Topic
Sodium sulfide
About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.
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TL;DR: In this paper, the authors applied bioleaching using Aspergillus niger strains MM1 and SG1 and acidithiobacillus thiooxidans 80191 for removal of Co and Li from spent Li-ion batteries under type 1 and type 2 conditions.
Abstract: Spent Li-ion batteries (LIBs) are highly rich in cobalt and lithium that need to be recovered to reduce shortages of these valuable metals and decrease their potential environmental risks. This study applied bioleaching using Aspergillus niger strains MM1 and SG1 and Acidithiobacillus thiooxidans 80191 for removal of Co and Li from spent LIB under type 1 and type 2 conditions. Moreover, metal recovery was attempted from the fungal leaching solution by sodium sulfide, sodium hydroxide, and sodium oxalate for Co and then for Li using sodium carbonate. The findings of this work show that metal removal in fungal bioleaching under type 2 system was highly comparable or even better than bacterial or acid leaching. A significant quantity of Co (82%) and Li (100%) dissolution was observed in strain MM1; however, metal solubilization was poor in strain 80191 because only 22% Co and 66% Li solubilized. A high amount of Co precipitated potentially as cobalt sulfide (100%), cobalt hydroxide (100%), or cobalt oxalate ...
111 citations
TL;DR: This study investigated metals removal from lead-zinc mine tailings using bioleaching and followed by sulfide precipitation to provide useful information for recovering or removing metals from lead, zinc, and Zn mine tailing.
110 citations
TL;DR: In this article, a production process for Zn powder by alkaline treatment of an oxidized Zn ore, smithsonite (ZnCO 3 ), was studied, and it was found that over 85% of both Zn and Pb, and less than 10% of Al can be leached from the ore when the leaching operation is conducted at over 95°C using 5 M NaOH solution as leaching agent.
109 citations
TL;DR: A unique sodium sulfide (Na2S) cathode is developed, which will allow the use of sodium-free anodes for room-temperature sodium-sulfur (Na-S) batteries and a special cathode structure is developed by spreading the multi-walled carbon nanotube-wrapped Na2S particles onto MWCNT fabrics.
Abstract: A unique sodium sulfide (Na2S) cathode is developed, which will allow the use of sodium-free anodes for room-temperature sodium-sulfur (Na-S) batteries. To overcome the "inert" nature of the Na2S, a special cathode structure is developed by spreading the multi-walled carbon nanotube (MWCNT)-wrapped Na2S particles onto MWCNT fabrics. Spectroscopic and electrochemical analyses reveal a series of polysulfide intermediates involved in the charge/discharge of the cell. The Na-S battery prepared in full discharge state with the Na2S/MWCNT cathode provides a remarkable capacity of 500 A h kg(-1) (based on sulfur mass) after 50 cycles.
109 citations
TL;DR: In this article, the effect of scrubber temperature and pH, ionic mercury concentration in the liquor, total sulfite, and chloride and bromide ion concentration in solution on mercury re-emission was investigated.
106 citations