Abstract: A biochar is produced by co-pyrolysing an aquatic plant enriched with heavy metals with a clay mineral, and the aquatic plants themselves have high enrichment and adsorb heavy metals in contaminated water; heavy metals are in situ adsorbed, and are coated or enriched in the biochar, therefore extending the migration time of heavy metals, which are also very stable; attapulgite and montmorillonite as clay minerals are loaded in the biochar during the preparing process; heavy metals contained in the biochar play a catalytic role, and synergy with activated attapulgite, therefore increasing the reliability of the biochar, and effectively reducing the ecological effectiveness and potential risk of heavy metals in the biochar.

Abstract: An immobilized microbial agent for in situ restoration of contaminated sediments, composed of Hangjin clay 2 #-loaded conductive microorganisms, obtained by the following methods: 1) pretreating Hangjin clay 2 # to obtain particulate filler; 2) amplification culture of conductive microorganisms to a bacterial liquid to be inoculated, and adding the Hangjin clay 2 # pretreated in step 1 in a certain ratio, mixing under anaerobic conditions, removing the supernatant after standing, and obtaining the immobilized microbial agent; the conductive microorganisms are Geobacter sulfurreducens, Geobacter metallireducens and Shewanella. The invention also discloses a method for preparing the immobilized microbial agent and the application of in situ restoration of contaminated sediments.

Abstract: A process for producing a heavy metal mediated biochar composite using silicate solidification. Hydrocharis dubia has excellent enrichment of manganese ions in sewage, and is used to treat sewage water to adsorb heavy metals such as lead, manganese and zinc contained in the sewage water into roots, stems and leaves thereof, which are pyrolysed in stages at high temperature with activated red mud and bentonite prior to blending with zeolites, to produce said heavy metal mediated biochar composite; the process significantly extends the migration time of heavy metals, increases the stability of heavy metals and reduces the risk of environmental pollution by heavy metal leakage.

Abstract: A porous biochar for improving heavy pollution and a method for producing the same. Said porous biochar is prepared as follows: arrowhead, which has excellent enrichment of lead, is used to absorb heavy metal lead in polluted water or artificial wetlands, simultaneously absorb heavy metal cadmium, thereafter is dried and treated as a biomass, and then the biomass is calcined in stages with a passivating agent in a high temperature environment, so as to heavy metals such as lead and cadmium be stably coated or enriched in a biochar, which is mixed with Pseudomonas aeruginosa having high resistant, to obtain the porous biochar; the porous biochar has high specific surface area, high porosity and excellent mechanical properties, is very stable under different acid-base environments and oxidizing conditions.

Abstract: A composite biochar for controlling heavy metal pollution and a process for producing the same, in particular enrichment of heavy metals such as arsenic and lead in soil with centipede grass, thereafter centipede grass is sintered with hydroxyapatite, sepiolite and chitosan, and compounded with microorganisms to produce said composite biochar; through the process of the present invention, heavy metals such as arsenic and lead are stably enriched or coated in said composite biochar, significantly reducing the potential hazard of arsenic and lead to the environment, and also providing new developmental ideas for treating heavy metal biomass.

Abstract: An autotransformer (AT) traction power supply system equipped with 2×27.5 kV outdoor modularized electric apparatus comprises a traction substation located beside an electrified railway, which connects with an up and a down line traction network at output terminal, a parallel apparatus located in the middle and the end of a feeder in the up and down line traction network, which functions as parallel power supply operation, and an over-zone apparatus located around a neutral section insulator between feeders of the up and down line traction network of two adjacent traction substations, which functions as over-zone power supply operation. The parallel apparatus connected with an AT equipment is a modularized electric apparatus which comprises four parallel power supply units. The AT equipment comprises four integrated AT substations which include the first AT, the second AT and an AT modularized electric apparatus.

Abstract: An autotransformer (AT) traction power supply system equipped with 2×27.5 kV outdoor modularized electric apparatus comprises a traction substation located beside an electrified railway, which connects with an up and a down line traction network at output terminal, a parallel apparatus located in the middle and the end of a feeder in the up and down line traction network, which functions as parallel power supply operation, and an over-zone apparatus located around a neutral section insulator between feeders of the up and down line traction network of two adjacent traction substations, which functions as over-zone power supply operation. The parallel apparatus connected with an AT equipment is a modularized electric apparatus which comprises four parallel power supply units. The AT equipment comprises four integrated AT substations which include the first AT, the second AT and an AT modularized electric apparatus.