Systems and methods for treatment of an effluent stream are disclosed. In an aspect, a system can comprise an input configured to receive a brine solution, a purification component in communication with the input and configured to receive the brine solution therefrom, the purification component comprising activated carbon, wherein the brine solution is caused to pass through the activated carbon to produce a purified solution, and an output in communication with the purification component to receive the purified solution therefrom.

A movable device, e.g., a laboratory, for obtaining lithium salt from brine has a movable box, and a device for removing impurities from brine and a lithium precipitation device that are disposed in the movable box. The device for removing impurities from brine is connected to the lithium precipitation device. The device for removing impurities from brine comprises one or more of an adsorption-separation device, a membrane device, an electrodialysis device, a device for deeply removing impurities with resin, and an evaporation device. The laboratory is in a form of box modular assembly and may be placed on a truck and flexibly transported to a brine lake. In a case of a large-scale pilot test, an adsorption-membrane coupling technology to evaporation and lithium precipitation may be completely implemented, so that a simulation test of a whole lithium carbonate process may be carried out on site.

A movable device, e.g., a laboratory, for obtaining lithium salt from brine has a movable box, and a device for removing impurities from brine and a lithium precipitation device that are disposed in the movable box. The device for removing impurities from brine is connected to the lithium precipitation device. The device for removing impurities from brine comprises one or more of an adsorption-separation device, a membrane device, an electrodialysis device, a device for deeply removing impurities with resin, and an evaporation device. The laboratory is in a form of box modular assembly and may be placed on a truck and flexibly transported to a brine lake. In a case of a large-scale pilot test, an adsorption-membrane coupling technology to evaporation and lithium precipitation may be completely implemented, so that a simulation test of a whole lithium carbonate process may be carried out on site.

A process for the preparation of purified potassium chloride comprises the at least partial removal of one or more class 1 heavy metal impurity (lead, arsenic, cadmium and/or mercury) from potassium chloride process liquor by an ion exchange step. The process uses an ion exchange resin and achieves high levels of purity and is compatible with high flow rates. A recrystallisation step (e.g. a cooling crystallization step) may be employed subsequent to the ion exchange step.

A process for the preparation of purified potassium chloride comprises the at least partial removal of one or more class 1 heavy metal impurity (lead, arsenic, cadmium and/or mercury) from potassium chloride process liquor by an ion exchange step. The process uses an ion exchange resin and achieves high levels of purity and is compatible with high flow rates. A recrystallisation step (e.g. a cooling crystallization step) may be employed subsequent to the ion exchange step.

A method for producing and purifying sodium bromide using the coke from waste circuit boards pyrolysis residues as reducing agent, belonging to the field of purifying sodium bromide and high-value utilization, and more particularly, relating to a method for reducing and purifying crude bromine salt obtained from waste circuit boards smelting ash by using the coke in waste circuit boards pyrolysis residues. The main steps are as follows: carbonization conversion, water dissolution, filtration, and concentrated crystallization under vacuum heating. The pure sodium bromide was obtained by reducing crude bromine salt enriched from waste circuit board smelting ash by using the coke in waste circuit boards pyrolysis residues, realizing the resource coupling and high-value utilization of the two wastes, avoiding the secondary pollution in the process of recycling the waste circuit boards. It has the characteristics of simple operation, high resource utilization rate and no tail liquid discharge.

A method for producing and purifying sodium bromide using the coke from waste circuit boards pyrolysis residues as reducing agent, belonging to the field of purifying sodium bromide and high-value utilization, and more particularly, relating to a method for reducing and purifying crude bromine salt obtained from waste circuit boards smelting ash by using the coke in waste circuit boards pyrolysis residues. The main steps are as follows: carbonization conversion, water dissolution, filtration, and concentrated crystallization under vacuum heating. The pure sodium bromide was obtained by reducing crude bromine salt enriched from waste circuit board smelting ash by using the coke in waste circuit boards pyrolysis residues, realizing the resource coupling and high-value utilization of the two wastes, avoiding the secondary pollution in the process of recycling the waste circuit boards. It has the characteristics of simple operation, high resource utilization rate and no tail liquid discharge.