí)對(duì)甲醛降解效果，剩余甲醛濃度0.077mg/m3，降解率84.6%。 (2)在二氧化鈦光催化去除甲醛研究中，通過單因素實(shí)驗(yàn)得到最佳條件是：室溫25℃左右,濕度50%,紫外燈照射120min的條件下,負(fù)載5g自制二氧化鈦的光催化對(duì)甲醛降解率能夠達(dá)到91.6%,且在降解速率及降解效果上明顯優(yōu)于P25納米二氧化鈦對(duì)甲醛的降解效果。同時(shí)還研究了甲醛濃度0.5mg/m3與負(fù)載5g自制二氧化鈦的光催化的反應(yīng)，在210min時(shí)，剩余甲醛濃度0.062mg/m3，降解率為87.6%。
[Abstract]:In order to control indoor environmental pollution, it is necessary to study efficient and convenient methods to remove formaldehyde and improve the degradation rate of formaldehyde. In this paper, the orthogonal test is used to analyze the degradation of formaldehyde by chlorine dioxide, the concentration of chlorine dioxide and the concentration of formaldehyde. The influence of reaction time and reaction temperature on formaldehyde degradation was analyzed and the optimum conditions were obtained. The influence of chlorine dioxide concentration on formaldehyde degradation rate was analyzed by single factor experiment. A single factor experiment was carried out under ultraviolet light with titanium dioxide loading amount, reaction temperature and humidity as factors. The relationship between reaction time and formaldehyde concentration was analyzed. The results showed that: (1) in the study of formaldehyde removal by chlorine dioxide, the optimum conditions were obtained by orthogonal test: chlorine dioxide concentration 15 mg / m 3, formaldehyde concentration 2 mg / m 3, reaction temperature 25 鈩

本文編號(hào)：2160662