Kabushiki Kaisha Toshiba

Tohoku University

Tatsuoki Kohno

Akiko Suzuki

Hideyuki Tsuji

Shinetsu Fujieda

Nobuyuki Ashikaga

Norio Takami

Shinji Murai

Motoya Kanda

Taro Fukaya

Takao Sawa

Fumiyuki Kawashima

Hiroki Inagaki

Hideki Yoshida

Masaaki Yamamoto

Tomokazu Morita

Isao Sakai

Hirotaka Hayashida

Shusuke Inada

Takamichi Inaba

Arisa Yamada

Hiroshi Kitayama

Shinji Tsuruta

Shirou Takeno

Katsuya Yamamoto

Satoshi Haraguchi

Shinsuke Matsuno

Toshihiro Imada

Kazuhiko Noda

Masahiko Tsutsumi

Hidetake Shiire

Shinobu Moniwa

Satomi Ebihara

Toshihide Takahashi

Haruchika Ishii

Ichiro Tai

Tokusuke Hayami

Yuko Nakamori

Shin-ichi Orimo

Hidetaki Shiire

Mari Iwashita

There is provided an efficient treatment method for boron-containing water capable of reducing an amount of use of medical agent and an amount of generation of sludge. A treatment method for boron-containing water of an embodiment includes a first process of concentrating boron-containing water to obtain boron-concentrated liquid. Further, the method includes a second process of making the boron-concentrated liquid to be brought into contact with a layered inorganic hydroxide, and making the layered inorganic hydroxide adsorb boron in the boron-concentrated liquid to remove boron.

Method for treating boron-containing water

According to one embodiment, water to be treated is passed through each of a first reactor vessel and second reactor vessel, phosphorus contained in the water is removed by using an adsorbent, thereafter the liquid held in each of the reactor vessels is discharged from each of a first treated water discharge path and second treated water discharge path, and thus the influence of soluble impurities derived from the water is eliminated. Further, when suspended solids impurities contained in the water are accumulated in the phosphorus adsorbent, the accumulated impurities are eliminated by a reverse cleaning operation using a liquid to be thereafter introduced from a reactor vessel liquid introduction path into the reactor vessel, and hence the influence of the suspended solids in the water on a desorption agent liquid to be thereafter introduced into a crystallization vessel, and containing phosphorus from the phosphorus adsorbent is eliminated.

Water treatment equipment

According to one embodiment, an oil adsorbent includes inorganic particles and a polymer formed on surfaces of or between the inorganic particles. The content rate of the inorganic particles is 50% by volume or more and 97% by volume or less relative to the inorganic particles and the polymer, and an area of the inorganic particles is 30% or more and 60% or less relative to a cross-section of the inorganic particles and the polymer.

Oil adsorbent and method of manufacturing oil adsorbent

The present embodiment relates to a method for recovering a boron adsorbent, including: preparing water having an electric resistivity of 0.01 M&#x3a9;&#xb7;cm or more and kept at a temperature within a temperature range; and contacting the water with the boron adsorbent to release boron adsorbed at the boron adsorbent.

Method for recovering a boron adsorbent

An oil adsorbent is configured so as to include: at least one particle of an inorganic particle and a metallic particle, at least one particle constituting a core; and a polymer covering the core, wherein the polymer is a copolymer made of at least one substance selected from the group of molecular structure A consisting of styrene, butadiene, isoprene, ethylene and propylene and at least one substance selected from the group of molecular structure B consisting of acrylic acid, methacrylic acid, acrylonitrile, vinylpyridine, vinyl alcohol, maleic anhydride and maleic acid.

Oil adsorbent, and method for recovering oil

A polymer composite is provided for a water treatment. The polymer composite with excellent workability is capable of adsorbing impurities in water, being rapidly separated from the water using magnetic forces. The polymer composite includes secondary aggregates. The secondary aggregates are formed of clumped particles, the particles being magnetic particles covered with a polymer. The polymer composite has porous structures suitable for adsorbing underwater impurities.

Polymer composite, water-treatment method using the same and manufacturing method of the same

The present invention provides a functional powder capable of effectively adsorbing impurities in water treatment. The powder can be rapidly separated by use of magnetic force, and hence is excellent in workability. This functional powder comprises magnetic particles having surfaces modified with hydrophobic groups and hydrophilic groups loaded thereon. The hydrophobic groups have a function of adsorbing the impurities, and the hydrophilic groups have a function of dispersing the powder stably in water. The numbers M and N of the hydrophobic groups and the hydrophilic groups, respectively, satisfy the condition of 0.2&#x3c;M/N&#x3c;0.8, so that the adsorbability to impurities and the dispersion stability are both ensured.

