Biomass Conversion and Biorefinery ( IF 3.5 ) Pub Date : 2022-01-15 , DOI: 10.1007/s13399-021-02186-2 Sadamanti Sireesha 1 , Utkarsh Upadhyay 1 , Inkollu Sreedhar 1
|
In this study, the hierarchical screening was done for the selection of the best bio-sorbent for the adsorption of heavy metal ions. Cotton husk, corn cob, neem leaves, Delonix leaves (Gulmohar), Spathodea campanulata leaves (African tulip), orange peel, dried Tabebuia argentea flower (The tree of gold), sweet lemon peel, red gram seed coat, and Delonix regia were employed for adsorption of nickel and copper ions from aqueous solution and finally, the engineered orange peel biochar, which was found to be best performing material (with removal efficiency equal to 96% and 98% for copper and nickel, respectively), was screened out for subsequent studies. Characterization of the orange peel Biochar was carried out by SEM, BET, and FTIR techniques. From BET analysis, it was found that pyrolization of orange peel biomass increased its surface area from 52 to 230 m2−g−1. The operating parameters of the adsorption batch process were optimized via response surface methodology to maximize the adsorbent utilization and to minimize the cost of the adsorption process. The optimized value of metal removal percentage obtained equaled to 99.5% and 92.4% for nickel and copper ions, respectively, with orange peel biochar as adsorbent. 0.8 M \({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\) was used for the desorption of copper and nickel from orange peel biochar and it showed a desorption efficiency of 93.44% and 92.0%, respectively. The engineered orange peel biochar showed reusability up to 5 cycles for copper and nickel and therefore can be considered low-cost and efficient bio-sorbent to remove heavy metal ions.
Graphical abstract
中文翻译：
使用新型生物质和生物炭基吸附剂从水溶液中去除重金属的比较研究：表征、工艺优化和再生
在这项研究中，进行了分级筛选，以选择吸附重金属离子的最佳生物吸附剂。棉壳、玉米芯、印楝叶、Delonix 叶子 (Gulmohar)、Spathodea campanulata叶子 (非洲郁金香)、橙皮、干Tabebuia argentea花 (黄金树)、甜柠檬皮、红克种皮和Delonix regia用于从水溶液中吸附镍和铜离子，最后筛选出性能最佳的工程橙皮生物炭（铜和镍的去除效率分别为 96% 和 98%）。用于后续研究。通过 SEM、BET 和 FTIR 技术对橙皮生物炭进行表征。从 BET 分析中发现，橙皮生物质的热解使其表面积从 52 增加到 230 m 2− g -1. 通过响应面法优化吸附间歇过程的操作参数，以最大限度地提高吸附剂利用率并最大限度地降低吸附过程的成本。以橘皮生物炭为吸附剂，镍离子和铜离子的金属去除率优化值分别为99.5%和92.4%。0.8 M \({\mathrm{H}}_{2}{\mathrm{SO}}_{4}\)用于从橘皮生物炭中解吸铜和镍，解吸效率为 93.44%和 92.0%，分别。工程橙皮生物炭对铜和镍显示出高达 5 次循环的可重复使用性，因此可以被认为是去除重金属离子的低成本和高效的生物吸附剂。
京公网安备 11010802027423号