In-situ gelation of sodium alginate supported on melamine sponge for efficient removal of copper ions

• Published in: Journal of colloid and interface science Vol. 512; pp. 7 - 13
• Main Authors: Feng, Yi, Wang, Yayan, Wang, Yaquan, Zhang, Xiong-Fei, Yao, Jianfeng
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 15-02-2018
• Subjects: Cu(II) removal; Melamine sponge; Sodium alginate; Water treatment; Cu(II) removal; Water treatment; Sodium alginate; Melamine sponge
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2017.10.036

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Sodium alginate-melamine sponge composites were fabricated by in-situ gelation of sodium alginate supported on the commercial melamine sponge (MS). MS serves as the three-dimensional skeleton for alginate coating and can effectively avoid the shrink of alginate, and thus makes the alginate-MS composites user-friendly and facile to recover. In the adsorption test, the adsorption process is pseudo-second order and matches the Langmuir model with the maximum adsorption capacity of 90.1mg/g for copper ions. The alginate-MS is recyclable and presents enhanced mechanical properties compared with those of pristine MS. All these properties make such alginate-MS a promising candidate as an adsorbent for heavy metal removal.