摘要：近年來，我國的染料工業得到了迅速發展，但是染料生產廢水的環境污染問題也隨之而來。染料廢水以其色度深、鹽分高、有機物濃度高、生物可降解性差等特點而成為染料廢水處理的難題之一。而電凝聚技術由于具有結構緊湊、易于實現自動化、不易產生二次污染等優點，因而成為現代印染廢水處理研究領域的一個熱點。本次實驗采用電凝聚法處理直接蘭染料廢水的脫色效果，考察了反應時間、槽電壓、電極間距、溶液pH、電解質投加量等因素對脫色效果的影響。結果表明：反應時間、槽電壓、pH、電極間距和電解質投加量都對脫色效果有不同程度的影響。而在反應時間為16min，槽電壓為12V，溶液pH為3.5，電極間距為22cm，電解質投加量為6mL的條件下，染料去除率最好，達到98.67%。

關鍵詞：電凝聚；直接蘭；染料廢水；廢水處理

Abstract：With the development of dyestuff industry in our country,aquatic environmental pollution problems caused by the dye wastewater have attracted great attention recent years.And dye wastewater is of high chroma,salinity and organic concentration，and difficult to be biodegraded，so that it has become one of the dye wastewater treatment difficulties.

But the electrocoagulation has a compact structure,simple structure and is easy to realize automation,at the same time it is also difficult to produce secondary pollution,so electrocoagulation has became a hot spot on modern printing and dyeing wastewater treatment research field.This study investigated the efficiency of electrocoagulation in removing color from direct blue dye wastewater. The influence of reaction time,the cell voltage,electrode spacing,the initial pH, electrolyte dosing amount on decolorization are tested through experiments.The results shows that reaction time,the cell voltage,electrode spacing,the initial pH, electrolyte dosing amount have obvious effects on the decolorization of the dye.The color removal is best to reach 98.67%,when direct blue dye wastewater reaction time is 16min,the cell voltage is 12V,electrode spacing is 22cm,the initial pH is 3.5 and electrolyte dosing amount is 6mL.

Key: electrocoagulation；direct blue；dye wastewater；wastewater treatment