Cadmium (Cd) Ore Minerals, Uses » Geology Science
Modified date: 29/07/2023. Cadmium is a chemical element with the symbol "Cd" and atomic number 48. It is a soft, bluish-white metal that belongs to the transition metals group in the periodic table. Discovered in 1817 by German chemist Friedrich Stromeyer, cadmium has since found various industrial applications despite its known toxicity.
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Polyaspartic acid assisted-phytoremediation of cadmium …
1. Introduction. Various human activities including mining, smelting, waste disposal, fossil fuel combustion, agrochemical use and irrigation, lead to excessive accumulation of heavy metals in the soil, causing soil pollution (Liu et al., 2018a; Zhang et al., 2021a).Cadmium (Cd) pollution is the most serious among all soil pollution types, …
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Efficient bioimmobilization of cadmium contamination in …
Phosphate mining wastelands are replete with PR, which provides a natural passivator for the bioimmobilization of Cd contamination from these areas. However, PR mainly contains insoluble phosphate, which is not ideal for the direct remediation of Cd-contaminated soil. ... Cadmium-contaminated soil was sterilized at 121 °C. The sterilized …
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Statistical modeling and optimization of the cadmium biosorption
In this study, the process of cadmium biosorption on NaOH pretreated Aspergillus niger biomass was investigated in the batch mode. The effect of three independent variables, initial pH of solution (1.3–8.7), biomass dosage (0.1–7.5 g/l) and initial cadmium ion concentration (0.5–37.5 mg/l) on the biosorption process was …
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Optimization of flocculation conditions for soluble cadmium …
The actual design run by the statistics software, Design-Expert 8.0.6, is presented in Table S1. The experimental sequence and the summarized results are presented in Table 1.The significant factors in the flocculating process were determined to be X 2 (P = 0.0025), X 3 (P = 0.0065), and X 1 (P = 0.0173), respectively (Table S2). …
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Arsenic and Cadmium in Soils from a Typical Mining City in …
In order to determine the ecological risk and health risk of Arsenic (As) and Cadmium (Cd) in soils from a typical mining city in Huainan, a total of 99 soil samples were collected and analyzed. The results showed that the concentrations of As and Cd ranged from 3.2 to 39.50 and 0.01 to 0.19 mg/kg, respectively, which exceeded the soil …
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Statistical optimization for cadmium removal using
The highest percentage of cadmium removal was obtained in the run 5 with a value of 99.96%, where cadmium concentration is 200 mg/L, biomass is 4 g/L and pH is 5, while the minimum cadmium removal ...
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Removal of arsenic and cadmium with sequential soil
The studied soil was collected from the surface layer (0–20 cm) of a village close to a mining area southwest of Jiangxi, China. The collected soil was air-dried and ground before sieving to remove >2 mm gravels and <0.075 mm fine particles (particle-size cut points based on the previous studies), and then homogenized and stored until …
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Preparation and optimization of diatom-based cadmium ion-imprinted
1. Introduction. Cadmium accumulation and persistence in nature leads to heavy metal pollution. On one hand, biodegradation of Cd 2+ is difficult, as only the chemical valence and compound species is changed under the action of microorganisms [1], which may even transform it into a more toxic compound [2].On the other hand, Cd …
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Cadmium Poisoning: Causes, Effects, and Treatment
Symptoms of cadmium poisoning differ depending on whether you inhaled or ingested the metal. If you ingest contaminated food or water that contains cadmium, you may experience: Nausea and vomiting. Diarrhea. Abdominal pain and cramping. Tenesmus: A sensation that you need to have a bowel movement, but you don't actually need to …
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Migration and transformation of cadmium in rice
Mining has a tremendous impact on the geochemical environment of the mine and its surrounding ecosystems 1.During the mining of polymetallic sulfide mines, metal sulfides release a large number of ...
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Optimization and kinetic modeling of cadmium desorption …
1. Introduction. Heavy metal ions such as cobalt, copper, nickel, chromium, cadmium, and zinc are present in the waste streams from mining operations, tanneries, textile mills, electronics, electroplating and petrochemical industries [1].Heavy metals have a harmful effect on human physiology and other biological systems when they exceed the …
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A heuristic method for production scheduling of an open pit mining …
1. Introduction. The extraction of mineral resources in an open pit mine provides valuable (ore) and waste materials for the subsequent stages of the supply chain [Citation 1–3].Figure 1 presents the framework of a typical open pit mining operation. A mixed integer programming (MIP) based mathematical model defines the movement of …
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Statistical optimization for cadmium removal using
The results indicated that 4 g of dry Ulva fasciata biomass was found to successfully remove 99.96% of cadmium from aqueous …
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Removal of cadmium from aqueous solution using
Results showed that the sonochemical modification process could reduce particle size, enhance effective cation exchange capacity from 0.10 to 1.58 meq/g, and …
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Mining Optimization: What does it mean? | Modular Mining …
The word, "optimization," is somewhat ambiguous; the Oxford English Dictionary defines it as: the action of making the best or most effective use of a situation or resource. For us, that has historically meant dynamic, automated truck assignments based on real-time situational information. Leveraging our industry-first and still best-of ...
