Preferred Language
Articles
/
bsj-5842
Ammonia Removal in Free-Surface Constructed Wetlands Employing Synthetic Floating Islands: Employing synthetic floating islands
...Show More Authors

Free water surface constructed wetlands (FSCWs) can be used to complement conventional waste water treatment but removal efficiencies are often limited by a high ratio of water volume to biofilm surface area (i.e. high water depth). Floating treatment wetlands (FTWs) consist of floating matrices which can enhance the surface area available for the development of fixed microbial biofilms and provide a platform for plant growth (which can remove pollutants by uptake).  In this study the potential of FTWs for ammoniacal nitrogen (AN) removal was evaluated using experimental mesocosms operated under steady-state flow conditions with ten different treatments (two water depths, two levels of FTW mat coverage, two different plant densities and a control, all replicated three times). A simple model was constructed as a framework for understanding N dynamics in each treatment.  The model was calibrated using data obtained from one treatment and validated independently for the other treatments. Specifically, we hypothesized that the nitrification and volatilization rate constants are inversely proportional to water depth and proportional to mat surface area. This allowed the relative magnitude of different removal mechanisms to be estimated.  The model was able to predict steady-state concentrations of AN and total oxidized nitrogen (TON) across the different treatments well (values for correlation in the regression between measured and predicted steady-state concentrations and RMSE were 0.88 and 0.40 mg N L-1 for AN, and 0.63 and 1.75 mg N L-1 for TON).  The results confirm that nitrification is the principal AN removal process, with maximum removal occurring in shallow systems with high matrix cover (i.e. a high ratio of biofilm surface area to water volume). Plant uptake was a relatively minor loss process compared to nitrification. Integrated experimental and model-based approach was found to be a useful tool to improve mechanistic understanding AN dynamics in FSCWs and system performance.

 

Scopus Clarivate Crossref
View Publication Preview PDF
Quick Preview PDF
Publication Date
Thu Dec 01 2016
Journal Name
مجلة كلية الحقوق جامعة النهرين
دور المبادئ العامة للقانون في إطار التجارة الدولية
...Show More Authors

المبادئ العامة للقانون ودرها في اطار التجارة الدولية

Publication Date
Tue Jan 29 2019
Journal Name
Arab Science Heritage Journal
منهجَ المسعودي و إسهاماته في الجغرافية و التاريخ
...Show More Authors

للشعب العربي ولع عميق و ميل شديد إلى الأسفار و الإنتقال من بلد إلى آخر ، لا تثنيهم عن ذلك صحارى واسعة و لابحار شاسعة أو مشاق عنيفة . و قد توارثوا هذا الميل منذ زمن قديم فأوغلوا في قارة آسيا و أفريقيا و أوربا وغيرها . و شقت سفنهم الخليج العربي و المحيط الهندي و البحر المتوسط و بحار اخرى . و لعل هذا الميل إلى الأسفار و الولع بالاغتراب قد عبًر عن نفسه بصورة أدبية في قصص السندباد و بصورة فعلية برحلة إبن جبير و رحلة إبن

... Show More
View Publication Preview PDF
Publication Date
Wed May 02 2012
Journal Name
Journal Of Planner And Development
the planning and design characteristics of Iraqs mud building and settlement
...Show More Authors

The Mesopotamian soil is muddy and fertile, and so from ancient eras Iraqis used mud in their building, settlements and architecture in different methodologies according to the nature and the function of the building that was either in its pure form or by mixing it with other materials such as straw . also as raw bricks in different ways either for the whale building or parts of it, or for the finishing parts such as roofing for instance. In this research these different forms and methodologies will permeate through out a chosen examples of historical building, rural buildings and settlements and ancient buildings as well as some current uses of mud in the structures and building in standing cities, this in order to conclude some

... Show More
View Publication
Publication Date
Sun Jan 26 2020
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
أثر استخدام التوقيع الرقمي في العمليات المصرفية الالكترونية
...Show More Authors

The purpose of this research is to identify the E-signing and its concept.

