scholarly journals Hybrid Pectin-Based Sorbents for Cesium Ion Removal

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2160
Author(s):  
Joanna Bok-Badura ◽  
Agata Jakóbik-Kolon ◽  
Alicja Kazek-Kęsik ◽  
Krzysztof Karoń
Keyword(s):  
Prussian Blue ◽  
Sorption Capacity ◽  
Removal Efficiency ◽  
Cesium Removal ◽  
Ion Removal ◽  
Cesium Ions ◽  
Cesium Ion ◽  
Hybrid Sorbent ◽  
Ph Range

In this paper, beads-shaped hybrid sorbents composed of pectin and Prussian blue were prepared. Various ratios of pectin and Prussian blue in hybrid sorbents were tested. Obtained sorbents had high and roughly constant sorption capacity in a broad pH range (4–10), in which also the swelling index and stability of sorbents were satisfactory. The preliminary sorption studies proved that almost 100% of cesium removal efficiency may be achieved by using the proper sorbent dose. The sorption capacity of the hybrid sorbent with a 1:1 ratio of pectin to Prussian blue equaled q = 36.5 ± 0.8 mg/g (dose 3 g/L, pH = 6, temp. = 22 ± 1 °C, t = 24 h). The obtained results showed that the prepared hybrid pectin-based sorbents are promising for cesium ions removal.

Use of bentonite to control the release of copper from contaminated soils

Soil Research ◽  
2007 ◽  
Vol 45 (8) ◽  
pp. 618 ◽  
Author(s):  
Wanting Ling ◽  
Qing Shen ◽  
Yanzheng Gao ◽  
Xiaohong Gu ◽  
Zhipeng Yang
Keyword(s):  
Heavy Metals ◽  
Sorption Capacity ◽  
Contaminated Soils ◽  
Montmorillonite Clay ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Wide Ph Range ◽  
Ph Dependent ◽  
Ph Range ◽  
Soil Ageing

A decrease in release and availability of heavy metals in soil has been of worldwide interest in recent years. Bentonite is a type of expandable montmorillonite clay, and has strong sorption for heavy metals. In this work, the control of amended bentonite on the release of copper (Cu2+) from spiked soils was investigated using a batch equilibrium technique. Sorption of Cu by bentonite was pH-dependent, and could be well described using the Langmiur model. Maximum sorption capacity of the bentonite used in this study was 5.4 mg/g, which was much greater than soils reported in the literature. The extent of Cu2+ release from spiked soils was correlated with slurry concentrations, pH, and soil ageing process. In all cases, the amendment of bentonite was observed to effectively decrease the release of Cu2+ from soils. The apparent aqueous concentrations of Cu2+ released from soils devoid of bentonite treatment were 113–1160% higher than those from the soils amended with bentonite. Moreover, the magnitude of Cu2+ release decreased with increasing amount of bentonite added to soils. The bentonite added was more effective in retaining Cu2+ in sorbents for aged contaminated soils. Such enhanced retention resulting from the presence of bentonite was observed within a wide pH range from 2.5 to 7.0. Bentonite, as one of the most abundant minerals in soils, is regarded to improve the soil overall quality. The results obtained from this work provide useful information on utilisation of bentonite to control the release of heavy metals from contaminated soils.

scholarly journals Cryptogamic Packed Biofilter as Potential Adsorbent for CO2, NH3, and H2S Impurities from Biogas

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Norbert W. Temba ◽  
Thomas Kivevele ◽  
Tatiana Pogrebnaya
Keyword(s):  
Sorption Capacity ◽  
Removal Efficiency ◽  
Breakthrough Time ◽  
Trace Impurities ◽  
Flow Rates ◽  
Adsorption Dynamics ◽  
Metallic Oxides ◽  
S 100 ◽  
Extractable Cations

The presence of elevated concentrations of carbon dioxide, hydrogen sulfide, ammonia, and trace impurities in biogas affect its caloric value as well as causes corrosion and is extremely toxic. There are various methods in existence for removal of these impurities, but most are chemically based and expensive and are limited in use. In our work, cryptogams (moss) integrated with soil and biochar packed in a filter have been employed for simultaneous removal of CO2, H2S, and NH3, from biogas. Different soil types rich in metallic oxides at different masses of 100 g, 150 g, and 200 g with a fixed mass of moss and biochar were tested in an on-site experiment to determine the removal efficiency (RE) and sorption capacity (SC). The adsorption dynamics of the filters were investigated at two flow rates, 80 ml/min and 100 ml/min, by determining removal efficiency. For the contribution of each substrate, sorption capacity and breakthrough time were determined by considering 5 g of each substrate that made up the filter. The soils with a high content of extractable cations showed excellent adsorption capacity for H2S by about 20 g S/100 g, which was higher than other adsorbents tested. It was found that integrated biofilter made up of bed arrangement of the soil, biochar, and moss plant improved the quality of biogas with SC of 11 g S and RE of 93% for H2S, 72% for NH3, and 68% for CO2.

