NREM, National Centre for Earth Science Studies (NCESS), Ministry of Earth Sciences (MoES), Akkulam, Trivandrum 695031, India.
Department of Chemistry, Indian Institute of Space Science and Technology (IIST), Department of Space, Near LPSC, Valiamala Post, Trivandrum 695547, India.
Ecotoxicol Environ Saf. 2016 Feb;124:418-425. doi: 10.1016/j.ecoenv.2015.11.018. Epub 2015 Nov 21.
The prospective application of sulphurised activated carbon (SAC) as an ecofriendly and cost-effective adsorbent for Zinc(II) removal from aqueous phase is evaluated, with an emphasis on kinetic and isotherm aspects. SAC was prepared from sugarcane bagasse pith obtained from local juice shops in Sree Bhadrakali Devi Temple located at Ooruttukala, Neyyattinkara, Trivandrum, India during annual festive seasons. Activated carbon modified with sulphur containing ligands was opted as the adsorbent to leverage on the affinity of Zn(II) for sulphur. We report batch-adsorption experiments for parameter optimisations aiming at maximum removal of Zn(II) from liquid-phase using SAC. Adsorption of Zn(II) onto SAC was maximum at pH 6.5. For initial concentrations of 25 and 100mgL(-1), maximum of 12.3mgg(-1) (98.2%) and 23.7mgg(-1) (94.8%) of Zn(II) was adsorbed onto SAC at pH 6.5. Kinetic and equilibrium data were best described by pseudo-second-order and Langmuir models, respectively. A maximum adsorption capacity of 147mgg(-1) was obtained for the adsorption of Zn(II) onto SAC from aqueous solutions. The reusability of the spent adsorbent was also determined.
评价了硫磺化活性炭（SAC）作为一种环保且经济有效的吸附剂，从水相中去除锌（II）的应用前景，重点关注动力学和等温线方面。SAC 是由位于印度特里凡得琅的 Ooruttukala 的 Neyyattinkara 的 Sree Bhadrakali Devi 寺当地果汁店的甘蔗髓制备的。选择含有硫配体的活性炭进行改性作为吸附剂，以利用 Zn（II）对硫的亲和力。我们报告了批吸附实验，旨在通过使用 SAC 从液相中最大程度地去除 Zn（II）来优化参数。在 pH 6.5 时，SAC 对 Zn（II）的吸附达到最大值。对于初始浓度为 25 和 100mgL（-1）时，在 pH 6.5 下，SAC 对 Zn（II）的最大吸附量分别为 12.3mgg（-1）（98.2%）和 23.7mgg（-1）（94.8%）。动力学和平衡数据分别最好地由伪二阶和 Langmuir 模型描述。从水溶液中吸附 Zn（II）到 SAC 上获得了 147mgg（-1）的最大吸附容量。还确定了废吸附剂的可重复使用性。
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