Metal ion adsorption using coconut shell powder activated by chemical and physical treatments

2021 ◽  
Author(s):  
Paula Fabiane Pinheiro do Nascimento ◽  
Eduardo Lins de Barros Neto ◽  
Joao Fernandes de Sousa ◽  
Vitor Trocolli Ribeiro ◽  
Lindemberg de Jesus Nogueira Duarte ◽  
...  
Keyword(s):  
Metal Ion ◽  
Coconut Shell ◽  
Ion Adsorption ◽  
Metal Ion Adsorption ◽  
Physical Treatments ◽  
Coconut Shell Powder ◽  
Shell Powder

scholarly journals Preparation, characterization and application of CS@PDA@Fe3O4 nanocomposite as a new magnetic nano-adsorber for the removal of metals and dyes in wastewater

RSC Advances ◽  
2021 ◽  
Vol 11 (38) ◽  
pp. 23679-23685
Author(s):  
Xingjing Zhang ◽  
Baohe Li ◽  
Xiaoqian Han ◽  
Nong Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Adsorption ◽  
Metal Ion Adsorption

Synthesis of CS@PDA@Fe3O4 nanocomposite and heavy metal ion adsorption.

Impact of the degree of functionalization of graphene oxide on the electrochemical charge storage property and metal ion adsorption

RSC Advances ◽  
2014 ◽  
Vol 4 (107) ◽  
pp. 62737-62745 ◽  
Author(s):  
Mahesh M. Kadam ◽  
Omkar R. Lokare ◽  
Kota V. M. K. Kireeti ◽  
Vilas G. Gaikar ◽  
Neetu Jha
Keyword(s):  
Graphene Oxide ◽  
Metal Ion ◽  
Charge Storage ◽  
Ion Adsorption ◽  
Oxidizing Agent ◽  
Metal Ion Adsorption ◽  
Storage Property

The increase in oxygen functionalities on GO with increasing use of oxidizing agent results in (i) amplification of redox pseudocapacitive current and (ii) improves metal ion adsorption.

scholarly journals Cadmium Ion Biosorption by the Thermophilic Bacteria Geobacillus stearothermophilus and G. thermocatenulatus

2006 ◽  
Vol 72 (6) ◽  
pp. 4020-4027 ◽  
Author(s):  
Adrian Hetzer ◽  
Christopher J. Daughney ◽  
Hugh W. Morgan
Keyword(s):  
Metal Ion ◽  
Functional Group ◽  
Thermophilic Bacteria ◽  
Toxicity Tests ◽  
Ion Adsorption ◽  
Geobacillus Stearothermophilus ◽  
Cadmium Ion ◽  
Thermophilic Microorganisms ◽  
Gram Positive Bacteria ◽  
Metal Ion Adsorption

ABSTRACT This study reports surface complexation models (SCMs) for quantifying metal ion adsorption by thermophilic microorganisms. In initial cadmium ion toxicity tests, members of the genus Geobacillus displayed the highest tolerance to CdCl2 (as high as 400 to 3,200 μM). The thermophilic, gram-positive bacteria Geobacillus stearothermophilus and G. thermocatenulatus were selected for further electrophoretic mobility, potentiometric titration, and Cd2+ adsorption experiments to characterize Cd2+ complexation by functional groups within and on the cell wall. Distinct one-site SCMs described the extent of cadmium ion adsorption by both studied Geobacillus sp. strains over a range of pH values and metal/bacteria concentration ratios. The results indicate that a functional group with a deprotonation constant pK value of approximately 3.8 accounts for 66% and 80% of all titratable sites for G. thermocatenulatus and G. stearothermophilus, respectively, and is dominant in Cd2+ adsorption reactions. The results suggest a different type of functional group may be involved in cadmium biosorption for both thermophilic strains investigated here, compared to previous reports for mesophilic bacteria.

scholarly journals PENGARUH SUHU DAN KECEPATAN PENGADUKAN PADA PROSES PEMBUATAN SURFAKTAN NATRIUM LIGNOSULFONAT DARI TEMPURUNG KELAPA

2013 ◽  
Vol 2 (1) ◽  
pp. 21-25
Author(s):  
Jhon Peri Rinaldo Sirait ◽  
Nico Sihombing ◽  
Zuhrina Masyithah
Keyword(s):  
Base Material ◽  
Sodium Bisulfite ◽  
Coconut Shell ◽  
Effect Of Temperature ◽  
Agitation Rate ◽  
Reactant Ratio ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Coconut Shell Powder ◽  
Shell Powder

Coconut shell is one of agricultural wastes that having low commercial value. This research is objected to use coconut shell as the base material of producing surfactant. The use of coconut shell is basically due to its content of lignin, about 29,4%. The objective of this research is to obtain isolate lignin with increasing chatalis NaOH and H2SO4 with lignin identification, the effect of temperature and agitation rate of producing surfactant. The research was done in a reactor with temperature of 100 0C, 110 0C, 120 0C, 3 hours reaction time, pH 6, 80 rpm, 90 rpm, 100 rpm agitation rate, and coconut shell as the base material. Dry coconut shell is grinded and the powder is collected to be reacted. The coconut shell powder is reacted with sodium bisulfite solution with variation in ratio of 1:0,5.  The product is filtered to get filtrate and residue. The filtrate is further analyzed by using the FT-IR spectrophotometry method. From the research we get maximum purity of surfactant at sodium bisulfite with reactant ratio of 1:0,5;  Speed 100 rpm and temperature 120 0C.

scholarly journals Effect of Coconut Shell Powder as Filler on the Mechanical Properties of Coir-polyester Composites

2017 ◽  
Vol 5 (4) ◽  
pp. 75-82 ◽  
Author(s):  
Md. Tangimul Islam ◽  
Subrata Chandra Das ◽  
Joykrisna Saha ◽  
Debasree Paul ◽  
M. Tauhidul Islam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Coconut Shell ◽  
Polyester Composites ◽  
Coconut Shell Powder ◽  
Shell Powder
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