本文關鍵詞：過硫酸鹽緩釋材料釋放性能的影響因素研究，由筆耕文化傳播整理發(fā)布。

網(wǎng)友文檔精品近日為您收集整理了關于過硫酸鹽緩釋材料釋放性能的影響因素研究的文檔，，希望對您的工作和學習有所幫助。以下是文檔介紹：中國環(huán)境科學 2014,34(5):1187~1193 China Environmental Science過硫酸鹽緩釋材料釋放性能的影響因素研究陳方義 1,2,楊昱 2,廉新穎 2,姜永海 2*,席北斗 2,李定龍 1,張進保 2,馬志飛 2(1.常州大學環(huán)境與安全工程學院,江蘇常州 213164;2.中國環(huán)境科學研究院,北京 100012)摘要:運用不同配比制備多種過硫酸鹽緩釋材料,采用歐盟標準化組織制定的 NEN 7375 標準浸出方法測試其釋放性能,利用相關性分析和克里格插值法探究材料組分配比對過硫酸鹽緩釋材料釋放性能的影響規(guī)律.結果表明:作為制備過硫酸鹽緩釋材料基質材料的水、砂和水泥均有一定的適配范圍,即水含量在 5%~35%之間,砂含量在 0~85%之間,水泥含量在 5%~85%之間;緩釋材料的擴散系數(shù)與砂含量呈現(xiàn)顯著的正相關,與水泥含量呈現(xiàn)顯著的負相關,而與水含量無顯著相關性;基質材料對過硫酸鹽緩釋材料擴散系數(shù)的綜合作用較為復雜,總體而言,當水泥含量高于砂含量時,水含量是影響緩釋材料擴散系數(shù)的主要因素,當砂含量大于水泥含量時,砂含量則是影響緩釋材料擴散系數(shù)的主要因素.此外,增加緩釋材料中過硫酸鹽的含量可以提高過硫酸鹽的釋放速率并延長緩釋材料的使用壽命.關鍵詞:組分配比;過硫酸鹽;緩釋材料;釋放性能中圖分類號:X523 文獻標識碼:A 文章編號:1000-6923(2014)05-1187-07Influence factors of the release properties of the slow-release persulfate material. CHEN Fang-yi1,2, YANG Yu2,LIAN Xin-ying2, JIANG Yong-hai2*, XI Bei-dou2, LI Ding-long1, ZHANG Jin-bao2, MA Zhi-fei2(1.School ofEnvironmental and Safety Engineering, Changzhou University, Changzhou 213164, China;2.Chinese Research Academyof Environmental Sciences, Beijing 100012, China). China Environmental Science, 2014,34(5):1187~1193Abstract:The slow-release persulfate materials were prepared under ponent ratios. The release performancewas tested according to NEN 7375flume experiment method developed by anization for standardization.The influence law of ponent materials on the release properties of slow-release persulfate materials was studied bycorrelation analysis and Kriging interpolation method. Water, sand and cement were the matrix materials for formingslow-release persulfate materials. There was a certain adaption range for ponent. The range percentages for water,sand and cement are 5% to 35%, 0% to 85%, and 5% to 85%, respectively. The diffusion coefficients of slow-releasepersulfate materials had significant positive correlation with sand content. It showed significant negative correlation withcement content and there is no significant correlation with water content. prehensive effect of the matrix materialson the diffusion coefficients of slow-release persulfate materials was plicated. However, the main factor whichaffecting the diffusion coefficient was water content when cement content was higher than sand content, while cementcontent was lower than sand content, and then it became sand content. The release speed of slow-release persulfatematerial would be increased and the release cycle would e longer with the increasing of persulfate content.Key ponent ratio;persulfate;slow-release material;release properties目前,活性滲透反應墻(PRB)技術已成為地下水污染修復的主流技術,并得到廣泛應用[1-5].過硫酸鹽緩釋材料因其造價低廉、在過渡金屬催化條件下能夠產(chǎn)生強氧化性的硫酸根自由基SO4-,并且在酸性、中性、堿性條件下均具有良好的氧化能力[6-7],近年來常被用于土壤和地下水中難降解有機物的去除[8-12].研究表明,過硫酸鹽濃度為 200mg/L 時就能夠對濃度為 10mg/L 的難降解有機污染物(如 2,4-DNT、MTBE 等)起到良好的降解效果[13-16],而過硫酸鹽在水中溶解度為 5.3~54.9g/100mL,因此在實際工程中,若將過硫酸鹽直接作為 PRB 填料,不可避免的會造成氧化劑的浪費和地下水的二次污染,同時也不能對地下水污染物起到長期有效的降解效果[17-20],因收稿日期:2013-08-26基金項目:國家“863”項目(SS2012AA062025)、國家自然科學基金(41373129)* 責任作者, 副研究員, jyhai203@1188 中國環(huán)境科學 34 卷此在實際工程應用中有必要采取技術手段對過硫酸鹽進行緩釋以達到長期高

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  本文關鍵詞：過硫酸鹽緩釋材料釋放性能的影響因素研究，由筆耕文化傳播整理發(fā)布。