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Applied Sciences
Special Issues
New Frontiers in Ecofriendly Waste Treatment: Reduce, Reuse and Recycle
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New Frontiers in Ecofriendly Waste Treatment: Reduce, Reuse and Recycle

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (20 December 2021) | Viewed by 2853
Related Conference: 2nd International Conference on Sustainable Solid Waste Treatment and Management

Special Issue Editor

Prof. Dr. Zengqiang Zhang

E-Mail Website
Guest Editor
College of Natural Resources and Environment, Northwest A & F University, Yangling 712100, China
Interests: waste treatment; soil heavy metal pollution monitoring
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The production of solid waste accompanies the development of human society, upon which it has a serious negative impact. The treatment and disposal of solid waste is faced with many challenges due to its large quantity and varying nature. With the increase in population and the aggravation of natural resource constraints, ensuring the harmless treatment and resource utilization of solid waste has become a direction of future development. The harmless treatment of solid waste can be divided into physical, chemical, and biological treatments according to the nature of solid waste, in which biological treatment is being paid increasing attention because of its low cost, environmentally friendliness, and high degree of resource utilization. The biological treatment of solid waste, especially organic solid waste, will become the main direction of resource recovery in the future.

The purpose of this Special Issue is therefore to disseminate the results of research into bio-based solid waste treatment and management. Particular attention will be given to those studies that address organic solid waste biotreatment, organic waste to biochar, and nanotechnology applications in solid waste treatment.

Prof. Dr. Zengqiang Zhang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • solid waste
  • anaerobic digestion
  • aerobic fermentation
  • biochar
  • nanotechnology
  • greenhouse gas
  • environmental remediation

Published Papers (1 paper)

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Research

14 pages, 2785 KiB  
Article
From Feather to Adsorbent: Keratin Extraction, Chemical Modification, and Fe(III) Removal from Aqueous Solution
by Sujuan Pan, Changqing Wang, Yibo Wang and Rongmin Wang
Appl. Sci. 2021, 11(24), 12163; https://0-doi-org.brum.beds.ac.uk/10.3390/app112412163 - 20 Dec 2021
Viewed by 2394
Abstract
In this work, feather keratin was extracted from the waste feather of chicken via alkyd pretreatment and reduction method, the extraction rate is above 85%. The molecular weight and aggregation morphology of feather keratin in an aqueous environment were characterized by 18-angle laser [...] Read more.
In this work, feather keratin was extracted from the waste feather of chicken via alkyd pretreatment and reduction method, the extraction rate is above 85%. The molecular weight and aggregation morphology of feather keratin in an aqueous environment were characterized by 18-angle laser light scattering gel permeation chromatography and field emission transmission electron microscopy. The relationship between the structure and properties of feather keratin is discussed. The 1-(3-dimethylaminopropyl) -3-ethylcarbondiimide hydrochloride and N-hydroxysuccinimide were used as activation system and cross-linkage. The gallic acid was used as modification reagent and was bonded to feather keratin chains; meanwhile, feather keratin chains were cross-linked through covalent bonds obtained the novel adsorbent (named as GA-FK gel). The GA-FK gel was investigated by IR, SEM, TGA, XRD, and BET methods. The results indicated that GA molecules successfully bonded to feather keratin chains and cross-linked between feather keratin chains. The GA-FK gel was found to have a three-dimensional network structure with abundant mesopores. Its pore size range is 1.8~90 nm; average pore size is 19.6 nm. Its specific surface area is 7.17 m2·g−1. In addition, GA-FK gel was applied to remove Fe(III) in water. The maximum adsorption capacity was 319.0 mg·g−1. The adsorption process of GA-FK gel to Fe(III) presents a typical two-stage pattern accompanied with swelling. The adsorption kinetics of GA-FK gel to Fe(III) follows the quasi-second-order model, the adsorption isotherm follows the Freundlich model. Therefore, the adsorption mechanism is non-specific adsorption. Full article
(This article belongs to the Special Issue New Frontiers in Ecofriendly Waste Treatment: Reduce, Reuse and Recycle)
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