Selective recovery of Cr from electroplating nanosludge via crystal modification and dilute acid leaching

2020 ◽  
Vol 7 (5) ◽  
pp. 1593-1601 ◽  
Author(s):  
Jiayi Zheng ◽  
Jiaxin Lv ◽  
Weizhen Liu ◽  
Zongren Dai ◽  
Huizhong Liao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Acid Leaching ◽  
Selective Extraction ◽  
Crystal Modification ◽  
Nanosized Particles ◽  
Dilute Acid ◽  
Selective Recovery ◽  
Electroplating Sludge

Amorphous nanosized particles in electroplating sludge are modified for selective extraction of heavy metals.

Multiple heavy metals extraction and recovery from hazardous electroplating sludge waste via ultrasonically enhanced two-stage acid leaching

2010 ◽  
Vol 178 (1-3) ◽  
pp. 823-833 ◽  
Author(s):  
Chuncheng Li ◽  
Fengchun Xie ◽  
Yang Ma ◽  
Tingting Cai ◽  
Haiying Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Acid Leaching ◽  
Two Stage ◽  
Electroplating Sludge ◽  
Sludge Waste ◽  
Multiple Heavy Metals ◽  
Metals Extraction

Stability of Ceramic Glazes Obtained by Valorification of Anorganic Pigments Extracted from Electroplating Sludge

2018 ◽  
Vol 69 (3) ◽  
pp. 571-574
Author(s):  
Mihaela Andreea Mitiu ◽  
Maria Iuliana Marcus ◽  
Maria Vlad ◽  
Cristina Mihaela Balaceanu
Keyword(s):  
Heavy Metals ◽  
Leaching Tests ◽  
Ceramic Tiles ◽  
Research Activity ◽  
Limit Values ◽  
Leaching Potential ◽  
International Standard ◽  
Ceramic Samples ◽  
Electroplating Sludge ◽  
The Stability

This paper presents the results of the research activity in order to etablish the stability and leaching potential of ceramic tiles which have been developed using glazes colored with pigments obtained by the extraction of chromium and iron metals from electroplating sludge. All these ceramic tiles contain various amounts of heavy metals in their glazes due to the pigments composition. The ceramic samples have been subjected to leaching tests in order to detect if various elements of relevance such as chromium, lead, cadmium, zinc or iron migrated to any great extent into test solutions. Leaching tests have been performed following the international standard SR ISO 10545-15 method for specific metals leaching into 4% acetic acid solutions at 220C after a 24h period and the international standard SR EN 12457/1-4 method with distilled water as leaching agent at LSR of 10 l/kg, for 24h period. Amounts of heavy metals have been negligible or non-detectable (iron) in the leaching solutions, being well below the limit values established by the legislation in force.

The selective extraction of wool keratin with dilute acid

1967 ◽  
Vol 120 (2) ◽  
pp. 249-254 ◽  
Author(s):  
R. DeDeurwaerder ◽  
M.G. Dobb ◽  
L.A. Holt ◽  
S.J. Leach
Keyword(s):  
Selective Extraction ◽  
Dilute Acid ◽  
Wool Keratin

Separation of Cd(ii) and Ni(ii) in a binary mixture through competitive adsorption and acid leaching

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 92885-92892 ◽  
Author(s):  
Hong Guo ◽  
Shufen Zhang ◽  
Zinong Kou ◽  
Shangru Zhai ◽  
Wei Ma ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Binary Mixture ◽  
Aqueous Solutions ◽  
Environmental Protection ◽  
Competitive Adsorption ◽  
Acid Leaching

Different heavy metals present simultaneously in aqueous solutions should be separated to promote environmental protection.

