本文關(guān)鍵詞：過(guò)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(guān)于過(guò)硫酸鹽緩釋材料釋放性能的影響因素研究的文檔，，希望對(duì)您的工作和學(xué)習(xí)有所幫助。以下是文檔介紹：中國(guó)環(huán)境科學(xué) 2014,34(5):1187~1193 China Environmental Science過(guò)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(jìn)保 2,馬志飛 2(1.常州大學(xué)環(huán)境與安全工程學(xué)院,江蘇常州 213164;2.中國(guó)環(huán)境科學(xué)研究院,北京 100012)摘要:運(yùn)用不同配比制備多種過(guò)硫酸鹽緩釋材料,采用歐盟標(biāo)準(zhǔn)化組織制定的 NEN 7375 標(biāo)準(zhǔn)浸出方法測(cè)試其釋放性能,利用相關(guān)性分析和克里格插值法探究材料組分配比對(duì)過(guò)硫酸鹽緩釋材料釋放性能的影響規(guī)律.結(jié)果表明:作為制備過(guò)硫酸鹽緩釋材料基質(zhì)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(kuò)散系數(shù)與砂含量呈現(xiàn)顯著的正相關(guān),與水泥含量呈現(xiàn)顯著的負(fù)相關(guān),而與水含量無(wú)顯著相關(guān)性;基質(zhì)材料對(duì)過(guò)硫酸鹽緩釋材料擴(kuò)散系數(shù)的綜合作用較為復(fù)雜,總體而言,當(dāng)水泥含量高于砂含量時(shí),水含量是影響緩釋材料擴(kuò)散系數(shù)的主要因素,當(dāng)砂含量大于水泥含量時(shí),砂含量則是影響緩釋材料擴(kuò)散系數(shù)的主要因素.此外,增加緩釋材料中過(guò)硫酸鹽的含量可以提高過(guò)硫酸鹽的釋放速率并延長(zhǎng)緩釋材料的使用壽命.關(guān)鍵詞:組分配比;過(guò)硫酸鹽;緩釋材料;釋放性能中圖分類號(hào):X523 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):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(yīng)墻(PRB)技術(shù)已成為地下水污染修復(fù)的主流技術(shù),并得到廣泛應(yīng)用[1-5].過(guò)硫酸鹽緩釋材料因其造價(jià)低廉、在過(guò)渡金屬催化條件下能夠產(chǎn)生強(qiáng)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(lái)常被用于土壤和地下水中難降解有機(jī)物的去除[8-12].研究表明,過(guò)硫酸鹽濃度為 200mg/L 時(shí)就能夠?qū)舛葹?10mg/L 的難降解有機(jī)污染物(如 2,4-DNT、MTBE 等)起到良好的降解效果[13-16],而過(guò)硫酸鹽在水中溶解度為 5.3~54.9g/100mL,因此在實(shí)際工程中,若將過(guò)硫酸鹽直接作為 PRB 填料,不可避免的會(huì)造成氧化劑的浪費(fèi)和地下水的二次污染,同時(shí)也不能對(duì)地下水污染物起到長(zhǎng)期有效的降解效果[17-20],因收稿日期:2013-08-26基金項(xiàng)目:國(guó)家“863”項(xiàng)目(SS2012AA062025)、國(guó)家自然科學(xué)基金(41373129)* 責(zé)任作者, 副研究員, jyhai203@1188 中國(guó)環(huán)境科學(xué) 34 卷此在實(shí)際工程應(yīng)用中有必要采取技術(shù)手段對(duì)過(guò)硫酸鹽進(jìn)行緩釋以達(dá)到長(zhǎng)期高

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  本文關(guān)鍵詞：過(guò)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。