pH与Eh对郑州北郊水源地沉积物中砷溶出的影响

Effect of pH and Eh on the dissolution of arsenic from the sediments in Northern Suburb Source Field,Zhengzhou

以郑州市北郊水源地富砷区域的地层沉积物(粗砂、细砂、粉土、黏土)为实验材料,研究了pH和氧化还原电位(Eh)对沉积物中砷溶出的影响规律,并分析了两个因素影响沉积物中砷溶出的原因.实验结果表明:碱性环境及还原环境有利于沉积物中砷的溶出.

The sediments with a high arsenic content, namely coarse sand, fine sand, silt and day, are chosen as experimental materials taken from Zhengzhou Northern Suburb Source Field. Effect of pH and Eh on the dissolution of arsenic from the sediments is discussed, and reasons for the influence are analyzed. The experimental results show that the alkaline condi- tion and reduction condition can promote the dissolution.