Prussian blue non-woven filter for cesium removal from drinking water

2015 ◽  
Vol 153 ◽  
pp. 37-42 ◽  
Author(s):  
Guan-Ru Chen ◽  
Yin-Ru Chang ◽  
Xiang Liu ◽  
Tohru Kawamoto ◽  
Hisashi Tanaka ◽  
...  
Keyword(s):  
Drinking Water ◽  
Prussian Blue ◽  
Cesium Removal

Effect of cesium ion on the synthesis and catalytic properties with FeCo Prussian blue analogue

2018 ◽  
Vol 710 ◽  
pp. 180-187 ◽  
Author(s):  
Shuyue Guo ◽  
Yanling Liang ◽  
Simon Tricard ◽  
Ning Wang ◽  
Lei Feng ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Catalytic Properties ◽  
Prussian Blue Analogue ◽  
Cesium Ion

H2O2-sensing abilities of mixed-metal (Fe-Ni) Prussian blue analogs in a wide pH range

2020 ◽  
Vol 502 ◽  
pp. 119314 ◽  
Author(s):  
Manabu Ishizaki ◽  
Eito Ohshida ◽  
Hiroya Tanno ◽  
Tohru Kawamoto ◽  
Hisashi Tanaka ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Mixed Metal ◽  
Wide Ph Range ◽  
Prussian Blue Analogs ◽  
Ph Range ◽  
H2o2 Sensing

Radioactive cesium ion removal from wastewater using polymer metal oxide composites

2021 ◽  
Vol 403 ◽  
pp. 123652
Author(s):  
Birol Işık ◽  
Ayşe E. Kurtoğlu ◽  
Gülten Gürdağ ◽  
Gönül Keçeli
Keyword(s):  
Metal Oxide ◽  
Radioactive Cesium ◽  
Ion Removal ◽  
Cesium Ion ◽  
Polymer Metal ◽  
Oxide Composites

Zeolite and short-cut fiber-based wet-laid filter media for particles and heavy metal ion removal of wastewater

2019 ◽  
pp. 152808371986693
Author(s):  
Kyung Chul Sun ◽  
Jung Woo Noh ◽  
Yeong Og Choi ◽  
Sung Hoon Jeong ◽  
Yeon Sang Kim
Keyword(s):  
Removal Efficiency ◽  
Metal Ion ◽  
High Efficiency ◽  
Solid Particles ◽  
Filter Media ◽  
Main Layer ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Efficiency Rate

As development of industrialization grows constantly, the purification of hazardous solid particles and ions is one of the most important topics in environment and ecosystem. In this report, we designed and developed a novel and advanced type of filter media for the removal of both solid particles and hazardous ions, we choose Cs+ and Ca2+ here, by enclosing zeolite in wet-laid nonwoven media. The performance of the prepared filter media was evaluated by continuous sorption experiments, which were followed by solid particles and ion-removal efficiency studies. The prepared filter media showed excellent uniformity. The prepared filter media exhibited a solid removal efficiency rate which ranged from 80 to 82%, and the initial removal efficiency of ions exceeded 99%. These values are in effect as the main layer in the completed liquid filter media and for the next step to prepare the completed multi-layered liquid filter units. The results here suggest that this novel filter media can be used in high-efficiency and multi-functional liquid filter units for residential and industrial engineering.

scholarly journals Effective Removal of Fluoride onto Metal Ions Loaded Orange Waste

2012 ◽  
Vol 27 ◽  
pp. 61-66 ◽  
Author(s):  
Kedar Nath Ghimire
Keyword(s):  
Metal Ions ◽  
Removal Efficiency ◽  
Orange Juice ◽  
Experimental Results ◽  
Fluoride Removal ◽  
Acidic Ph ◽  
Neutral Ph ◽  
Effective Removal ◽  
Orange Waste ◽  
Ph Range

Removal of fluoride is investigated onto several metal ions loaded phosphorylated orange juice residue and commercially available alumina. The experimental results revealed that cerium (IV) loaded phosphorylated orange waste indicated excellent fluoride removal efficiency at acidic pH range and while that lanthanum loaded at neutral pH range. Both the metal loaded adsorbents are found superior to the commercially available activated alumina.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6660 J. Nepal Chem. Soc., Vol. 27, 2011 61-66 

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