当前位置: X-MOL 学术Biomass Convers. Biorefin. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Evaluation of the adsorptive removal of cationic dyes by greening biochar derived from agricultural bio-waste of rice husk
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2021-03-13 , DOI: 10.1007/s13399-021-01415-y
Praveen Saravanan , Jegan Josephraj , Bhagavathi Pushpa Thillainayagam , Gokulan Ravindiran

In this study, biochar derived from agricultural bio-wastes of rice husk was used as a biosorbent for dye sequestration of Basic Blue 41 (BB41) and Basic Red 09 (BR09) from the aqueous solution. The structural characteristics of the biochar were performed through TGA, BET, SEM, EDX, and FTIR. The experimental conditions proved that 80% of dye removal was attained in the optimal operating conditions (dosage of 6 g L−1 (BB41), 1 g L−1 (BR09), pH of 7 (BB41) and 8 (BR09), temperature of 35 °C, and initial dye concentration of 50 mg L−1). Four different isotherms models were used to describe the adsorption process. Based on the correlation coefficient and percentage of error values, BB41 and BR09 sorption revealed that Langmuir model has better fit when compared to other models. The maximum adsorption capacities of BB41 and BR09 on rice husk biochar are 17.596 mg g−1 and 168.49 mg g−1, respectively. The thermodynamic parameters △H < 0 and △G < 0 indicated that the whole adsorption process of rice husk biochar to BB41 and BR09 is exothermic and spontaneous at low temperature. The regeneration studies were carried out with different elutants to confirm the elution efficiency of the sorbent. The results indicate the biochar derived from agricultural bio-waste of rice husk was a potentially greening biosorbent for the dye sequestration from wastewater.

Graphical abstract



中文翻译:

稻壳农业生物废料中生物炭的绿化对阳离子染料吸附去除的评价

在这项研究中,来源于稻壳的农业生物废料的生物炭被用作从水溶液中固溶碱性蓝41(BB41)和碱性红09(BR09)的染料的生物吸附剂。生物炭的结构特征通过TGA,BET,SEM,EDX和FTIR进行。实验条件证明,在最佳操作条件下(6 g L -1(BB41),1 g L -1(BR09),pH 7(BB41)和8(BR09),温度为35°C,初始染料浓度为50 mg L -1)。四种不同的等温线模型被用来描述吸附过程。根据相关系数和误差值的百分比,BB41和BR09的吸附表明,与其他模型相比,Langmuir模型具有更好的拟合度。BB41和BR09在稻壳生物炭上的最大吸附容量分别为17.596 mg g -1和168.49 mg g -1。热力学参数△ H  <0和△ G <0表示稻壳生物炭对BB41和BR09的整个吸附过程在低温下是放热的和自发的。用不同的洗脱液进行再生研究,以确认吸附剂的洗脱效率。结果表明,源自稻壳农业生物废料的生物炭是一种潜在的绿色生物吸附剂,可用于废水中的染料螯合。

图形概要

更新日期:2021-03-15
down
wechat
bug