胶原纤维负载锆处理高浓度砷(Ⅴ)氟废水的研究

Disposal of High Concentration Arsenate(As(Ⅴ)) and Fluoride(F) Co-existing Containing Wastewater by Zr(Ⅳ) Immobilized Collagen Fiber

摘要:

将胶原纤维负载锆(ZrCF)用于高浓度砷(Ⅴ)、氟废水的处理。研究了ZrCF对砷(Ⅴ)、氟共存溶液的吸附，并以化肥厂高浓度砷(Ⅴ)氟废水为例考察了吸附剂用量、pH值、接触时间对吸附性能的影响，进行了固定床吸附试验。结果表明，相同浓度下ZrCF对砷(Ⅴ)的亲和作用优于对氟离子(F)的作用；吸附剂用量超过0.8 g，化肥厂出水的砷(Ⅴ)、氟浓度同时达到排放标准；处理的最佳酸度值是pH6.0，满足出水浓度限值的反应时间为6h；流出液体积为4.68 L时固定床对氟、砷(Ⅴ)均达到饱和。ZrCF可以高效地联合去除废水中的砷(Ⅴ)和氟。

Abstract:

Collagen fiber immobilized Zr(Ⅳ)(ZrCF) was applied in the treatment of high concentration arsenate and fluoride co-existing containing wastewater. Adsorption behavior of As(Ⅴ) and F by ZrCF in co-existing containing wastewater was investigated. Taking the high concentration arsenate and fluoride co-existing containing wastewater from fertilizer plant as example, the effects of adsorbent dose, initial pH and contact time on adsorption performance were studied and the column experiment was carried out. Results suggested ZrCF had stronger appetency to As(Ⅴ) than to F. When the adsorbent dose was above 0.8 g, the concentration of arsenate and fluoride in effluent satisfied the national discharge standard. pH6.0 was the optimal acidity value, and As(Ⅴ) and F content decreased to the limited value after 6 h. When the effluent volume was 4.68 L, the fixed bed was saturated to As(Ⅴ) and F , and ZrCF could remove arsenate and fluoride simultaneously and efficiently.