Kim Beom-Sik, Lee Hyung Won, Park Sung Hoon, Baek Kitae, Jeon Jong-Ki, Cho Hye Jung, Jung Sang-Chul, Kim Sang Chai, Park Young-Kwon
School of Environmental Engineering, University of Seoul, Seoul, 130-743, Republic of Korea.
Department of Environmental Engineering, Sunchon National University, Suncheon, 540-950, Republic of Korea.
Environ Sci Pollut Res Int. 2016 Jan;23(2):985-94. doi: 10.1007/s11356-015-4368-z. Epub 2015 Mar 28.
The by-product char of the fast pyrolysis of a green macroalga Enteromorpha compressa was used to remove copper from an aqueous solution. The surface area and the amount of cation exchange capacity (CEC) were increased by steam activation, resulting in enhanced adsorption capacity. Although chemical activation using a KOH solution increased the pore volume and surface area dramatically, it decreased the adsorption capacity because of activating in the KOH solution and washing decreased CEC. Ion exchange between the Cu ions and cations (Na(+), K(+), Ca(2+), and Mg(2+)) as well as adsorption onto the functional groups on the char surface appeared to be important mechanisms for the removal of Cu. A pseudo-second-order kinetic model and Langmuir isotherm model could interpret the kinetics and equilibrium of the Cu adsorption on the E. compressa char. The maximum amount of Cu adsorption on the char was 137 mg g(-1).
利用绿藻浒苔快速热解产生的副产物炭去除水溶液中的铜。通过蒸汽活化增加了表面积和阳离子交换容量（CEC），从而提高了吸附容量。尽管使用KOH溶液进行化学活化显著增加了孔体积和表面积，但由于在KOH溶液中活化以及洗涤导致CEC降低，吸附容量下降。Cu离子与阳离子（Na⁺、K⁺、Ca²⁺和Mg²⁺）之间的离子交换以及在炭表面官能团上的吸附似乎是去除Cu的重要机制。准二级动力学模型和朗缪尔等温线模型可以解释浒苔炭对Cu吸附的动力学和平衡。炭对Cu的最大吸附量为137 mg g⁻¹。
