The use of waste, fine-grained carbonaceous material in the process of copper slag reduction

Łabaj, J.; Blacha, L.; Jodkowski, M.; Smalcerz, A.; Fröhlichová, Mária; Findorák, Róbert

doi:10.1016/j.jclepro.2020.125640

Cited by 28 publications

(11 citation statements)

References 32 publications

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“…The Se content in roots, stems, and leaves of bok choy treated by CSBC was the lowest and the root growth was the longest when compared with other restorative agents. This indicates that CSBC could reduce the bioavailability of Se ( Łabaj et al, 2021 ). Based on these pot experiments, the CSBC exhibited potential soil remediation capability and inhibited bioaccumulation on bok choy to suppress heavy metal transfer between the biosphere and soil.…”

Section: Resultsmentioning

confidence: 87%

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

Luo¹,

Chen²,

Cui³

et al. 2022

Front. Bioeng. Biotechnol.

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Cost-effectively improving the performance of biochar is essential for its large-scale practical application. In this work, the agro-industrial by-products copper slag and tobacco straw were employed for the preparation of modified biochar (CSBC). The obtained CSBC exhibited satisfactory capacity on Se(IV) immobilization of 190.53 mg/g, with surface interactions determined by the monolayer and mainly chemisorption. The removal mechanisms included chemical reduction, electrostatic attraction, co-precipitation, and formation of complexations. Interestingly, the existence of Cu2Se structure after adsorption indicated the involvement of Cu species within Se(IV) elimination. Moreover, the industrial agricultural practicality of CSBC was evaluated by regeneration tests, economic assessment, and pot experiments. The results demonstrate that iron species-modified biochar prepared from two agro-industrial by-products is a promising and feasible candidate for selenite removal from wastewater.

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Section: Resultsmentioning

confidence: 87%

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

Luo¹,

Chen²,

Cui³

et al. 2022

Front. Bioeng. Biotechnol.

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“…The morphology of the samples was imaged using the secondary electron detector (Secondary Electron—SE) and Environmental Secondary Electron Detector (ESED). The phase composition analysis was conducted by using the X-ray phase analysis method with an X-ray diffractometer (XRD) [ 43 ].…”

Section: Methodsmentioning

confidence: 99%

“…The first group includes coal, coke, coke breeze, anthracite and graphite [ 38 , 39 , 40 , 41 ]. Research has also been carried out on the use of fine-grained coal-bearing waste materials as the reducing agents in the analyzed process, resulting from coal enrichment and processing [ 42 , 43 , 44 ]. The gaseous reducing agents used in the processes of copper recovery from slags are usually hydrogen, methane, carbon monoxide or natural gas [ 45 , 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

et al. 2023

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The article presents the results of a study on metallurgical sludge reduction using electronic waste such as Printed Circuit Boards (PCBs). Two aspects were taken into account when selecting such a reducer, namely the environmental aspect and the technological aspect. The research was an attempt to use waste metal-bearing material of which the effective management causes many problems from an environmental point of view. In the technological aspect, the specific chemical composition of this waste was taken into account. Its gasification yields significant amounts of hydrocarbons, which are excellent reducing agents in such process. The separation of these compounds may additionally cause the mixing of the molten slag, which should result in faster separation of the formed metal droplets and the molten slag. In the case of the fragmented PCB (Printed Circuit Board) reducer used in this study, a significant degree of copper removal was achieved, as much as 92%. As the reduction-process time increased, the degree of copper removal also increased. For the 1 h process, the average value of copper removal was 60%, and for the 4.5 h process it was over 70%. The case was the same with the addition of reductant: as the amount of reductant added to the process increased, an increase in copper removal was observed. With the addition of 30 g of the reducing agent (per 65 g of slag), the degree of copper removal was over 90%.

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“…Lots of attempts have been made by researchers and copper producing enterprises all over the world to develop efficient methods for the utilization of copper smelting slag. Generally, there are five main directions for the utilization of copper smelting slag, such as pyrometallurgical methods, [5][6][7][8][9] flotation, 10,11) hydrometallurgical leaching, 3,[12][13][14][15] combination of pyro-hydrometallurgical methods 3,16) and direct utilization. 17) The pyrometallurgical treatment of copper smelting slag is mainly performed through direct reduction of oxide components, such as Cu 2 O and PbO, by coal, coke, gaseous reducing agents, waste oil or biomass in an electric furnace for copper recovery.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Carbothermic Reduction of Copper Smelting Slag and Valuable Constituents Recovery

et al. 2022

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The use of waste, fine-grained carbonaceous material in the process of copper slag reduction

Cited by 28 publications

References 32 publications

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

Selenite elimination via zero-valent iron modified biochar synthesized from tobacco straw and copper slag: Mechanisms and agro-industrial practicality

The Use of PCB Scrap in the Reduction in Metallurgical Copper Slags

Improvement of Carbothermic Reduction of Copper Smelting Slag and Valuable Constituents Recovery

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