Functional powder and water treatment method employing the same

A wastewater treatment method in an embodiment includes: mixing primary aggregates made of magnetic substances and a dispersion medium to make a suspension; and passing the suspension through a filter to allow the primary aggregates to remain on the filter and to form a secondary aggregate made of an aggregate of the primary aggregates. Further, the wastewater treatment method in the embodiment includes; passing wastewater through the secondary aggregate to remove suspended solids and oil in the wastewater; dispersing the secondary aggregate in a dispersion medium to decompose the secondary aggregate into the primary aggregates and to wash the primary aggregates; and collecting the primary aggregates with magnetic separation.

Wastewater treatment method

An oil adsorbent includes a plurality of particles, each being constituted from at least one of an inorganic particle and an organic particle as a core and a polymer covering the core. The plurality of particles are aggregated to form an aggregate so that a porosity of the aggregate is 70% or more.

Oil adsorbent, and method for recovering the same

According to one embodiment, in order to eliminate impurities, and the like, water to be treated is passed through each of reactor vessels, phosphorus contained in the water to be treated is removed by using an adsorbent, and thereafter the liquid held in each of the reactor vessels is discharged through each of first to third treated water discharge paths, thereby eliminating the impurities, and the like derived from the water to be treated. It is possible to eliminate the influence of the impurities in the water to be treated on the discharged desorption agent liquid containing phosphorus from the phosphorus adsorbent can be eliminated, and hence it is possible to obtain a phosphorus-containing liquid containing no substance other than the recovered phosphoric matter material.

Water treatment equipment for recovering phosphorus from water

An adsorbent includes: at least one of an inorganic particle and a metallic particle as a core; at least two kinds of polymers, which cover a surface of the core, with respective different surface tensions; and a convex-concave surface structure formed due to a difference in surface tension between the at least two kinds of polymers.

Adsorbent, method for recovering an organic matter and method for recovering an oil

A phosphorus compound adsorbent; a phosphorus compound adsorption system, wherein the phosphorus compound adsorbed can be desorbed in a neutral solvent; and a method of using the phosphorus compound adsorbent are provided. The phosphorus compound adsorbent includes a nitrogen-containing compound having an amino group at an end of the molecular structure, a support carrying the nitrogen-containing compound, and at least one metal ion selected from the group consisting of a zinc ion, a copper ion, an iron ion, and a zirconium ion, which is fixed to the nitrogen-containing compound.

Phosphorus compound adsorbent, phosphorus compound adsorption system, and method of using phosphorus compound adsorbent

A hydrogen storage alloy includes a composition defined by the following formula (CaL)(LiMNi), wherein the L denotes one or more elements selected from the group consisting of Na, K, Rb, Cs, Mg, Sr, Ba, Sc, Ti, Zr, Hf, V, Nb, Ta, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, the M denotes one or more elements selected from the group consisting of Cr, Mo, W, Mn, Fe, Ru, Co, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, B, Al, Ga, In, Si, Ge, Sn, Pb, Sb, Bi, and S, and the mole ratios X, Y, Z, and m respectively satisfy the following 0&#x3c;X&#x2266;0.4, 0&#x2266;Y&#x2266;0.4, 0.1&#x2266;Z&#x2266;0.4, and 1.8&#x2266;m&#x2266;2.2.

Hydrogen storage alloy, hydrogen separation membrane, hydrogen storage tank, and hydrogen absorption and desorption method

A hydrogen occlusive alloy has a cubic structure and a composition represented by the following general formula (1):(MgL)(NiMLi)&#x2003;&#x2003;(1)where the element L is at least one element selected from the group consisting of Na, Cs, Ca, Sr, Ba, Sc, Ti, Zr, Hf, V, Nb, Ta, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, the element M is at least one element selected from the group consisting of Cr, Mo, W, Mn, Fe, Co, Pd, Pt, Cu, Ag, Zn, Cd, B, Al, Ga, In, Si, Ge, Sn, Pb, Sb and Bi, and mole ratios X, Y, Z and m are 0&#x3c;X&#x2266;0.5, 0&#x3c;Y&#x2266;0.5, 0.1&#x2266;Z&#x2266;0.9, and 1.8&#x2266;m&#x2266;2.2, respectively.

Hydrogen occlusive alloy, hydrogen storage film and hydrogen storage tank

Growing community of inventors

Tokyo, Japan

Tatsuoki Kohno