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Cadmium contamination in soils and crops in four mining
Cadmium can leak into the water and accumulate in sediments through human activities, such as mining or soil fertilization [14, 15]. It can also enter the human diet in different ways, including ...
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Optimization of Cadmium (Cd(2+)) Removal from Aqueous …
The interaction effects of (pH BD) and (X pH) were found to have significant influence on Cd²⁺ removal efficiency. The highest Cd²⁺ removal percentage attained by 79.60% at X = 10 ppm, pH ...
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Optimization of atmospheric leaching parameters for …
This study is focused on the optimization of effective parameters on Cadmium and Zinc recovery by atmospheric acid leaching of low-grade waste by response surface methodology (RSM) and using...
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Process Optimization of High-Efficiency Leaching of …
Through three experiments, the average value of the cadmium leaching rate is 98.18%, and the deviation from the predicted value is 1.02, Higher is the …
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High performance self-assembled sulfidized …
High performance self-assembled sulfidized nanoscale zero-valent iron for the immobilization of cadmium in contaminated sediments: Optimization, microbial …
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Optimization of cadmium biosorption by Shewanella …
1. Introduction. Due to the adverse effects of heavy metals on plants, animals and humans, the remediation of soils contaminated heavy metal has received much attentions (Li et al., 2018).Cadmium (Cd 2+) is a transitional heavy metal that exists in the aquatic environment through geochemical processes and is increasingly exposed to the …
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Optimization of cadmium and lead biosorption onto marine …
Such heavy metals are often found in wastewater or effluents resulting from metal plating, mining processes, smelting, battery manufactures, and tanneries [23]. According to Surana et al. [51] the amount of heavy metals, cadmium (Cd) and lead (Pb) in particular, was found to be greater than the Effect Range Low (ERL) limit in estuarine ...
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Clean Practical Method for Cadmium Recycling from Toxic
Cadmium is considered as a highly toxic metal. It is widely used in metallurgy, 1 pigment, 2 electronics, 3 and ceramics industries. 4 This metal is also used in solar batteries, electroplating, metallurgical industries, and synthetic chemicals industries. 5,6,7 The recovery of cadmium metals is normally extracted from both primary and …
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Optimization of water quality monitoring programs by data mining
Association rule mining is an effective methodology to optimize water monitoring. •. Patterns in the data and automatic probes can estimate 56% of laboratory variables. •. The influence of environmental factors is significant in optimizing. •. Water quality and anthropogenic influence do not influence optimization. •.
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Bioaccessibility of arsenic, lead, and cadmium in contaminated mining …
In this regard, soil samples from 33 locations at 12 mining/smelting sites in China were collected and examined in terms of soil properties, chemical fraction distributions, and bioaccessibilities of cadmium (Cd), lead (Pb), and arsenic (As). ... Total cadmium and lead concentrations ranged from 0.3 to 1937.7 and 13.4–39666.7 mg/kg, …
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Design method for cadmium and arsenic contamination
From the above description, two types of cadmium and arsenic contamination may be caused during the underground coal mining: 1) If the height of the mining fissure growth is larger than the mining depth (Fig. 1), mining fissures can develop to the ground.When the fissure growth results to a cut-through of surface water and goaf, …
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Removal of cadmium from aqueous solution using
Results showed that the sonochemical modification process could reduce particle size, enhance effective cation exchange capacity from 0.10 to 1.58 meq/g, and enlarge the surface area of CL from 31.14 to 37.25 m 2 /g The cadmium removal efficiency of the modified CL was optimized using response surface methodology (RSM) with …
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(PDF) Adsorption Optimization for the Removal of Cadmium …
the cadmium concentration reached 0.05 mg/L with the removal efficiency of 99.5%, still meeting QCVN 40: 2011/BTNMT. After 1400 min, the outlet Cd concentration was 0.052 mg/L with a
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Worldwide Production, Trade and Consumption of …
Cadmium is produced as a by-product from mining, smelting, and refining sulphide ores of zinc, and to a lesser degree, lead and copper. Cadmium minerals do not occur in …
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