Due to the increasing role and importance of the E-trade in may countries, as it provide many advantages over the traditional trade. We have to deal with may E-trade aspects and tools in which the E-signing is the most important. In this research we will deal: first with the article approach- E-signing definition, Digital signing, its mechanism, requirements, types and features. Second: the practical approach: It has been implemented according to a questionnaire contain many questions some of them are comma, other an specialized in research hypothesis and some concern the obstacles faced the application of E-signing. The questionnaires been distillated to

... Show More
View Publication Preview PDF
Publication Date
Mon Jul 01 2019
Journal Name
في مجلة التراث العلمي العربي
إستراتيجيّةُ المشاكلةِ في القرآن ( مِنَ التّسلّطِ إلى السّلطة)
...Show More Authors

توافدت إلى الساحة النقدية اللغوية والأدبية الحديثة مصطلحات من بيئات مختلفة، امتلك بعضها فضيلة المواءمة لمشارب متنوعة مما أهّله لإمامة العنوان في دراسات متعددة ،هذا ما كان من شأن( استراتيجية) ذلك المصطلح العسكري الرحّال إلى حقول العلوم الإنسانية ،فلقدرته التفاعلية استقبلته في حضرة البلاغة رفيقاً لمحسن بديعي تسلّط في التصوّر المنهجي بمفهوم الانسجام اللفظي، ذلك هو( المشاكلة) التي تعني ذكر الشيء بلفظ غيره لوق

... Show More
Publication Date
Sun Oct 21 2018
Journal Name
Journal Of Planner And Development
التمكين الإقتصادي للمرأة الريفية ودورها في التنمية المستدامة
...Show More Authors

View Publication Preview PDF
Publication Date
Sat Mar 01 2014
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
دور محاسبة التكاليف في إبلاغ الإدارة بتكاليف الجودة
...Show More Authors

Due to the great technical developments in the field of informational knowledge, technological and productive changes and intense competition among institutes in the era of globalization, focus of these institutes on the notion of total quality management has been increased. Quality costs have represented an essential ratio of the production costs, a matter that requires preparing information about these costs, Because of that, the need for preparation and availability of accounting information system to measure and prove these costs has been emerged.

        The descriptive analytic method has been used here to answer the questions raised in this study. Among the results that have been reached

... Show More
View Publication Preview PDF
Crossref
Publication Date
Tue Jun 30 2020
Journal Name
Journal Of Economics And Administrative Sciences
The Impact of Merger strategy on human resources management practices
...Show More Authors

The current research aims to test the impact of the strategy of merger (as an explanatory variable) in human resources management practices (as a response variable), and the importance of the subject being an important topic that mimics the Iraqi environment, where has seen many mergers that have not been addressed by former researchers in the field. In addition, the future prospects carry many mergers, and the problem of research was the lack of understanding among departments in how to manage the integration and deal with it, on the basis of scientific which reflected negatively on the practices of human resources management, and the research was based on two main hypotheses Six sub-hypotheses emerge to explore the correlation

... Show More
View Publication Preview PDF
Crossref (1)
Crossref
Publication Date
Wed Mar 30 2016
Journal Name
College Of Islamic Sciences
Methods of Quran inference On the existence of the Creator of sleep
...Show More Authors

The issue, the existence of God Almighty, and the creativity of the universes including the whale, and assets and how diversified, and faith in him and his lordship and divinity, is a delicate issue, and very important and dangerous, and it occupied human thought old and new, and still occupy it until God takes the land and on it. Many complex issues of thought, behavior, and ethics have resulted in the belief of many communities in the existence of the Almighty, having ruled their minds, depicting their beliefs and distancing their thoughts about slippage and abuse. When they looked at the wonders of creatures and the minutes of the assets, they thought about the planetary and astronomical motion systems. His existence was denied by ath

... Show More
View Publication Preview PDF
Publication Date
Sun Oct 06 2019
Journal Name
دار الضياء للطباعة والتصميم
موسوعة الدراسات العاملية في المجال الرياضي ( الجزء الثاني )
...Show More Authors

أن الكتاب في مجال الاختبارات والقياس والإحصاء الرياضي والذي صيغ بطريقة مبسطة وعلى وفق الفعالية التي تم تناولها بالبحث والدراسة سواء أكانت الدراسة في الجانب البدني أو المهاري أو الوظيفي للعبة أو تبحث في المواصفات الجسمية من ناحيتي القياسات والأدلة الجسمية وكل بصورة منفردة ، أو بصورة دراسة مركبة من ناحية تناول القياسات الجسمية مع المتغيرات البدنية لفعالية ما على سبيل المثال وتناولهما في دراسة واحدة أو تناول

... Show More