不同水化学作用对颗粒释放影响的理论研究  

THEORETICAL RESEARCHES ON EFFECT OF DIFFERENT HYDRO-CHEMICAL FACTORS ON PARTICLE RELEASING

作　　者：陈继红[1] 韩志勇[1] 王瑛[2] 李秀芳[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《水处理技术》2008年第1期43-46,共4页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(40572142)

摘　　要：通过批量试验,对一价阳离子浓度(Na+浓度),二价阳离子等,浓度(Ca2+浓度)和pH值三个最常见水化学因素对砂柱中粘土颗粒释放的影响进行了研究。试验结果表明,当加入NaCl溶液的浓度达到临界盐浓度时,砂柱中会产生颗粒释放现象;混合盐溶液中,Ca2+的存在会抑制颗粒的释放,即颗粒释放的临界离子强度值随着Ca2+摩尔百分含量的增加而降低;在相同盐浓度和振荡频率的条件下,溶液pH值越低,颗粒释放量越少;pH值越高,颗粒释放量越多。The effect of three common hydro-chemical factors, such as univalent cation concentration （Na^＋ ion concentration）, bivalent cation concentration （Ca^2＋ ion concentration） and pH value on clay particles releasing in sand column was studied through batch test. It was showed that, when the concentration of dosed NaCl solution reached the critical salt concentration, there would generate the phenomenon of particles releasing in sand column; in mixed salt solution, the existence of molar percent of Ca^2＋ would inhibit the particles releasing; the critical ion strength value of particles releasing decreased with increases of molar percent of Ca^2＋; under the condition of the same salt concentration and oscillating frequency, the lower the pH value, the less the releasing particles; the higher the pH value, the more the releasing particle quantity.

关 键 词：水化学 颗粒释放 临界盐浓度 t临界离子强度 

分 类 号：X523[环境科学与工程—环境工程]