College of Food Science and Technology, Ocean University of China, Qingdao, Shandong 266003, China.
Bioinorg Chem Appl. 2009;2009:901563. doi: 10.1155/2009/901563. Epub 2010 Jan 27.
The adsorption of Cd(II) and Pb(II) by squid melanin was investigated. At a metal ion concentration of 2 mM/L, the biosorption efficiency of melanin reached 95% for Cd(II) and Pb(II). The maximum content of bound Cd(II) and Pb(II) was 0.93 mM/g and 0.65 mM/g, respectively. Temperature had no obvious effect on the adsorption of the metals, and in a pH range of 4.0-7.0, the adsorption yield was high and stable. Macrosalts such as NaCl, MgCl(2), and CaCl(2) had no obvious effect on the binding of Pb(II) but greatly diminished the adsorption of Cd(II), which indicated that different functional groups in squid melanin are responsible for their adsorption. IR analysis of metal ion-enriched squid melanin demonstrated that the possible functional groups responsible for metal binding were phenolic hydroxyl (OH), carboxyl (COOH), and amine groups (NH). This study reports a new material for the removal of heavy metals from low-strength wastewater.
研究了鱿鱼黑色素对 Cd(II)和 Pb(II)的吸附作用。在金属离子浓度为 2mM/L 时，黑色素对 Cd(II)和 Pb(II)的吸附效率均达到 95%。结合的 Cd(II)和 Pb(II)的最大含量分别为 0.93mM/g 和 0.65mM/g。温度对金属的吸附没有明显影响，在 pH 值为 4.0-7.0 的范围内，吸附率高且稳定。NaCl、MgCl(2)和 CaCl(2)等宏观盐对 Pb(II)的结合没有明显影响，但大大降低了 Cd(II)的吸附，这表明鱿鱼黑色素中的不同功能基团负责其吸附。对富含金属离子的鱿鱼黑色素的 IR 分析表明，可能负责金属结合的功能基团为酚羟基 (OH)、羧基 (COOH)和胺基 (NH)。本研究报道了一种从低浓度废水中去除重金属的新材料。
