The sorption and short-term immobilization of lead and cadmium by nano-hydroxyapatite/biochar in aqueous solution and soil

Chemosphere ◽  
2021 ◽  
pp. 131810
Author(s):  
Cailing Zhou ◽  
Xin Song ◽  
Yiwei Wang ◽  
Hui Wang ◽  
Shifu Ge
Keyword(s):  
Aqueous Solution ◽  
Short Term ◽  
Lead And Cadmium

scholarly journals Accelerated Short-Term Techniques to Evaluate Corrosion in TiC Reinforced AA6063 Composites

2017 ◽  
Vol 13 (10) ◽  
pp. 5905-5913
Author(s):  
S. Saravanan ◽  
P.Senthil Kumar ◽  
T. Palanisamy ◽  
M. Ravichandran ◽  
V. Anandakrishnan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Room Temperature ◽  
Stir Casting ◽  
Short Term ◽  
Accelerated Corrosion ◽  
Weight Percentage ◽  
The Poor ◽  
Accelerated Corrosion Tests

AA6063-TiC composites have several weight percentages up to 9 wt. % were fabricated by using stir casting route method. The effects of the weight percentage of TiC particles on the microstructures and corrosion behavior of AA6063-TiC composites were studied. The results revealed that the AA6063-TiC composites exhibited higher density than the AA6063 matrix. The accelerated corrosion tests of AA6063-TiC composites in 3.5 wt. % NaCl aqueous solution at room temperature, the AA6063-TiC composites have better corrosion resistance than the AA6063 matrix. Increasing the weight percentage of the TiC particles to reduces the corrosion rate of the AA6063-TiC composites. In this process corrosion rate of 0.4402 mm/year for AA6063 matrix, 0.3891 mm/year for 3 wt. % , 0.3568 mm/year for 6 wt. % and 0.3062 mm/year for 9 wt. % of TiC particles respectively. The poor corrosion resistance of the composites can be attributed to the galvanic effects between the AA6063 matrix and TiC reinforcement.

scholarly journals Removal of Lead and Cadmium Ions from Aqueous Solution by Adsorption on a Low-Cost Phragmites Biomass

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 406 ◽  
Author(s):  
Abdulaziz N. Amro ◽  
Mohammad K. Abhary ◽  
Muhammad Mansoor Shaikh ◽  
Samah Ali
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Surface Area ◽  
Metal Ion ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Study Data ◽  
Small Surface ◽  
Cadmium Ions ◽  
Lead And Cadmium

In recent years, the interest in waste water treatment increased to preserve the environment. The objective of this study is the removal of lead and cadmium ions from aqueous solution by treated Phragmites biomass (TPB). TPB was characterized by using Fourier transform infrared spectroscopy (FTIR) and energy dispersive X-ray analysis (EDS) which indicates the presence of functional groups that may be responsible of metal adsorption such as hydroxyl, carbonyl, sulfonate and carboxylate. Characterization by scanning electron microscopy (SEM) and surface area analysis using the Brunauer–Emmett–Teller method (BET) illustrated that TPB is nonporous with a small surface area. The influences of various experimental factors were investigated; the proposed method recommended the extraction of Pb+2 and Cd+2 metal ions by TPB at pH 5.0. A contact time of 60 and 45 min was required for the adsorption 50 mL (50 ppm) Pb+2 and Cd+2 respectively to reach equilibrium when 0.10 g TPB was used. The optimum TPB dosage was 0.20 g for adsorption both metal ions when adsorbate solution was 50 mL (50 ppm). Particle sizes of 0.125–0.212 mm showed the best metal ion removal of both metal ions. Thermodynamic study illustrated that both metal ions correlate more with Langmuir isotherm. Furthermore, chemisorption of Pb+2 and Cd+2 on TPB was more likely according to kinetic study data.

Adsorption of lead and cadmium from aqueous solution by Gunungkidul zeolitic tuff, Indonesia

2020 ◽  
Vol 79 (8) ◽  
Author(s):  
Wawan Budianta ◽  
Norma Dian Andriyani ◽  
Adinda Ardiana ◽  
I. Wayan Warmada
Keyword(s):  
Aqueous Solution ◽  
Zeolitic Tuff ◽  
Lead And Cadmium

Immobilization of lead and cadmium from aqueous solution and contaminated sediment using nano-hydroxyapatite

2010 ◽  
Vol 158 (2) ◽  
pp. 514-519 ◽  
Author(s):  
Zizhong Zhang ◽  
Mengyan Li ◽  
Wei Chen ◽  
Shuzhen Zhu ◽  
Nannan Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Contaminated Sediment ◽  
Lead And Cadmium

A Cleaner Process for Short-Term Preservation of Hides using Wheat Bran

2022 ◽  
Vol 117 (1) ◽  
Author(s):  
Josep M. Morera ◽  
Esther Bartolí ◽  
Rafael Fernández ◽  
Luisa F. Cabeza
Keyword(s):  
Aqueous Solution ◽  
Wheat Bran ◽  
Common Method ◽  
Minimum Amount ◽  
Short Term ◽  
Tanning Process ◽  
Methods Of Application

Salting is the most common method to preserve hides and skins. However, this preservation system requires the generation of large amounts of contaminated salt, approximately three million tons per year. In recent years several researchers have suggested different methods for the short-term preservation of hides using plant-based formulations, which either minimize or even completely eliminate the use of salt in the process. In this work, the possibility of using wheat bran for this purpose was studied. Two methods of application (dry and aqueous solution) have been developed. They enable the preservation of hides for one month, reducing by half the salt used in the preservation stage without undermining the quality of the final leather. These two methods contribute to the improvement of the overall sustainability of the tanning process. With dry application, the use of salt is avoided and preservation occurs because the hide is dried. The application in aqueous solution (10% wheat bran) requires its previous hydrolysis and a minimum amount of salt (10ºBé). The preservation occurs because the acidity of the hide is increased.

Removal of lead and cadmium ions from aqueous solution by adsorption onto micro-particles of dry plants

2008 ◽  
Vol 61 (1) ◽  
pp. 10-16 ◽  
Author(s):  
H. Benhima ◽  
M. Chiban ◽  
F. Sinan ◽  
P. Seta ◽  
M. Persin
Keyword(s):  
Aqueous Solution ◽  
Cadmium Ions ◽  
Lead And Cadmium ◽  
Micro Particles
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