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首页> 外文期刊>RSC Advances >Adsorption behavior of methylene blue onto waste-derived adsorbent and exhaust gases recycling
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Adsorption behavior of methylene blue onto waste-derived adsorbent and exhaust gases recycling

机译：亚甲基蓝在源自废物的吸附剂上的吸附行为和废气再循环

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A waste-derived adsorbent was prepared from waste carbon, which was obtained from the production process of monosodium glutamate, by microwave heating under ultrasonic spray conditions for removing methylene blue (MB) from wastewater. The preparation process was performed at 840?°C for 17 min with an ultrasonic spray rate of 2 mL min?1 produced by ultrasonic spray equipment. Ultrasonic spray was successfully used for the preparation of an adsorbent from waste carbon for the first time. An adsorbent was also prepared under a steam atmosphere. The MB adsorption number of the adsorbent prepared under ultrasonic spray conditions increased by 15.27% in comparison to that prepared under a steam atmosphere under similar experimental conditions. The exhaust gases that were obtained during the preparation process of the adsorbent had a certain heating value, as the major components were carbon monoxide and hydrogen. The exhaust gases have promising utility as a heat source, which would significantly alter the commercial manufacturing process. The physicochemical properties of the adsorbent were investigated via N2 adsorption, TG/DTG, SEM, FTIR, XPS and zeta potential measurements. Analyses of the adsorption mechanism prove that CO bonds in the adsorbent play an important role in the adsorption process of MB, as proved by zeta potential measurements and XPS analysis. The above-mentioned analyses show that an adsorbent with good MB adsorption performance can be prepared from waste carbon under ultrasonic spray preparation conditions and fuel gas can be obtained at the same time, which achieves the comprehensive utilization of waste resources.
机译：由废碳制备废物衍生的吸附剂，该废碳是从味精生产过程中获得的，通过在超声波喷雾条件下微波加热以从废水中去除亚甲基蓝（MB）来制备的。制备过程在840°C下进行17分钟，超声喷涂设备以2 mL min ？1 的超声喷涂速率进行。超声波喷雾首次成功地用于从废碳中制备吸附剂。还在蒸汽气氛下制备了吸附剂。与在类似实验条件下在蒸汽气氛下制备的吸附剂相比，在超声喷涂条件下制备的吸附剂的MB吸附数增加了15.27％。在吸附剂的制备过程中获得的废气具有一定的热值，因为主要成分是一氧化碳和氢气。废气具有作为热源的前景广阔的用途，这将大大改变商业生产过程。通过 N 2 吸附，TG / DTG，SEM，FTIR，XPS和ζ电位测量研究了吸附剂的理化性质。吸附机理的分析证明，吸附剂中的CO键在MB的吸附过程中起着重要的作用，这由Zeta电位测量和XPS分析证明。上述分析表明，在超声波喷雾制备条件下，可以由废碳制备出具有良好MB吸附性能的吸附剂，同时可以得到燃料气体，实现了废物资源的综合利用。

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