吸附
自愈水凝胶
亚甲蓝
化学
水溶液
明胶
朗缪尔吸附模型
核化学
高碘酸盐
水溶液中的金属离子
盐酸
化学工程
动力学
高分子化学
金属
无机化学
有机化学
催化作用
光催化
作者
Niklas Wahlström,Sophie Steinhagen,Gunilla B. Toth,Henrik Pavia,Ulrica Edlund
标识
DOI:10.1016/j.carbpol.2020.116841
摘要
Hydrogels based on the polysaccharide ulvan from the green macroalgae Ulva fenestrata were synthesized and evaluated as an adsorbent for heavy metals ions and methylene blue. Ulvan was extracted from Ulva fenestrata using diluted hydrochloric acid and recovered by precipitation with EtOH. The extracted ulvan was converted into ulvan dialdehyde via periodate-oxidation and subsequently combined with gelatin yielding hydrogels. The hydrogels showed good water-uptake capacity with a maximum swelling degree of 2400 % in water and 900 % in PBS buffer. Adsorption tests of methylene blue showed a maximum adsorption capacity of 465 mg/g. The adsorption data of methylene blue followed the pseudo-second order kinetics and agreed with the Langmuir adsorption isotherm. The maximum adsorption capacity of heavy metal ions was 14 mg/g for Cu2+, 7 mg/g for Co2+and 6 mg/g for Ni2+and Zn2+ indicating that the hydrogels have a stronger affinity for Cu2+ than for Co2+, Ni2+, and Zn2+.
科研通智能强力驱动
Strongly Powered by AbleSci AI