Application of mesoporous zirconia coating on coal cinder for inorganic arsenic removal from aqueous solution

2014 ◽  
Author(s):  
Xiaoshu Wei ◽  
Yiwei Wu ◽  
Jing Guo ◽  
Hongli Sun ◽  
Yang Yu
Keyword(s):  
Aqueous Solution ◽  
Arsenic Removal ◽  
Inorganic Arsenic ◽  
Zirconia Coating ◽  
Mesoporous Zirconia

Effect of physico-chemical parameters on inorganic arsenic removal from aqueous solution using a forward osmosis membrane

2014 ◽  
Vol 2 (3) ◽  
pp. 1309-1316 ◽  
Author(s):  
Priyanka Mondal ◽  
Nick Hermans ◽  
Anh Thi Kim Tran ◽  
Yang Zhang ◽  
Yanyan Fang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Arsenic Removal ◽  
Forward Osmosis ◽  
Inorganic Arsenic ◽  
Chemical Parameters ◽  
Physico Chemical

scholarly journals The sorption of inorganic arsenic on modified sepiolite: Effect of hydrated iron(III)-oxide

2014 ◽  
Vol 79 (7) ◽  
pp. 815-828 ◽  
Author(s):  
Nikola Ilic ◽  
Slavica Lazarevic ◽  
Vladana Rajakovic-Ognjanovic ◽  
Ljubinka Rajakovic ◽  
Djordje Janackovic ◽  
...  
Keyword(s):  
Sorption Capacity ◽  
Arsenic Removal ◽  
Ph Value ◽  
Inorganic Arsenic ◽  
Arsenic Species ◽  
Deionized Water ◽  
Order Kinetic ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Pseudo Second Order

The sorption of inorganic arsenic species, As(III) and As(V), from water by sepiolite modified with hydrated iron(III) oxide was investigated at 25 ?C through batch studies. The influence of the initial pH value, the initial As concentrations, the contact time and types of water on the sorption capacity was investigated. Two types of water were used, deionized and groundwater. The maximal sorption capacity for As(III) from deionized water was observed at initial and final pH value 7.0, while the bonding of As(V) was observed to be almost pH independent for pH value in the range from 2.0 to 7.0, and the significant decrease in the sorption capacity was observed at pH values above 7.0. The sorption capacity at initial pH 7.0 was about 10 mg g?1 for As(III) and 4.2 mg g?1 for As(V) in deionized water. The capacity in groundwater was decreased by 40 % for As(III) and by 20 % for As(V). The Langmuir model and pseudo-second order kinetic model revealed good agreement with the experimental results. The results show that Fe(III)-modified sepiolite exhibits significant affinity for arsenic removal and it has a potential for the application in water purification processes.

Arsenic Speciation: Reduction of Arsenic(V) to Arsenic(III) by Fulvic Acid

2006 ◽  
Vol 3 (2) ◽  
pp. 137 ◽  
Author(s):  
Tsanangurayi Tongesayi ◽  
Ronald B. Smart
Keyword(s):  
Fulvic Acid ◽  
Arsenic Removal ◽  
Research Effort ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Stripping Voltammetry ◽  
Reduction Reaction ◽  
Cathodic Stripping Voltammetry ◽  
Suwannee River Fulvic Acid ◽  
Removal Technologies

Environmental Context.Most technologies for arsenic removal from water are based on the oxidation of the more toxic and more mobile arsenic(iii) to the less toxic and less mobile arsenic(v). As a result, research effort has been focussed on the oxidation of arsenic(iii) to arsenic(v). It is equally important to explore environmental factors that enhance the reduction of arsenic(v) to arsenic(iii). An understanding of the redox cycling of arsenic could result in the development of cheaper and more efficient arsenic removal technologies, especially for impoverished communities severely threatened by arsenic contamination. Abstract.The objective of this study was to investigate the reduction of inorganic arsenic(v) with Suwannee River fulvic acid (FA) in aqueous solutions where pH, [FA], [As(v)], [As(iii)], and [Fe(iii)] were independently varied. Samples of inorganic As(v) were incubated with FA in both light and dark at constant temperature. Sterilisation techniques were employed to ensure abiotic conditions. Aliquots from the incubated samples were taken at various time intervals and analysed for As(iii) using square-wave cathodic-stripping voltammetry at a hanging mercury drop electrode. The study demonstrated the following important aspects of As speciation: (1) FA can significantly reduce As(v) to As(iii); (2) reduction of As(v) to As(iii) is a function of time; (3) both dark and light conditions promote reduction of As(v) to As(iii); (4) Fe(iii) speeds up the reduction reaction; and (5) oxidation of As(iii) to As(v) is promoted at pH 2 more than at pH 6.

Preparation of Fe-SBC from Urban Sludge for Organic and Inorganic Arsenic Removal

2019 ◽  
Vol 19 (5) ◽  
pp. 2658-2663 ◽  
Author(s):  
Min-Fa Lin ◽  
Nhat-Thien Nguyen ◽  
Chang-Tang Chang ◽  
Po-Han Chen
Keyword(s):  
Arsenic Removal ◽  
Inorganic Arsenic

scholarly journals An in vitro evaluation of the zirconia surface treatment by mesoporous zirconia coating on its bonding to resin cement

2014 ◽  
Vol 24 (6) ◽  
pp. 2109-2116
Author(s):  
Yanli Zhang ◽  
Ting Sun ◽  
Ruoyu Liu ◽  
Xiaoli Feng ◽  
Aijie Chen ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Resin Cement ◽  
Zirconia Coating ◽  
In Vitro Evaluation ◽  
Mesoporous Zirconia

scholarly journals Nanofiltration for Arsenic Removal: Challenges, Recent Developments, and Perspectives

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1323 ◽  
Author(s):  
TA Siddique ◽  
Naba K. Dutta ◽  
Namita Roy Choudhury
Keyword(s):  
Drinking Water ◽  
Arsenic Removal ◽  
Environmental Concern ◽  
Low Cost ◽  
Inorganic Arsenic ◽  
Water Security ◽  
Polymer Nanocomposite ◽  
Life Forms ◽  
Current Status ◽  
The Status

Arsenic (As) removal is of major significance because inorganic arsenic is highly toxic to all life forms, is a confirmed carcinogen, and is of significant environmental concern. As contamination in drinking water alone threatens more than 150 million people all over the world. Therefore, several conventional methods such as oxidation, coagulation, adsorption, etc., have been implemented for As removal, but due to their cost-maintenance limitations; there is a drive for advanced, low cost nanofiltration membrane-based technology. Thus, in order to address the increasing demand of fresh and drinking water, this review focuses on advanced nanofiltration (NF) strategy for As removal to safeguard water security. The review concentrates on different types of NF membranes, membrane fabrication processes, and their mechanism and efficiency of performance for removing As from contaminated water. The article provides an overview of the current status of polymer-, polymer composite-, and polymer nanocomposite-based NF membranes, to assess the status of nanomaterial-facilitated NF membranes and to incite progress in this area. Finally, future perspectives and future trends are highlighted.

Arsenic removal from aqueous solution using pyrite

2014 ◽  
Vol 84 ◽  
pp. 526-532 ◽  
Author(s):  
Gülay Bulut ◽  
Ünzile Yenial ◽  
Emrecan Emiroğlu ◽  
Ayhan Ali Sirkeci
Keyword(s):  
Aqueous Solution ◽  
Arsenic Removal
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