Park Jeong-Ann, Jung Sung-Mok, Yi In-Geol, Choi Jae-Woo, Kim Song-Bae, Lee Sang-Hyup
Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
Environment R&D Center, KORBI, Co., Ltd, Gyeonggi, 14059, Republic of Korea.
Chemosphere. 2017 Jun;177:15-23. doi: 10.1016/j.chemosphere.2017.02.150. Epub 2017 Mar 1.
Microcystin-LR (MC-LR) is a common toxin derived from cyanobacterial blooms an effective, rapid and non-toxic method needs to be developed for its removal from drinking water treatment plants (DWTP). For an adsorption-based method, mesoporous carbon can be a promising supplemental adsorbent. The effect of mesoporous carbon (MC1, MC2, and MC3) properties and water quality parameters on the adsorption of MC-LR were investigated and the results were analyzed by kinetic, isotherm, thermodynamic, Derjaguin-Landau-Verwey-Overbeek (DLVO), and intraparticle diffusion models. MC1 was the most appropriate type for the removal of MC-LR with a maximum adsorption capacity of 35,670.49 μg/g. Adsorption of MC-LR is a spontaneous reaction dominated by van der Waals interactions. Pore sizes of 8.5-14 nm enhance the pore diffusion of MC-LR from the surface to the mesopores of MC1. The adsorption capacity was not sensitive to changes in the pH (3.2-8.0) and the existence of organic matter (2-5 mg/L). Furthermore, the final concentration of MC-LR was below the WHO guideline level after a 10-min reaction with 20 mg/L of MC1 in the Nak-Dong River, a drinking water source. The MC-LR adsorption mainly competed with humic substances (500-1000 g/mole); however, they did not have a great effect on adsorption.
微囊藻毒素-LR（MC-LR）是一种源自蓝藻水华的常见毒素，需要开发一种有效、快速且无毒的方法从饮用水处理厂（DWTP）中去除它。对于基于吸附的方法，介孔碳可能是一种有前景的补充吸附剂。研究了介孔碳（MC1、MC2和MC3）的性质和水质参数对MC-LR吸附的影响，并通过动力学、等温线、热力学、德亚金-朗道-韦弗-奥弗贝克（DLVO）和颗粒内扩散模型对结果进行了分析。MC1是去除MC-LR最合适的类型，最大吸附容量为35670.49μg/g。MC-LR的吸附是一个由范德华相互作用主导的自发反应。8.5-14nm的孔径增强了MC-LR从MC1表面到介孔的孔扩散。吸附容量对pH值（3.2-8.0）和有机物（2-5mg/L）的存在变化不敏感。此外，在作为饮用水源的洛东江中，与20mg/L的MC1反应10分钟后，MC-LR的最终浓度低于世界卫生组织的指导水平。MC-LR的吸附主要与腐殖物质（500-1000g/mol）竞争；然而，它们对吸附没有很大影响。
