摘要
采用墨角藻作为低成本的吸附剂处理制革废水。制革废水呈黄棕色且具有高浓度的Cr(Ⅵ)。因此,使用Cr(Ⅵ)溶液和4种颜料混合,模拟制革废水,基于Box-Behnken设计,采用响应面分析法优化吸附过程。选择初始溶液pH、生物质含量和预处理中CaCl_2溶液浓度为主要参数。统计学分析结果表明:pH值的影响可以忽略不计,生物质含量和CaCl_2溶液浓度是主要的影响参数。在最优条件下,98%的Cr(Ⅵ)和88%的染料被除去。相比Temkin,Langmuir和D-R等温模型,Freundlich等温模型能够很好地拟合平衡数据。另外,证实了吸附后的吸附剂可以作为糙皮侧耳菌生产酶的支持基质。
The leather industrial effluents were treated by biosorption using fucus vesiculosus as low - cost adsorbent. These el- fluents were yellowish - brown color and high concentration of Cr（ VI ）. Therefore, biosorption process was optimized using response surface methodology based on Box - Behnken design operating with a simulated leather effluent obtained by mixture of Cr（ VI ） so- lution and four leather dyes. The initial solution pH, biomass dosage and CaC12 concentration in the pretreatment stage were select- ed as key variables. The statistical analysis shows that pH has a negligible effect, being the biomass dosage and CaC12 concentration the most significant variables. At optimal conditions,98% of Cr（ VI ） and 88% of dyes removal can be achieved. Freundlich fitted better to the obtained equilibrium data for all studied systems than Temkin, Langmuir or D - R models. In addition, the use of the final biosorbent as support - substrate to grown of enzyme producer fungi, Pleurotus ostreatus, was also demonstrated.
出处
《中国皮革》
CAS
北大核心
2014年第19期34-38,46,共6页
China Leather
