Biosorption of Cr(VI) by Halomonas sp. DK4, a halotolerant bacterium isolated from chrome electroplating sludge

2019 ◽  
Vol 27 (22) ◽  
pp. 27330-27344 ◽  
Author(s):  
Vidhi Kalola ◽  
Chirayu Desai
Keyword(s):  
Halotolerant Bacterium ◽  
Electroplating Sludge ◽  
Chrome Electroplating

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.

Develop spinel structure and quantify phase transformation for nickel stabilization in electroplating sludge

2021 ◽  
Vol 131 ◽  
pp. 286-293
Author(s):  
Yunxue Xia ◽  
Fanling Meng ◽  
Zhong Lv ◽  
Jianshuai Zhang ◽  
Yuanyuan Tang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Spinel Structure ◽  
Electroplating Sludge

Synthesis of a perovskite-type catalyst from Cr electroplating sludge for effective catalytic oxidization of VOC

2021 ◽  
Vol 294 ◽  
pp. 113025
Author(s):  
He Bai ◽  
Zongfang Wang ◽  
Jia Zhang ◽  
Jianzhong Wu ◽  
Yang Yue ◽  
...  
Keyword(s):  
Electroplating Sludge ◽  
Perovskite Type ◽  
Catalytic Oxidization

Towards broad-operation window for stable CO2 electroreduction to HCOOH by upcycling design of electroplating sludge derived Sn@N/P-doped carbon

2022 ◽  
Author(s):  
Xiaohui Zhong ◽  
Zuqi Zhong ◽  
Shujie Liang ◽  
Gongchang Zeng ◽  
Shuang Cheng ◽  
...  
Keyword(s):  
Reduction Reaction ◽  
Promising Strategy ◽  
Co2 Electroreduction ◽  
Electroplating Sludge ◽  
Carbon Neutral

Electrochemical CO2 reduction reaction (CO2RR) to HCOOH offers a promising strategy for the carbon-neutral cycle. Sn-based materials have been demonstrated for extensive studies of CO2RR to HCOOH, but great challenges...

scholarly journals Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Yu Zhang ◽  
Peixin Shi ◽  
Lijuan Chen ◽  
Qiang Tang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Water Content ◽  
Environmental Risk ◽  
Coal Fly Ash ◽  
Surrounding Environment ◽  
Electroplating Sludge ◽  
Backfill Materials ◽  
Standard Limit ◽  
The Impact

The electroplating sludge may pose serious threat to human health and surrounding environment without safe treatment. This paper investigated the feasibility of using electroplating sludge as subgrade backfill materials, by evaluating the mechanical properties and environmental risk of the cement-coal fly ash solidified sludge. In this study, Portland cement and coal fly ash are used to solidify/stabilize the sludge. After curing for 7, 14, and 28 days, the stabilization/solidification sludge specimens were subject to a series of mechanical, leaching, and microcosmic tests. It was found that the compressive strength increased with the increase of cement content, curing time, and the cement replacement by coal fly ash besides water content. Among these factors, the impact of water content on the compressive strength is most noticeable. It was observed that the compressive strength declined by 87.1% when the water content increased from 0% to 10%. Besides, leaching tests showed that the amount of leaching heavy metals were under the standard limit. These results demonstrated utilization of electroplating sludge in subgrade backfill material may provide an alternative for the treatment of electroplating sludge.

scholarly journals Roseovarius nitratireducens sp. nov., a halotolerant bacterium isolated from a saline lake

2018 ◽  
Vol 68 (4) ◽  
pp. 1204-1209 ◽  
Author(s):  
Xia Shen ◽  
Zhe Zhao ◽  
Chen Wu ◽  
Xiao-Yun Yu ◽  
Yu Li ◽  
...  
Keyword(s):  
Saline Lake ◽  
Halotolerant Bacterium

scholarly journals THE EFFECT OF ELECTRIC FLOW ON DECORATIVE KROM ELECTROPLATING WITH COPPER BASE METAL TOWARD CORROSION RATE

2013 ◽  
Vol 1 (2) ◽  
pp. 134
Author(s):  
Ahmadi Ahmadi ◽  
Citra Ayu Dewi
Keyword(s):  
Corrosion Rate ◽  
Electric Current ◽  
Base Metal ◽  
Copper Metal ◽  
Chemical Laboratory ◽  
Copper Base ◽  
Metal Metal ◽  
One Year ◽  
Electroplating Process ◽  
Chrome Electroplating

In this study a decorative chrome electroplating process has been carried out with a copper base metal, metal electroplating is often used as a means to provide a thin layer on the surface of other metals or substrates using metal which has advantages in terms of property and corrosion resistance. In decorative chrome electroplating nickel and chrome are used as coatings, nickel and chrome are used as coatings because of their protective and decorative properties, protective means they can prevent corrosion and decorative because they look shiny so they look attractive. Copper metal is chosen because of its huge application in the community. This study aims to measure the corrosion rate in copper metal after a decorative chrome electroplating process based on electric current used during the electroplating process. This research is important because during the electroplating process a decorative chrome electoplating technique will be obtained in the form of modules, and the module will be used to train students to increase their skills. This research was conducted in the IKIP Mataram chemical laboratory with a time of one year. The process carried out in this study sequentially is to prepare an electrolyte solution used for electroplating, preparing the copper base metal to be free of oxide or rust, nickel coating and finally coating with chrome. From the coating process carried out then the results will be analyzed the corrosion rate by immersion in NaCl solution at a concentration of 36.05 grams / L for 336 hours, based on variations in electric current used during the electroplating process of 0.5; 1; 1.5; 2; and 2.5 Ampere, the corrosion rate results were 0.029; 0.013; 0.017; 0.022; and 0.012 mm / yr; while the copper metal which is not coated with a corrosion rate is 0.308 mm / yr. Thus it can be concluded that copper metal coated with nickel chrome will effectively resist the lowest rate of corrosion in the current given 2.5 Ampere.

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