本文選題：γ-六氯環(huán)己烷 + 腐植酸　； 參考：《高等學(xué)校化學(xué)學(xué)報(bào)》2016年12期

【摘要】：研究了腐植酸(HA)存在下冰相體系中γ-六氯環(huán)己烷(γ-HCH)的光轉(zhuǎn)化規(guī)律.結(jié)果表明,HA濃度對(duì)γ-HCH的光轉(zhuǎn)化率呈現(xiàn)低濃度促進(jìn)而高濃度抑制的現(xiàn)象;鹽離子濃度、NO_2~-及NO_3~-對(duì)γ-HCH的光轉(zhuǎn)化率均有促進(jìn)作用;低濃度Fe~(3+)對(duì)γ-HCH的光轉(zhuǎn)化率有促進(jìn)作用,當(dāng)Fe~(3+)的濃度增大到50μmol/L時(shí),呈現(xiàn)抑制效應(yīng);γ-HCH在不同p H值條件下光轉(zhuǎn)化速率的大小順序?yàn)閴A性中性酸性.冰相中HA通過(guò)產(chǎn)生單線態(tài)氧(~1O_2)、羥基自由基(·OH)及三重激發(fā)態(tài)(HA*)加速γ-HCH的光轉(zhuǎn)化.HA存在下γ-HCH的光轉(zhuǎn)化產(chǎn)物主要是五氯環(huán)己烯、鄰二氯苯和對(duì)二氯苯、一氯苯,光轉(zhuǎn)化過(guò)程中~1O_2通過(guò)消耗中間產(chǎn)物間接加速了γ-HCH的光轉(zhuǎn)化過(guò)程.
[Abstract]:The phototransformation of 緯 -HCH in the presence of HA) was studied. The results showed that the photoconversion rate of 緯 -HCH was promoted by low concentration of HA and inhibited by high concentration of Ha-H, the light conversion rate of 緯 -HCH was promoted by the concentration of salt ion, the light conversion rate of 緯 -HCH was promoted by low concentration of Fe~(3, and the light conversion rate of 緯 -HCH was promoted by low concentration of Fe~(3. When the concentration of Fe~(3 increased to 50 渭 mol/L, the inhibitory effect was observed, and the order of photoconversion rate of 緯 -HCH was alkaline neutral acid at different pH values. In the ice phase, HA accelerates the photoconversion of 緯 -HCH by producing singlet oxygen and 1O _ 2C, hydroxyl radical (OH) and triplet excited state. In the presence of HA, the photo-conversion products of 緯 -HCH are mainly pentachlorocyclohexene, o-dichlorobenzene and p-dichlorobenzene, monochlorobenzene, and p-dichlorobenzene. The photoconversion process of 緯 -HCH was accelerated indirectly by consuming intermediate products.
【作者單位】： 吉林大學(xué)環(huán)境與資源學(xué)院地下水資源與環(huán)境教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):41073063)資助~~
【分類號(hào)】：O636.9;O644.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 姜琳琳;葉玫;羅冬蓮;;固相萃取-氣相色譜法測(cè)定沉積物中六氯環(huán)己烷、雙對(duì)氯苯基三氯乙烷的殘留量[J];上海海洋大學(xué)學(xué)報(bào);2012年01期

，

本文編號(hào)：1957679