SUPER ABSORBENT POLYMERS IN ENVIRONMENTAL REMEDIATION
SUPER ABSORBENT POLYMERS IN ENVIRONMENTAL REMEDIATION
复制标题
超级吸水性聚合物在环境修复中的应用
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
R. Dhodapkar
中科院分区：
文献类型：
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作者：
R. Dhodapkar
先前报道的实验室研究显示，通过市售（高吸水性聚合物）SAP Jalshakti (JS) 从水溶液中选择性去除染料，结果非常有希望。 JS 本质上是介孔的，是所研究的碱性染料的潜在吸附剂。本文介绍了分批模式下亚甲基蓝染料 (MB) 的吸附和动力学研究。随着MB初始浓度从100-1000mg/l增加，平衡吸附容量从138.9mg/g增加到1428.6mg/g。获得的最大吸附容量为1200 mgg，大于文献报道的吸附剂。 Kf值为165.3 mggL。斜率 1/n，范围在 0 和 1 之间，表示吸附剂表面上的相对能量分布（或表面异质性）。吸附过程的动力学表明伪二阶模型占主导地位。颗粒内扩散模型描述的孔扩散动力学也控制吸附过程，但不是唯一的速率限制机制。
Laboratory studies reported earlier, have shown very promising results in the selective removal of dyes from aqueous solutions by a commercially available (super absorbent polymer) SAP, Jalshakti (JS). JS is mesoporous in nature and is a potential adsorbent for the basic dyes studied. This paper presents the adsorption and kinetic studies for the Methylene blue dye (MB) in a batch mode. The equilibrium adsorption capacity increases from 138.9 to 1428.6 mgg as the initial concentration of MB increases from 100-1000 mg l. The maximum adsorption capacity obtained is 1200 mgg which is more than the adsorbents reported in literature. The Kf value is 165.3 mggL. The slope 1/n, ranging between 0 and 1, is indicative of the relative energy distribution on the adsorbent surface (or surface heterogeneity) The kinetics of the adsorption process suggests that the pseudo second order model is predominant. The pore diffusion kinetics as described by intraparticle diffusion model also controls the adsorption process but is not the only rate limiting mechanism.