US 2026/0152416 A1 · SPOIL-BASED LIGHTWEIGHT POROUS BACKFILL FOR PURIFYING WASTE GAS AND WASTEWATER AND METHOD OF USE THEREOF

Spoil-based lightweight porous backfill for purifying waste gas and wastewater and method of use thereof

AssigneesChina State Construction Engineering (HongKong) Limited, Shenzhen University, China Construction Civil Engineering Co., Ltd., China State Construction International Holdings Limited

InventorsXIAOHUI SUN, MING ZHANG, YUEFENG BI, CHANGQING CHEN, XIANGSHENG CHEN, YUEFU ZHOU, XI CHEN, FOCI CHEN, ZIJUN DONG, YUE GAO, HEFU PU, YI JIANG, YUNZHE TONG

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Abstract

A spoil-based lightweight porous backfill for purifying waste gas and wastewater and a method of use thereof are disclosed. The spoil-based lightweight porous backfill is formed with a plurality of interconnected pores, and the pores are loaded with a purification material. The purification material can purify wastewater and/or waste gas passing through the pores. Compared to traditional closed-cell porous backfills, the spoil-based lightweight porous backfill of the present technical solution is of an open-cell type, possessing strong adsorption capacity. After being loaded with the purification material, it can serve as a multifunctional purification body to provide a purification function for treating low-concentration wastewater and waste gas, thereby realizing an environmental purification function on the basis of providing a backfilling function.

Claims5

Dependent claims

A spoil-based lightweight porous backfill for purifying waste gas and wastewater, comprising:

a porous structure comprising a plurality of interconnected pores;
wherein the pores are configured to load a purification material, and the purification material is configured to purify wastewater and/or waste gas passing through the pores;
wherein an open porosity of the spoil-based lightweight porous backfill is 10-80%;
wherein the purification material comprises at least one of a metal oxide, an oxidizing agent, a nanomaterial, or a polymer material;
wherein the spoil-based lightweight porous backfill comprises 100 parts of dry spoil, 20-30 parts of a geopolymer-based curing agent, 65-75 parts of water, 0.185-0.205 parts of a thickening agent, and 2.775-6.15 parts of a pore-forming agent;
wherein the geopolymer-based curing agent comprises cement, metakaolin, and water glass in a mass ratio of 32:48:20.

3 more elements

Dependencies are inferred from the claim text.