Kamaliya Bhagvan P, Dave Pragnesh N, Chopda Lakha V
Department of Chemistry, Sardar Patel University, Vallabh Vidynagar, Gujarat 388 120 India.
B. N. Patel Institute of Paramedical & Science (Science Division), Sardar Patel Education Trust, Bhalej Road, Anand, Gujarat 370 001 India.
J Environ Health Sci Eng. 2023 Jun 17;21(2):403-416. doi: 10.1007/s40201-023-00867-w. eCollection 2023 Dec.
The grafting of biopolymer gum ghatti (GG) over the PNIPAM and PAA was done and loaded with graphene oxide (GO). Aim of this work is carried out combine adsorption of sodium diclofenac (SD) and metformin (MF) by the prepared hydrogels under influence of various parameters. The adsorbent GG-P(NIPAM--PAA)/GO(3 mg) chosen for adsorption activity as it displayed highest swelling capacity. The effect of amount of both adsorbents GG-P(NIPAM--PAA and GG-P(NIPAM--PAA)/GO(3 mg) showed that highest adsorption capacity found at 40 mg of adsorbents for both drugs at conditions: 100 mg/L concentration, 30 °C, 24 h and pH 6 and subsequently became stable. Both the drugs were removed in greater amount at 25 mg/L concentration, 24 h of contact time, 30 °C, 40 mg amount of both adsorbents and pH 6. Effect of time revealed that as time elevated from 2 h to 12 (100 mg/L concentration,, 30 °C, 40 mg amount of both adsorbents and pH 6) led to increase adsorption efficiency and after that increase time did not much impact on adsorption activity. Adsorption activity of hydrogels declined with increase of temperature (100 mg/L concentration, 12 h, 40 mg amount of both adsorbents and pH 6). The acidic conditions favored adsorption of SD while MF adsorbed under the weak acidic(100 mg/L concentration, 30 °C, 12 h, 40 mg amount of both adsorbents). However, basic conditions did not much influence on adsorption of MF but effected on adsorption activity of SD. Adsorption isotherm and kinetic model suggested that adsorption is homogenous and chemical in nature. The maximum adsorption capacity (q) found to be 289.01 and 154.55 mg/g for SD and MF respectively.
The online version contains supplementary material available at 10.1007/s40201-023-00867-w.
将生物聚合物印度树胶（GG）接枝到聚N-异丙基丙烯酰胺（PNIPAM）和聚丙烯酸（PAA）上，并负载氧化石墨烯（GO）。这项工作的目的是在各种参数的影响下，研究制备的水凝胶对双氯芬酸钠（SD）和二甲双胍（MF）的联合吸附。选择吸附剂GG-P（NIPAM-PAA）/GO（3mg）进行吸附活性研究，因为它表现出最高的溶胀能力。两种吸附剂GG-P（NIPAM-PAA）和GG-P（NIPAM-PAA）/GO（3mg）的用量影响表明，在100mg/L浓度、30°C、24小时和pH值为6的条件下，两种药物在40mg吸附剂时吸附容量最高，随后趋于稳定。在25mg/L浓度、24小时接触时间、30°C、40mg吸附剂用量和pH值为6的条件下，两种药物的去除量更大。时间影响表明，随着时间从2小时增加到12小时（100mg/L浓度、30°C、40mg吸附剂用量和pH值为6），吸附效率提高，之后时间增加对吸附活性影响不大。水凝胶的吸附活性随温度升高而下降（100mg/L浓度、12小时、40mg吸附剂用量和pH值为6）。酸性条件有利于SD的吸附，而MF在弱酸性条件下吸附（100mg/L浓度、30°C、12小时、40mg吸附剂用量）。然而，碱性条件对MF的吸附影响不大，但对SD的吸附活性有影响。吸附等温线和动力学模型表明吸附本质上是均匀的和化学的。SD和MF的最大吸附容量（q）分别为289.01和154.55mg/g。
在线版本包含可在10.1007/s40201-023-00867-w获取的补充材料。
