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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Application of response surface methodology (RSM) for optimization of Cu~(2+), Cd~(2+), Ni~(2+), Pb~(2+), Fe~(2+), and Zn~(2+) removal from aqueous solution using microwaved olive stone activated carbon
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Application of response surface methodology (RSM) for optimization of Cu~(2+), Cd~(2+), Ni~(2+), Pb~(2+), Fe~(2+), and Zn~(2+) removal from aqueous solution using microwaved olive stone activated carbon

机译：响应面法（RSM）在优化Cu〜（2 +），Cd〜（2 +），Ni〜（2 +），Pb〜（2 +），Fe〜（2+）和Zn〜（ 2+）使用微波橄榄石活性炭从水溶液中去除

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摘要

The efficiencies of removal of Cu~(2+), Cd~(2+), Ni~(2+), Pb~(2+), Fe~(2+), and Zn~(2+) from aqueous solution with olive stone activated carbon (OSAC) were investigated in this work. A central composite design (CCD) method was used to optimize the preparation of OSAC using microwave assisted potassium hydroxide. RESULTS: The optimum conditions obtained were 565W radiation power, 7min radiation time, and 1.87 impregnation ratio. This resulted in 98.55% removal of Cu~(2+), 95.32% of Cd~(2+), 98.19% of Ni~(2+) 98.83% of Pb~(2+), 99.32% of Fe~(2+), 98.36% of Zn~(2+), and 85.15% of OSAC yield. The surface characteristics of the AC prepared under optimized conditions were examined by pore structure analysis, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). The BET surface area, total pore volume and average pore diameter of the prepared AC were 1280.71m~2g~(-1), 0.604cm~3g~(-1) and 4.63nm, respectively. The equilibrium data of the adsorption was well fitted to the Langmuir equation and the highest value of adsorption capacity (Q) on the OSAC was found for Fe~(2+) (62.50mgg~(-1)), followed by Pb~(2+) (23.47mgg~(-1)), Cu~(2+) (22.73mgg-1), Zn~(2+) (15.08mgg~(-1)), Ni~(2+) (12.00mgg~(-1)), and Zn~(2+) (11.72mgg~(-1)). CONCLUSIONS: OSAC prepared by microwaves can be used for the removal of metals from contaminated wastewater.
机译：从水溶液中去除Cu〜（2 +），Cd〜（2 +），Ni〜（2 +），Pb〜（2 +），Fe〜（2+）和Zn〜（2+）的效率用橄榄石活性炭（OSAC）进行了这项工作的研究。中央复合设计（CCD）方法用于优化微波辅助氢氧化钾制备OSAC的方法。结果：获得的最佳条件是565W辐射功率，7min辐射时间和1.87浸渍率。这导致去除了98.55％的Cu〜（2 +），95.32％的Cd〜（2 +），98.19％的Ni〜（2+）98.83％的Pb〜（2 +），99.32％的Fe〜（2 +），Zn〜（2+）的98.36％和OSAC产率的85.15％。通过孔结构分析，扫描电子显微镜（SEM）和傅里叶变换红外光谱（FT-IR）检查了在最佳条件下制备的AC的表面特性。制备的AC的BET表面积，总孔体积和平均孔径分别为1280.71m〜2g〜（-1），0.604cm〜3g〜（-1）和4.63nm。吸附的平衡数据很好地拟合了Langmuir方程，并且发现Fe〜（2+）（62.50mgg〜（-1）），Pb〜（ 2+）（23.47mgg〜（-1）），Cu〜（2+）（22.73mgg-1），Zn〜（2+）（15.08mgg〜（-1）），Ni〜（2+）（12.00 mgg〜（-1））和Zn〜（2+）（11.72mgg〜（-1））。结论：微波制备的OSAC可用于去除受污染废水中的金属。

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