摘要
以酿酒过程中产生的酒糟为原料,制备得到氨化酒糟吸附剂,用于去除电镀废水中的六价铬〔Cr(Ⅵ)〕,利用FTIR、EDS、BET和SEM等对吸附剂组成和结构进行分析和表征,在不同的pH及吸附剂投加量条件下研究其对Cr(Ⅵ)吸附性能的影响。结果表明:氨化酒糟吸附剂表面引入了大量的氨基,氮元素占比达到4.40%,其比表面积增至25.67 m2/g;当平衡pH为2.7时,Cr(Ⅵ)的饱和吸附量达到150.45 mg/g,平均吸附速率达到1791.90 mg/(g·h);经过5次再生循环后,氨化酒糟吸附剂对Cr(Ⅵ)的吸附量达到98.44 mg/g,吸附性能损失率仅为19.60%。
To remove hexavalent chromium(Cr(Ⅵ))from electroplating wastewater,the ammoniated distilled grain-based adsorbent was prepared using the fermentation residue as the raw material by means of ammonia modification.The composition and structure of the adsorbent was analyzed and characterized by FTIR,EDS,BET and SEM,and its effect on Cr(Ⅵ)adsorption was studied under different pH and adsorbent dosage.The results showed that the amounts of amino groups were introduced into the surface of the ammoniated distilled grain-based adsorbent,and the contents of nitrogen element reached 4.40%.At equilibrium pH is 2.7,the saturated adsorption capacity of Cr(Ⅵ)reached maximum value 150.45 mg/g,and the average adsorption rate reached 1791.90 mg/(g·h).In addition,the regeneration performance of the adsorbent was evaluated.After five regeneration cycles,the adsorption performance of the adsorbent to Cr(Ⅵ)reached 98.44 mg/g,and the adsorption performance loss rate was 19.60%.
作者
党伟
王莉莉
张婷婷
DANG Wei;WANG Lili;ZHANG Tingting(Petroleum Exploration and Production Research Institute, Sinopec;College of Chemical Engineering, Beijing University of Chemical Technology)
出处
《环境工程技术学报》
CAS
2020年第1期79-84,共6页
Journal of Environmental Engineering Technology
基金
中国石油化工股份有限公司科技开发部项目(317013-6)
国家自然科学基金项目(51508573)
关键词
酒糟
吸附剂
电镀废水
六价铬
distilled grain
adsorbent
electroplating wastewater
hexavalent chromium
