%0 Journal Article
%T Optimization of oxygen-releasing materials and pH regulation in groundwater remediation system<br>地下水修复系统中释氧材料的改进及pH调控
%A Kong Xiangke
%A Zhang Ying
%A Bi Erping
%A <br>孔祥科
%A 张英
%A 毕二平
%J 环境工程学报
%D 2012
%I 
%X Using oxygen-releasing materials to supply oxygen for groundwater remediation system can result in pH increase of groundwater. To solve this problem, three kinds of oxygen-releasing materials were made by blending cement, calcium peroxide (CaO2), sand, bentonite, KH2PO4 and water together with certain proportion. Column experiments were conducted to evaluate the influence of oxygen-releasing materials on dissolved oxygen (DO) and pH of groundwater. The experimental results showed that cement has a good effect on controlling oxygen-releasing rate. High proportion of cement in oxygen-releasing materials can delay the oxygen-releasing rate and avoid high pH of water caused by the fast reaction of oxygen-releasing materials. Adding KH2PO4(mass fraction less than 10%)in oxygen-releasing materials can decrease pH of system and total phosphorus concentration in water can meet the drinking water standard. Using granular tourmaline (1~2 mm in diameter) as the buffering zone can decrease high pH from 11.3 to 10.2
%K oxygen-releasing materials
%K dissolved oxygen
%K pH
%K tourmaline<br>释氧材料
%K 溶解氧
%K pH
%K 电气石
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=92E6F4267FD4CBCB51B1E49E014D8054&jid=3567BD61129AA59043F5DE01F8815DB5&aid=66FD72374B2E351F4712919B68119DC4&yid=99E9153A83D4CB11&vid=B31275AF3241DB2D&iid=9CF7A0430CBB2DFD&sid=943AC17D52E75B65&eid=ACCBCB87757CE0E6&journal_id=1673-9108&journal_name=环境工程学报&referenced_num=0&reference_num=17