Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
2.5
2.6
Journals
Separations
Special Issues
Separation in Agricultural Waste Utilization
share announcement

Separation in Agricultural Waste Utilization

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Environmental Separations".

Deadline for manuscript submissions: closed (10 April 2024) | Viewed by 1303

Special Issue Editors

Dr. Lianzhu Du

E-Mail Website
Guest Editor
Agro-Environmental Protection Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Tianjin 300191, China
Interests: nutrient recovery; resource recycling; removal; biological methods; physicochemical methods
Dr. Suli Zhi

E-Mail Website
Guest Editor
Agro-Environmental Protection Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Tianjin 300191, China
Interests: nutrient recovery; resources recycling; remove; biological methods; physicochemical methods
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The phenomena of resource excess and pollution coexist in agriculture. In the contemporary world, addressing such concerns is no longer a simple matter of treating polluting substances or waste. Indeed, the question of how to separate, extract and transform useful components in agricultural waste in order to achieve reductions in carbon emission, as well as the recovery, recycling and reuse of resources or nutrients, will be important. For example, agricultural sewage contains high concentrations of nitrogen and phosphorus substances that discharge excessive quantities of non-point-source pollutants into the environment. If these nitrogen and phosphorus precipitations can be for used in slow-release fertilizer, this development will be of great significance. The primary purpose of this Special Issue is to gather scholars’ experience regarding related technologies, measures, policies and the management of agricultural resource recycling models. We aim to promote the development of low-carbon, green and circular agriculture.

Dr. Lianzhu Du
Dr. Suli Zhi
Guest Editors

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. Separations is an international peer-reviewed open access monthly 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 2600 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

  • nutrient recovery
  • resources recycling
  • removal
  • biological methods
  • physicochemical methods

Published Papers (1 paper)

Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

17 pages, 4438 KiB  
Article
Preparation and Application of Si@Al Adsorbents for Different Pollutants Removal from Aqueous Solution
by Xiaoyu Xu, Jiahua Liu, Yuang Cao, Han Wang, Keqiang Zhang, Chein-Chi Chang and Suli Zhi
Separations 2024, 11(1), 29; https://doi.org/10.3390/separations11010029 - 12 Jan 2024
Viewed by 1153
Abstract
This study tried to use electroflocculating precipitated waste to prepare a Si@Al adsorbent by simply mixing sodium silicate at a mass ratio of 4:1 and calcining at 200 °C for 2 h. The adsorbent was low cost, high efficiency, and could remove a [...] Read more.
This study tried to use electroflocculating precipitated waste to prepare a Si@Al adsorbent by simply mixing sodium silicate at a mass ratio of 4:1 and calcining at 200 °C for 2 h. The adsorbent was low cost, high efficiency, and could remove a variety of contaminants (organic pollutants, antibiotics, and metal ions) from water. In this study, adsorbent characterization and pollutant adsorption experiments were carried out. The results showed that: Si@Al adsorbent had uniform particles, distinct layers, a loose porous appearance, and the internal structure was scattered without a crystal structure. The optimal adsorption conditions for tetracycline were as follows: dosage of adsorbent 2.0 g/L, reaction time 10 min, pH = 4.5, and tetracycline removal rate of 97.13%. The optimal adsorption conditions for MB (MB stands for methylene blue) were an adsorption dosage of 4.0 g/L, a reaction time of 15 min, pH = 4.5–8.5, and a removal rate of 96.39%. The optimal adsorption conditions for Cu were a 2.0 g/L dosage of adsorbent, a reaction time of 30 min, a pH of 8.5, and a highest removal rate of 97.47%. It was worth noting that the effect of temperature on TC, MB and Cu was not significant. At the same time, the kinetic fitting results showed that the adsorption of MB was more consistent with the quasi-second-order kinetic model, with R2 ranging from 0.9788 to 1.0000. The adsorption of TC and Cu was more consistent with the quasi-first-order kinetic model, with R2 ranging from 0.9598 to 0.9999 and 0.9844 to 0.9988, respectively. According to the results of thermodynamics, kinetics and zero potential point, the adsorption of tetracycline and methylene blue was mainly a physical adsorption, multilayer heterogeneous or single-layer homogeneous adsorption process. The adsorption of Cu was categorized as multi-layer heterogeneous chemical adsorption. The co-existing substances had little effect on the properties of the adsorbent, and the adsorbent could be recycled 5 times. Compared with other adsorbents, the results showed that the adsorbents had obvious advantages in terms of the raw material source, preparation method, time cost and removal effect. This study provided a “waste into treasure, green and efficient” multi-pollutant adsorption method. Full article
(This article belongs to the Special Issue Separation in Agricultural Waste Utilization)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-1
Back to TopTop