South China University of Technology

Environmental Protection Science and Technology Co. Ltd., Xifu, Guangdong

Nengwu Zhu

Pingxiao Wu

Zhi Dang

Jian Wang

Yi Liu

Xinghong Jin

Tingting Yang

Zongcai Huang

Manying Chen

Taiping Zhang

Yuewu Li

Meiqing Chen

Shanshan Yang

Huageng Hu

A magnetic magnesium-manganese layered double metal oxide composite and preparation and application. A soluble magnesium salt and a soluble manganese salt are dissolved in water to obtain a magnesium-manganese salt complex liquid; and a soluble carbonate and a soluble hydroxide are dissolved in water to obtain a carbonate-hydroxide complex liquid; a ferroferric oxide powder is added to the carbonate-hydroxide complex liquid, and then ethanol is added for ultrasonic dispersion to obtain a dispersion liquid; then the magnesium-manganese salt complex liquid is added for aging, centrifuging, washing, drying, grinding for sieving, and calcinating at 250-550° C. to obtain a magnetic magnesium-manganese layered double metal oxide composite. The composite of the present invention has relatively strong magnetism to Cd removal, and is featured by high adsorption efficiency, rapid adsorption rate and stability. Moreover, the composite can not only immobilize Cd efficiently, but also can be separated and recycled by magnet.

Magnetic magnesium-manganese layered double metal oxide composite and preparation and application

A zero-valent iron pillared montmorillonite repair material relates to the field of environmental functional materials. A preparation method thereof is mainly to obtain the zero-valent iron pillared montmorillonite repair material by reducing hydroxyl-iron pillared montmorillonite at high temperature in a mixed atmosphere of hydrogen and nitrogen, and mainly includes: (1) preparation of Na-montmorillonite; (2) preparation of a polyhydroxy-iron pillared solution; (3) preparation of hydroxy-iron pillared montmorillonite; and (4) obtaining the zero-valent iron pillared montmorillonite repair material by means of high-temperature reduction-calcination in the mixed atmosphere of hydrogen and nitrogen. The zero-valent iron pillared montmorillonite repair material can be used for removing degradation-resistant organic pollutants, and degrading organics into small molecular organics by means of peroxymonosulfate (PMS).

Zero-valent iron pillared montmorillonite repair material, and preparation method therefor and application thereof

A kitchen waste treatment device in environment-protection-device field comprises a main fermentation barrel comprising a barrel body mounted on supporting brackets and including a feed inlet, a discharge outlet and a material chamber, push plates located within the material chamber to push materials therein to move along barrel body axial direction and further a gas inlet system having gas inlets located at same barrel body end as the discharge outlet and a gas-exhaust system having gas-exhaust ports located at same barrel body end as the feed inlet; a feeding apparatus whose feed end communicates with the feed inlet; and a power apparatus driving the barrel body to rotate around its axis. The gas inlets/gas-exhaust ports communicate with the material chamber. The treatment device has simple compact structure and small occupied area and realizes material horizontal propulsion and repeated rotational-stirring in the barrel body by barrel body rotation, achieving material-degrading-and-fermenting object.

Kitchen waste treatment device

Provided are a method for preparing kaolin immobilized GY2B bacteria and use thereof.

Method for preparing kaolin immobilized GY2B bacteria and application thereof

Growing community of inventors

Guangzhou, China

Nengwu Zhu