文献类型：期刊文献

中文题名：pH、温度、水力扰动对饮用水水源水库沉积物中Al释放的影响

英文题名：Effect of pH,temperature and hydraulic disturbance on Al release from sediment of drinking water reservoir

作者：黄云英[1];袁鹏[2];刘飞翔[3];吴雪飞[4];颜徐琛[5];彭程[6,7];张元福[1]

机构：[1]中国地质大学(北京)能源学院,北京100083;[2]上海城投上境生态修复科技有限公司,上海200020;[3]日照市生态环境局,山东日照276800;[4]上海城市水资源开发利用国家工程中心有限公司,上海200082;[5]上海交通大学环境科学与工程学院,上海200240;[6]华东理工大学资源与环境工程学院,上海200237;[7]上海污染控制与生态安全研究院,上海200092

年份：2023

卷号：45

期号：10

起止页码：1331

中文期刊名：环境污染与防治

外文期刊名：Environmental Pollution & Control

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：国家自然科学基金资助项目(No.41572092);国家科技重大专项(No.2017ZX05009002-001)。

语种：中文

中文关键词：沉积物;Al;pH;温度;水力扰动

外文关键词：sediment;Al;pH;temperature;hydraulic disturbance

摘要：通过改变pH、温度和水力扰动程度进行多变量水平实验,研究上覆水pH、温度和水力扰动对饮用水水源水库沉积物中Al释放的影响。结果表明,上覆水中的Al具有快速沉积的特点,并主要以可还原态存在于沉积物中,静态模拟实验中上覆水Al浓度变化曲线均呈“L型”。初始pH对Al释放的影响较小,因为实验采用的初始pH区间(6.5~9.0)未达到Al显著释放的极限pH(pH≤4),当温度为4.0~30.0℃时,温度对Al释放的影响也较小,但影响机制复杂,难以进行单一因素判断。水力扰动会产生较大的剪切应力和湍流效应,改变水体溶解氧(DO)条件,从而对沉积物Al释放具有较大影响,其中连续高速扰动的影响最大。
In this study,the influence of pH,temperature and hydraulic disturbance on the release of Al from sediment in drinking water source reservoirs was studied through multi-variable horizontal experiments conducted at different levels of pH,temperature,and hydraulic disturbance.The results showed that Al in overlying water had a rapid deposition characteristic and existed mainly in the easily reducible state in sediment.In static simulation experiments,the concentration change curve of Al in overlying water presented an “L-type pattern”.The initial pH had a relatively limited impact on the release of Al,as the pH range used in the experiments(6.5-9.0) did not reach the critical pH(pH≤4) for significant Al release.Additionally,temperature had a limited impact on Al release within the range of 4.0-30.0 ℃,and the mechanism underlying was complex,making it difficult to determine its influence based on a single factor alone.Furthermore,hydraulic disturbance generated significant shear stress and turbulent flow,altered dissolved oxygen(DO) conditions in water,and thereby having a greater impact on sediment Al release,and continuous high-speed disturbance exerting the most significant influence.