摘要:
This application relates generally to a process for regeneration of anion exchange resins and more particularly to regeneration using inorganic fertilizer solutions (e.g., solutions of magnesium, calcium, potassium, and ammonium salts) to remove nitrate and other contaminants from the anion exchange resins.
摘要:
A metalloid contaminated liquid water solution purification process providing decrease to safe human consumption-rated levels of metalloid concentration therein, by precipitation without oxidation and without liquid water heating. The process comprises the following steps: injecting a ferric iron coagulant; injection of lime in the liquid solution; precipitating the metalloid; separating the resulting slurry between a liquid and a solid phase, wherein a clarified water solution is obtained; wherein the liquid phase of the solution is economically reclaimed, while the solid phase slurry is disposed of.
摘要:
Improved methods and systems for treating wastewaters produced in mining and/or subterranean well bore operations are provided. In one embodiment, the systems comprise: an electro-coagulation unit that receives wastewater from a wastewater source, performs an electro-coagulation treatment on the wastewater using one or more EC cells, and produces a first fluid stream that comprises one or more solid materials and a liquid effluent; a solids separation unit coupled downstream of and in fluid communication with the electro-coagulation unit that separates at least a portion of the solid materials in the first fluid stream from the liquid effluent; and a filter comprising a metal-bearing filtration media coupled downstream of and in fluid communication with the solids separation unit that filters the liquid effluent from the solids separation unit to produce a treated water stream.
摘要:
Nanoscale zero-valent iron (NZVI) particles or Ca-alginate-entrapped NZVI, are provided for use in environmental remediation, decontamination, and pollution control. When charged with a sorbed nutrient such as phosphate or selenium, they can be used as fertilizer.
摘要:
This disclosure relates generally to methods and rare earth-containing additives for removing target materials in the form of hydroxides, carbonates, hydrates, or oxyhydroxyls from, a typically aqueous, liquid medium.
摘要:
An enclosed bioremediation system utilizing resistant micro-evolved microbes for treatment of wastewater and recovery of chemicals and metals and which also results in biomass and biochemical production and carbon capture.
摘要:
An electrochlorination and electrochemical system for the on-site generation and treatment of municipal water supplies and other reservoirs of water, by using a custom mixed oxidant and mixed reductant generating system for the enhanced destruction of water borne contaminants by creating custom oxidation-reduction-reactant chemistries with real time monitoring. A range of chemical precursors are provided that when acted upon in an electrochemical cell either create an enhanced oxidation, or reduction environment for the destruction or control of contaminants. Chemical agents that can be used to control standard water quality parameters such as total hardness, total alkalinity, pH, total dissolved solids, and the like are introduced via the chemical precursor injection subsystem infrequently or in real time based on sensor inputs and controller set points.
摘要:
A cerium (IV) oxide composition having unexpectedly greater arsenic loading capacities than oxides of cerium (IV) of the prior art are disclosed. The arsenic loading capacities are greater at low level equilibrium levels of arsenic. The cerium (IV) oxide composition is more effective at removing arsenite and arsenate. Moreover, the cerium (IV) oxide composition has a greater capacity for the previously more difficult to remove arsenite.
摘要:
The present invention relates to a method for decreasing the contents of metals, metalloids, nitrate and nitrite, respectively, in raw water flowing through a basin (1), whereby water containing either oxygen, oxygen-releasing substances, naturally occurring micro-organisms and/or substrates therefore is intermittently introduced to the basin (1) through horizontally arranged infiltration/extraction means (2) above and below the injection pipes of raw water, and by alternating the withdrawal and infiltration of conditioned water between the horizontal means so that essentially a vertical flow of water is created between these means, thereby creating a reaction zone for purification of raw water before it reaches the central extraction well. The water to be purified is fed into the basin by horizontally arranged feeding pipes (5) and the extraction of purified water from said at least one extraction well (3) is such that a substantially negative pressure is created around said at least one extraction well (3). The invention relates also to an apparatus for carrying out the method.
摘要:
The invention concerns a particle for recovering an anion from an aqueous solution comprising a magnetic material associated with a silica based layer forming a magnetic microparticle with a silica based surface, and a layered double hydroxide deposited on the surface of the microparticle. The invention further concerns a method for manufacturing a magnetic particle comprising mixing a magnetic microparticle with a silica based surface in an aqueous solution at about pH 7 with a dispersion of layered double hydroxide at about pH 7 to obtain a mixture, and ultrasonicating the mixture for depositing the layered double hydroxide on the surface of the microparticle. In addition, the invention concerns various uses of the particle.