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研究了多孔铁炭填料对模拟矿山酸性废水中Cu~(2+)的去除特性,并与商业活性炭的吸附性能作了比较。研究表明,铁炭填料对Cu~(2+)的去除速度快,当填料投加量为1.14 g/L时,吸附10 min后Cu~(2+)的去除率超过95%,吸附平衡后Cu~(2+)的去除率达99.96%,模拟矿山酸性废水经铁炭微电解处理后,pH值从约3.0上升到5.0~5.5,降低了其酸污染。铁炭填料和活性炭对酸性矿山废水中Cu~(2+)的去除均符合准二级吸附动力学规律和Langmuir等温吸附模型,铁炭填料和活性炭对Cu~(2+)的最大吸附量分别为714.29和9.69 mg/g,铁炭填料去除Cu~(2+)的性能远高于活性炭。铁炭微电解去除Cu~(2+)包括了吸附、金属置换、微电解和絮凝等多种作用机理。
The removal of Cu 2+ from simulated mine acid wastewater by porous iron-based carbon filler was studied and compared with that of commercial activated carbon. The results show that the removal rate of Cu 2+ is faster than that of ferrous filler. When the filler is added to 1.14 g / L, the removal rate of Cu 2+ is over 95% after 10 min adsorption. After adsorption equilibrium The removal rate of Cu ~ (2+) reaches 99.96%. After the simulated mine acidic wastewater is treated by ferric-carbon micro-electrolysis, the pH value rises from about 3.0 to 5.0-5.5, reducing the acid pollution. The removal of Cu2 + from the acidic mine wastewater by iron-carbon filler and activated carbon both accorded with the quasi-second order adsorption kinetics and the Langmuir isothermal adsorption model. The maximum adsorption capacity of Cu2 + by the iron-carbon filler and activated carbon 714.29 and 9.69 mg / g, respectively. The performance of iron-based filler in removing Cu ~ (2+) was much higher than that of activated carbon. Removal of Cu ~ (2+) by iron-carbon micro-electrolysis includes many mechanisms such as adsorption, metal displacement, micro-electrolysis and flocculation.