Department of Chemical Technology, Chulalongkorn University, Bangkok, Thailand.
Water Environ Res. 2011 Jan;83(1):65-74. doi: 10.2175/106143010x12780288628291.
The treatment of wastewater from the distillery industry was carried out by using nano-scale- and supported nano-scale zero-valent iron at a laboratory scale and ambient temperature. Effects of dilution, pH, mixing rate, zero-valent iron dosage, and amount of support for the zero-valent iron were investigated. All parameters had a significant effect on the removal efficiency of all investigated pollutants. Increasing the number of dilutions and the nano-scale zero-valent iron dosage led to the increase of removal efficiency of pollutants. Higher removal efficiency was achieved in an acidic initial pH of wastewater. The reduction of all pollutants was limited by the kinetics of the pollutant destruction/reduction by nano-scale zero-valent iron particles at a mixing rate greater than 170 rpm. At optimum condition, greater than 95, 94, and 64% of color, chemical oxygen demand, and biochemical oxygen demand were removed, respectively, within 6 hours. Additionally, the presence of a support had a significant effect on pollutant removal.
采用纳米零价铁和负载型纳米零价铁，在实验室规模和环境温度下对酿酒厂废水进行处理。考察了稀释度、pH 值、混合速率、零价铁用量和载体用量对各种污染物去除效率的影响。所有参数对所有被调查污染物的去除效率都有显著影响。增加稀释倍数和纳米零价铁用量可提高污染物的去除效率。在废水初始 pH 值较低时，可实现更高的去除效率。在混合速率大于 170rpm 时，所有污染物的还原均受纳米零价铁颗粒对污染物破坏/还原动力学的限制。在最佳条件下，6 小时内分别去除了 95%、94%和 64%以上的色度、化学需氧量和生化需氧量。此外，载体的存在对污染物的去除有显著影响。
