Selective Electrodialysis for Copper Removal from Brackish Water and Coal Seam Gas Water

Abstract

This study investigates the removal rate of divalent ions during partial desalination of brackish water using electrodialysis (ED). An experiment was conducted with a benchtop PCCell electrodialysis instrument in batch mode with a non-ion selective membrane. The removal rate of total copper, a valuable plant micronutrient, was analysed. Both copper chloride and copper sulphate removal compared to sodium chloride removal were studied. The copper and the sulphate content in the diluate declined logarithmically with a removal rate of around 98 % for copper in both experiments, and 100 % for sulphate over three hours at a starting temperature of 23 °C. Copper and sulphate were removed faster than sodium chloride at 72 %. The temperature of the diluate increased by 15 % during the threehour run. The loss of water from the diluate was approximately 10 %, limiting brine production.Modelling indicated that the Mass/Charge ratio of ions could be an indicator of the removal rate of anions, especially if they have, like sulphur, a large effective radius, whereas the Effective Ionic Radius can be an indicator for the removal of cations. The smaller the ionic radius, the faster the removal rate of the cation. This model can be used to customise nutrient concentration in the water end product. The customised water has a potential to be used for fertigation, saving the farmer money by retaining beneficial plant nutrients in the water.

Large-scale association analysis of climate drought and decline in groundwater quantity using Gaussian process classification (case study: 609 study area of Iran)

“…It should be noted that the condition δ (1) does not exist because the input layer is considered as observational values and is used as a training set. Therefore, there are no errors with input [27].…”

“…Therefore, awareness of the future status of water resources, especially in standard drinking water classes, is very important for urban and rural communities [1]. The level of groundwater resources is changing rapidly and this requires the discovery of newer groundwater resources [2].…”

Treatment of greenhouse wastewater for reuse or disposal using monovalent selective electrodialysis

“…Aligned with industry use, the literature has mainly investigated the monovalent selectivity of MSED for concentrated seawater salinities [11,12,13]. More recent studies have been conducted on recovery of nutrients, particularly ammonium and phosphate, from industrial and municipal wastewaters [8,14,15,16] and removal of sodium or nitrate from groundwater [17,18,19,20,21]. Ahdab et al [20,21] concluded that the Neosepta CMS/ACS membranes and Fujifilm Type 16 membranes are selective towards sodium for 16 diverse BGW compositions.…”

Thermodynamic and Kinetic Behaviors of Copper (II) and Methyl Orange (MO) Adsorption on Unmodified and Modified Kaolinite Clay

“…Purification of water can be achieved by physicochemical and biological methods. The physicochemical methods include precipitation [7], membrane filtration [8], liquid-liquid extraction [9] reverse osmosis [10], electrolysis or ultrasonic electrolysis [11], electrodialysis [12], electrodeposition [13], ion exchange resins [14], incineration and electrokinetic method [15], flotation [16], flocculation [17], coagulation [18], photocatalysis [19], adsorption and biosorption [20]. Biological process includes biodegradation or bioremediation [21], phycoremediation [22].…”