Abstract:
The invention relates to composite adsorbent materials, and in particular, to highly porous carbon-based composite materials for the adsorption and stabilisation of inorganic substances. The composite adsorbent material comprises a porous carbon carrier matrix and an adsorbent species, wherein the adsorbent species is precipitated within the pores of the carrier matrix. The invention extends to various uses of such adsorbent materials, for example in water purification, recovery of metals from waste streams and remediation applications, and where the adsorbant material is amended into soil, waste etc. for the purpose of breaking pollutant-receptor linkages.
Abstract:
Provided is a preparation method of an oxygen-selective adsorbent selectively adsorbing oxygen in the air and an oxygen-selective adsorbent prepared thereby. The preparation method includes: preparing BaMg(CO3)2 particles or particles in which MgCO3 or Mg(OH)2 are attached to the outside of BaMg(CO3)2; and sintering the particles at a high temperature. The oxygen-selective adsorbent according to the present invention may adsorb oxygen in the air at a fast rate as compared with an existing oxygen-selective adsorbent and have high thermal stability and excellent oxygen adsorptivity.
Abstract:
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of coal containing natural levels of mercury.
Abstract:
A process for the efficient capture of CO2 and sulfur from combustion flue gas streams and gasification based fuel gas mixtures using regenerable and recyclable calcium based sorbents. The regeneration of the calcium sorbent is accomplished by hydrating the sorbent at high temperatures of about 600° C. and a pressure higher than 6 bars to lower the parasitic energy consumption.
Abstract:
The invention relates to a mixed salt composition which is useful as a CO2 sorbent. The mixed salt composition comprises a Mg salt, and at least one Group IA element salt, where the Mg and Group IA element are present at a molar ratio of from 3:1 to 8:1. The resulting composition can adsorb about 20% or more of CO2 in a gas. Via varying the molar ratios of the components, and the Group IA element, one can develop compositions which show optional functionality at different conditions. The composition is especially useful in the adsorptive capture of CO2 on mobile sources, such as transportation vehicles, where it can be recovered during regeneration of the adsorbent composition and the CO2 used as a coolant gas, as a reactant in manufacture of fuel, and so forth.
Abstract:
The invention has for its object to provide a preparation method for preparing an anion-exchangeable LDH by decarbonation of a carbonate ion type LDH, which makes sure de carbonation is implemented with safety in a continuous manner while crystal shape, crystal structure and crystallinity are kept intact.The invention provides a preparation method for preparing an anion-exchangeable, layered double hydroxide wherein a carbonate ion type layered double hydroxide (LDH) having a composition represented by a general formula: QxR(OH)z(CO32−)0.5-y/2(X−)y.nH2O where x is indicative of a numeral range of 1.8≦x≦4.2; z is indicative of 2(x+1); y is indicative of a minimum value of at least 0 that increases to less than 1 when anions (X−) remain or a part of anions is introduced; Q is a divalent metal ion; R is a trivalent metal ion; and n is 2±2 is used as a starting material, and y in said general formula increases to a maximum of 1 by substitution of a minus monovalent anion (X−1) at a carbonate ion site thereby implementing substitution, characterized in that the starting material is dispersed in an aqueous solution mixed with a salt containing minus monovalent anions (X−) in an amount enough for substitution at the carbonate ion site while said aqueous solution is kept at a pH (hydrogen ion exponent) of greater than 4 to less than 7.
Abstract:
A method of constructing a phosphorous adsorbing structure includes creating a design model that indicates a percentage of phosphorous removed from a water supply per an amount of a predetermined adsorbent exposed to the water supply based upon an original concentration of phosphorous in the water supply and a retention time of water in the adsorbing structure.
Abstract:
An oil absorbing material is generally provided. The oil absorbing material can includes sorbent particles having an average aspect ratio of about 5 to about 500 and a mean average particle diameter of about 10 μm to about 1 millimeter. The oil absorbing material comprises polypropylene, polyethylene, inorganic filler particles, and absorbent core material. In one embodiment, the sorbent particles can have an average specific surface area of about 0.25 to about 5.0 m2/g and can have a bulk density that is about 0.01 g/cm3 to about 0.8 g/cm3.Processes of making the oil absorbing material are also provided via a solid-state shear pulverization recycling process transforming absorbent article waste into the oil absorbing material. The process can include pulverizing the absorbent article waste to form sorbent particles while cooling the absorbent article waste in an amount sufficient to maintain the absorbent article waste in a solid state.
Abstract translation:通常设置吸油材料。 吸油材料可以包括具有约5至约500的平均纵横比和约10μm至约1毫米的平均平均粒径的吸附剂颗粒。 吸油材料包括聚丙烯,聚乙烯,无机填料颗粒和吸收芯材料。 在一个实施方案中,吸附剂颗粒可以具有约0.25至约5.0m 2 / g的平均比表面积,并且可以具有约0.01g / cm 3至约0.8g / cm 3的堆积密度。 制备吸油材料的方法也通过固体剪切粉碎再循环方法提供,将吸收制品废物转化成吸油材料。 该方法可以包括将吸收制品废物粉碎以形成吸附剂颗粒,同时以足以将吸收制品的废物保持在固体状态的量来冷却吸收制品废物。
Abstract:
An adsorbent composition and method of cleaning the industrial waste water using the composite is described. The method for removing heavy metals from contaminated water is done by mixing contaminated water having a concentration of one or more heavy metals with an adsorbent composite comprising granules of a mixture of 50.363 wt % kaolin clay, a 4.477 wt % roasted date pits powder, a 5.54 wt % silica powder a 14.99 wt % magnesite powder and a 24.623 wt % water. After reacting the contaminated water and adsorbent composite together for a specific time the water is filtered and was found to contain reduced amount of heavy metals. The cleaned water can further be used for industrial cooling systems or watering gardens.
Abstract:
Materials, compositions, substances and methods and systems for stormwater treatment in wet ponds, dry ponds and a green roof system. A first embodiment provides in-situ treatment unit within the retention pond by withdrawing the stored stormwater to circulate the stored stormwater into the in-situ treatment unit to sorb nitrogen from the stored stormwater. A second embodiment provides uses a riprap apron, a perforated riser located at the bottom of the riprap apron and a geotextile media encased in a sorption media jacket around the perforated riser. A third embodiment provides a green roof stormwater treatment system that includes protection for waterproofing and insulating the roof, a pollution control media layer for filtration and sorption of solids and dissolved materials found in stormwater, a growing media for growing vegetation, and a cistern to store the runoff stormwater between irrigation events. The green roof system includes recycling runoff stormwater by irrigating the green roof with the stored stormwater.