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Water
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Advances in Constructed Wetland
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Advances in Constructed Wetland

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (25 November 2019) | Viewed by 7968

Special Issue Editors

Prof. Dr. Alan Howard

E-Mail Website
Guest Editor
Department of Geography and Environmental Science University of Reading , Reading, RG6 6AB, UK
Interests: constructed wetlands; cyanobacteria; water resource management; computer
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Defu Xu

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 210044 Nanjing, China
Interests: wetland plants; substrate; enzyme; clogging; purifying capacity; nitrogen; phosphorus
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The use of constructed wetland systems for purifying wastewater is an area of increasing importance in water resources management. Such systems typically include a combination of substrate, wetland plants, microorganisms, and fauna, such as earthworms. The efficiency of purification depends on multiple factors, including wastewater composition and, over time, the susceptibility to clogging of the constucted wetland system. Therefore, the design and management of constructed wetland systems are very important in maintaining the purifying capacity and sustainability of a system. This Special Issue of Water focuses on advances in constructed wetland systems research, including developments in the implementation of effective constructed wetlands.

Prof. Dr. Alan Howard
Prof. Dr. Defu Xu
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. Water 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 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

  • constructed wetlands
  • wastewater
  • wetland plants
  • water resources management
  • purification

Published Papers (2 papers)

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Research

17 pages, 4007 KiB  
Article
Performance and Kinetics of a Pond-Constructed Wetland System Treating Beef Manure Pile and Exercise Yard Runoff in Eastern Ontario
by Juliana Mejia-Franco, Chris Kinsley and Robert Delatolla
Water 2020, 12(1), 168; https://doi.org/10.3390/w12010168 - 7 Jan 2020
Cited by 4 | Viewed by 2657
Abstract
Runoff from manure piles and permanent outdoor confinement areas are common sources of pollution from livestock operations, which must be properly managed in accordance with local environmental regulations. Seven months of performance data from a pond-free water surface constructed wetland system receiving cattle [...] Read more.
Runoff from manure piles and permanent outdoor confinement areas are common sources of pollution from livestock operations, which must be properly managed in accordance with local environmental regulations. Seven months of performance data from a pond-free water surface constructed wetland system receiving cattle feedlot runoff in Eastern Ontario, Canada, were used to evaluate performance and quantify first-order reaction rate constants (k) for organic matter and nutrients. Kinetic values were shown to be strongly temperature dependent and to adequately represent average treatment over the operating season; however, k values varied significantly on shorter time scales due to the event-based nature of the treatment system. Plant (duckweed) uptake of soluble phosphorus and ammonia in the pond was shown to be a predominant mechanism of nutrient removal. The pond-wetland system was effective at reducing biological oxygen demand (BOD5) by 67%, total phosphorus (TP) by 45%, and total nitrogen (TN) by 64%, providing a cost-effective and appropriate solution for beef producers. Full article
(This article belongs to the Special Issue Advances in Constructed Wetland)
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16 pages, 3136 KiB  
Article
Phosphorus and Nitrogen Adsorption Capacities of Biochars Derived from Feedstocks at Different Pyrolysis Temperatures
by Lei Zhou, Defu Xu, Yingxue Li, Qianchen Pan, Jiajun Wang, Lihong Xue and Alan Howard
Water 2019, 11(8), 1559; https://doi.org/10.3390/w11081559 - 28 Jul 2019
Cited by 41 | Viewed by 5042
Abstract
This study investigates the P and NO3− adsorption capacities of different biochars made from plant waste including rice straw (RSB), Phragmites communis (PCB), sawdust (SDB), and egg shell (ESB) exposed to a range of pyrolysis temperatures (300, 500 and 700 °C). [...] Read more.
This study investigates the P and NO3− adsorption capacities of different biochars made from plant waste including rice straw (RSB), Phragmites communis (PCB), sawdust (SDB), and egg shell (ESB) exposed to a range of pyrolysis temperatures (300, 500 and 700 °C). Results indicate that the effect of pyrolysis temperature on the physiochemical properties of biochar varied with feedstock material. Biochars derived from plant waste had limited adsorption or even released P and NO3−, but adsorption of P capacity could be improved by adjusting pyrolysis temperature. The maximum adsorption of P on RSB700, PCB300, and SDB300, produced at pyrolysis temperature of 700, 300 and 300 °C, was 5.41, 7.75 and 3.86 mg g−1, respectively. ESB can absorb both P and NO3−, and its adsorption capacity increased with an increase in pyrolysis temperature. The maximum NO3− and P adsorption for ESB700 was 1.43 and 6.08 mg g−1, respectively. The less negative charge and higher surface area of ESB enabled higher NO3− and P adsorption capacity. The P adsorption process on RSB, PCB, SDB and ESB, and the NO3− adsorption process on ESB were endothermic reactions. However, the NO3− adsorption process on RSB, PCB and SDB was exothermic. The study demonstrates that the use of egg shell biochar may be an effective way to remove, through adsorption, P and NO3− from wastewater. Full article
(This article belongs to the Special Issue Advances in Constructed Wetland)
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