Insights into the highly efficient treatment of dyeing wastewater using algal bloom derived activated carbon with wide-range adaptability to solution pH and temperature

作者：Wang, Yan-Shan; Luo, Shu-Qi; Li, Xiu-Yan; Li, Zhe-Xin; Huang, Ping-Ping; Zhou, Lu-Lu; Zhang, Si-Qiang; Miao, Kun-Hong; Zhi, Wei-Ru; Deng, Shi-Yu; Huo, Tong-Rong; Zhang, Qiu-Yu; Wang, Wei-Kang^*

来源：Bioresource Technology, 2022, 349: 126883.

DOI：10.1016/j.biortech.2022.126883

• Activated carbon
• Algal biomass
• RhB removal
• Solution pH and temperature tolerance
• Mechanisms

Here, a low-cost acid-base and temperature tolerant algal bloom derived activated carbon (ABAC) was successfully prepared to remove rhodamine B (RhB) from water. The ABAC exhibited maximum adsorption capacity of RhB (1101 +/- 11 mg/g), higher than that of laboratory-prepared rape straw activated carbon (176 +/- 5 mg/g) and commercial activated carbon (489 +/- 5 mg/g). It is attributed to larger surface area and mesoporous structure of the ABAC. Furthermore, the effective adsorption of RhB by using ABAC was achieved at a wide range of solution pH (3.2-10.8) and temperature (25-50 degrees C). The mass transfer resistance of RhB adsorption process well depicted by Langmuir model was controlled by external mass transfer. The adsorption process involved both secondly chemisorption (H-bonds and pi-pi interaction) and dominated physisorption. Four dyes in river water were efficiently removed. This work provides a promising approach for developing high-absorption biomass materials for actual dye wastewater treatment.

• 单位
  南通大学