四种碳质吸附剂对苯酚吸附性能的比较评价

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2016-02-01 DOI:10.1080/09542299.2015.1136570

Dingfeng Jin, Yuanjun Xu, Ming Zhang, Yeongsang Jung, Y. Ok

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引用次数: 8

摘要

摘要研究了活性炭(AC)、介孔碳(MPC)、竹木生物炭(BBC)和橡木生物炭(OBC)对苯酚的吸附动力学和等温线。在拟二级动力学模型中，MPC的吸附速率常数和初始吸附速率h表示MPC具有最快的吸附速率和初始吸附势。MPC的有序直孔结构有利于苯酚的可及性。根据Langmuir模型计算，活性炭对苯酚的最大吸附量为123 mg/g。苯酚分子与AC发生π -π电子-给体-受体相互作用，具有较强的结合力，具有较高的比表面积、复杂的孔结构。与MPC (73.00 mg/g)和AC相比，BBC和OBC的吸附速度慢得多，吸附量也低得多(分别为33.04和29.86 mg/g)，表明其对水中苯酚的去除效果不显著。

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Comparative evaluation for the sorption capacity of four carbonaceous sorbents to phenol

Abstract Sorption kinetics and isotherms of phenol by four carbonaceous sorbents (activated carbon (AC), mesoporous carbon (MPC), bamboo biochar (BBC) and oak wood biochar (OBC)) were compared in this study. MPC has the fastest sorption rate and initial sorption potential, which were indicated by sorption rate constants and initial sorption rate “h” in a pseudo-second-order kinetic model. The ordered and straight pore structure of MPC facilitated the accessibility of phenol. The AC showed the greatest sorption capacity towards phenol with maximum sorption of 123 mg/g as calculated by the Langmuir model. High surface area, complexity of pore structure, and the strong binding force of the π–π electron-donor-acceptor interaction between phenol molecules and AC were the main mechanisms. The BBC and OBC had much slower sorption and lower sorption capacity (33.04 and 29.86 mg/g, respectively), compared to MPC (73.00 mg/g) and AC, indicating an ineffective potential for phenol removal from water.

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.