scholarly journals Removal and recovery of metal ions from acidic multi-metal mine water using waste digested activated sludge as biosorbent

2021 ◽  
pp. 105770
Author(s):  
Robert Barthen ◽  
Mira L.K. Sulonen ◽  
Sirpa Peräniemi ◽  
Rohan Jain ◽  
Aino-Maija Lakaniemi
Keyword(s):  
Activated Sludge ◽  
Metal Ions ◽  
Mine Water ◽  
Metal Mine ◽  
Removal And Recovery

Study of Flocculation Mechanisms by Observing Effects of a Complexing Agent on Activated Sludge Properties

1991 ◽  
Vol 24 (7) ◽  
pp. 21-28 ◽  
Author(s):  
L. Eriksson ◽  
B. Alm
Keyword(s):  
Activated Sludge ◽  
Metal Ions ◽  
Electrostatic Interactions ◽  
Wastewater Treatment Plants ◽  
Sedimentation Velocity ◽  
Complexing Agent ◽  
Extracellular Polymers ◽  
Filtration Resistance ◽  
Polyvalent Metal ◽  
Sludge Properties

Electrostatic interactions between bacterial surfaces, extracellular polymers (ECP) and polyvalent metal ions are important in activated sludge flocculation. An indirect study of these mechanisms was done by adding different concentrations of EDTA to activated sludge samples from 6 Swedish wastewater treatment plants. The effects on sludge properties were studied with sedimentation and filtration tests as well as analysis of released extracellular polymers. EDTA had a significant effect on sedimentation velocity in all investigated sludges. This shows that charged polymers are important for the properties of the floc surfaces and in building up the sludge macroflocs. The effect on filtration resistance where the bulk properties of the primary flocs are more important varied considerably for the different sludges. Thus, both electrostatic and other interactions are involved to a varying extent in building up the primary flocs in the sludges investigated. Variations in sedimentation velocity, residual turbidity, filtration resistance and release of ECP with variations in EDTA concentrations could be explained by effects of polyvalent metal ions on ECP binding and conformation.

scholarly journals Reducing the Content of Metal Ions from Mine Water by Using Converter Sludge

Water ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 38 ◽  
Author(s):  
Lucia Rozumová ◽  
Jana Prehradná
Keyword(s):  
Metal Ions ◽  
Mine Water ◽  
Converter Sludge

scholarly journals Research of nanostructural minerals – bentonites used in purification of mineral water from heavy metal ions (Cu2+, Pb2+, Cd2+, Zn 2+)

2020 ◽  
Vol 4 (78) ◽  
pp. 115-122
Author(s):  
A. SH. BUKUNOVA ◽  
◽  
G. ZH. TURSBEKOVA ◽  
L. B. IRISKINA ◽  
M. K. ZHAMANBAEVA ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Mine Water ◽  
Heavy Metal Ions ◽  
Structural Characteristics ◽  
Mining Industry ◽  
Bentonite Clay ◽  
Acid Activation ◽  
Exchange Cations ◽  
Aluminum Ions

This paper presents the results of studies on the use of bentonite from the Taganskoye field for purification of mine water from the mining industry from heavy metal ions (MI). It has been established that the use of the thermo-acid-activated form of bentonite clay allows the removal of MI Cu2+, Pb2+, Cd2+, Zn2+ions from mine water by 99.6, 94.7, 98.9, 99.5 %, respectively, which ensures that the maximum permissible concentration of fishery is achieved at selected optimal conditions that were identified on the basis of an active experiment. A comparative analysis of the presented results of mass spectrometry and scanning electron microscopy shows that they are valid and do not contradict the obtained experimental data on the composition of exchange cations and structural characteristics in ultrafine mineral phases of bentonite clay samples of natural and thermo-acid activated forms It has been established that during acid activation of bentonite clays, the structure of montmorillonite is retained upon extraction of up to 80 % of magnesium, iron, and aluminum ions and is destroyed only upon their almost complete extraction.

scholarly journals Measure and effect of metal ions on activated sludge solubilization with the combination of alkaline treatment and high speed mixer

2011 ◽  
Vol 47 (2) ◽  
pp. 59-66
Author(s):  
TAKANORI FUJIMOTO ◽  
KIYOTAKA OKUNO ◽  
TAKASHI MIZOGUCHI ◽  
KEITARO WATANABE ◽  
KEN SASAKI
Keyword(s):  
Activated Sludge ◽  
Metal Ions ◽  
High Speed ◽  
Alkaline Treatment

Removal and Recovery of Heavy Metal Ions by Two-dimensional MoS2 Nanosheets: Performance and Mechanisms

2018 ◽  
Vol 52 (17) ◽  
pp. 9741-9748 ◽  
Author(s):  
Zhongying Wang ◽  
Alison Sim ◽  
Jeffrey J. Urban ◽  
Baoxia Mi
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Two Dimensional ◽  
Mos2 Nanosheets ◽  
Removal And Recovery

scholarly journals Removal and Recovery of Phosphorus Using Struvite Crystallization from Activated Sludge Treated Wastewater

2013 ◽  
Vol 50 (3) ◽  
pp. 128-136
Author(s):  
Yuichiro WAKIYA ◽  
Toru TURUHASHI ◽  
Norihiro TAKAYANAGI ◽  
Daisuke URABE ◽  
Hirofumi KAWAHARA ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Treated Wastewater ◽  
Struvite Crystallization ◽  
Removal And Recovery

Biosorption of Precious Metal Ions by Magnetically Activated Sludge Cultured Bacteria

2012 ◽  
Vol 152-154 ◽  
pp. 46-51
Author(s):  
Fang Cai ◽  
Jin Sheng Sun ◽  
Ting Ting Zhao ◽  
Jing Li
Keyword(s):  
Activated Sludge ◽  
Metal Ions ◽  
Precious Metal ◽  
High Selectivity ◽  
Anaerobic Bacteria ◽  
Precious Metals ◽  
Aerobic Bacteria ◽  
Adsorption Effect ◽  
Precious Metal Ions ◽  
Cultured Bacteria

Although biosorption for reclaiming single precious metal was frequently reported, the actual subsistent adsorptive competition among different metal ions sometimes shows diverging reinforcement or prohibition for different species. This study tries to screen bacteria that are able to absorb certain precious metals with high selectivity under competitive conditions. The activated sludge was cultivated from enrichment by magnetotactic bacteria medium proposed by Blakemore. Then four microbes, microaerobic bacteria(A) acclimated micro-aerobic bacteria (B), anaerobic bacteria(C) and acclimated anaerobic bacteria(D) were obtained for the following adsorption experiments. The four microbes have high removal efficiency of Au3+ both in its unitary and Au3+-Cu2+binary system. The microaerobic bacteria (B) are good metal catchers and carriers for the uptake of gold in aquatic solution with coexistence of copper. In Pd2+-Cu2+system, there is a collaborative adsorption effect, especially on (B).

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