Effect of Trivalent Metal Cations on the Properties of LDHs Supercapacitors Prepared from Electroplating Sludge

2021 ◽  
Vol 1035 ◽  
pp. 1089-1095
Author(s):  
Jin Yun Zhu ◽  
Tao Jun Li ◽  
Li Chen ◽  
Tian Bao Liu ◽  
Xiu Ling Yan
Keyword(s):  
Acid Leaching ◽  
Metal Cations ◽  
Raw Material ◽  
Trivalent Metal ◽  
Specific Mass ◽  
Inhibition Effect ◽  
Electroplating Sludge ◽  
Leaching Solution ◽  
Supercapacitor Performance ◽  
Double Hydroxides

Trivalent metal cations are the basic composition of Layered Double Hydroxides (LDHs), however, the effect of metal cations on the supercapacitor performance of LDHs prepared from electroplating sludge has not been reported. In the present study the acid leaching solution of electroplating sludge was used as raw material, and Cr, Fe, Al and other common metal cations were added into the precursors to investigate the effect of trivalent metal cations on the supercapacitor performance of LDHs prepared from electroplating sludge. The experimental results show that the three kinds of metal cations can inhibit the specific mass capacitance of LDHs, and the sequence of inhibition effect is Fe < Al < Cr. This experiment is expected to provide some references for the resource utilization of electroplating sludge.

Highly efficient recovery and clean-up of four heavy metals from MSWI fly ash by integrating leaching, selective extraction and adsorption

2019 ◽  
Vol 234 ◽  
pp. 139-149 ◽  
Author(s):  
Jinfeng Tang ◽  
Minhua Su ◽  
Qihang Wu ◽  
Lezhang Wei ◽  
Nana Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Selective Extraction ◽  
Mswi Fly Ash ◽  
Highly Efficient ◽  
Efficient Recovery

scholarly journals Inventory of MSWI Fly Ash in Switzerland: Heavy Metal Recovery Potential and Their Properties for Acid Leaching

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1668
Author(s):  
Wolfgang Zucha ◽  
Gisela Weibel ◽  
Mirjam Wolffers ◽  
Urs Eggenberger
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Acid Leaching ◽  
Acid Neutralizing Capacity ◽  
Mswi Fly Ash ◽  
Mineralogical Characterization ◽  
Recovery Rates ◽  
Leaching Potential ◽  
Geochemical Properties ◽  
Neutralizing Capacity

From the year 2021 on, heavy metals from Swiss municipal solid waste incineration (MSWI) fly ash (FA) must be recovered before landfilling. This is predominantly performed by acid leaching. As a basis for the development of defined recovery rates and for the implementation of the recovery process, the authorities and plant operators need information on the geochemical properties of FA. This study provides extended chemical and mineralogical characterization of all FA produced in 29 MSWI plants in Switzerland. Acid neutralizing capacity (ANC) and metallic aluminum (Al0) were additionally analyzed to estimate the effort for acid leaching. Results show that all FA samples are composed of similar constituents, but their content varies due to differences in waste input and incineration conditions. Based on their geochemical properties, the ashes could be divided into four types describing the leachability: very good (6 FA), good (10 FA), moderate (5 FA), and poor leaching potential (8 FA). Due to the large differences it is suggested that the required recovery rates are adjusted to the leaching potential. The quantity of heavy metals recoverable by acid leaching was estimated to be 2420 t/y Zn, 530 t/y Pb, 66 t/y Cu and 22 t/y Cd.

Enhancing Cu-Zn-Cr-Ni Co-Extraction from Electroplating Sludge in Acid Leaching Process by Optimizing Fe3+ Addition and Redox Potential

2019 ◽  
Vol 36 (9) ◽  
pp. 1244-1257 ◽  
Author(s):  
Ping Wu ◽  
Lijuan Zhang ◽  
Yongdi Liu ◽  
Xinxin Xie ◽  
Jun Zhou ◽  
...  
Keyword(s):  
Redox Potential ◽  
Acid Leaching ◽  
Leaching Process ◽  
Electroplating Sludge

Selective extraction of heavy metals from two real calcium-rich contaminated soils by a modified NTA

2016 ◽  
Vol 318 ◽  
pp. 48-53 ◽  
Author(s):  
François Picard ◽  
Jamal Chaouki
Keyword(s):  
Heavy Metals ◽  
Contaminated Soils ◽  
Selective Extraction

Selective recovery by precipitation of selenium and mercury from acid leaching solutions

1991 ◽  
pp. 89-95
Author(s):  
D. D’Hondt ◽  
N. Gérain ◽  
A. Van Lierde
Keyword(s):  
Acid Leaching ◽  
Selective Recovery
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