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Preparation method of biochar by adaptable vegetation in Three Gorges and application thereof

A technology of biochar and vegetation, applied in the direction of chemical instruments and methods, water pollutants, and other chemical processes, can solve the problems of the decline of vegetation fitness in the water-fluctuation zone and the eutrophication of tributary water bodies, etc.

Pending Publication Date: 2018-12-07
CHONGQING THREE GORGES UNIV
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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a preparation method of biochar suitable for vegetation in the Three Gorges and its application, and provide a feasible way to solve the problems of the decline of vegetation suitability in the water-fluctuation zone and the eutrophication of tributary water bodies and the water ecological safety of the reservoir area

Method used

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  • Preparation method of biochar by adaptable vegetation in Three Gorges and application thereof
  • Preparation method of biochar by adaptable vegetation in Three Gorges and application thereof
  • Preparation method of biochar by adaptable vegetation in Three Gorges and application thereof

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preparation example Construction

[0031] 1.1 Provide a kind of Three Gorges suitable vegetation biochar preparation method below, comprise the following operations:

[0032] 1) using the suitable vegetation in the water-fluctuating zone as the preparation raw material, after cleaning and air-drying the suitable vegetation, successively crushing and drying;

[0033] 2) Preparation of biochar: put the crushed and dried suitable vegetation into the muffle furnace, pass in nitrogen gas to separate oxygen, continue to heat up to 380-400°C, burn at constant temperature for 2-3 hours, and pyrolyze and carbonize to obtain biochar; Cool to room temperature, grind through a 10-80 mesh sieve, wash with water several times, remove surface ash, and dry.

[0034] The as-prepared biochar was also subjected to mild alkali modification:

[0035] Take biochar and add it to the mild alkali reaction solution for soaking and modification; the mild alkali reaction solution is NaOH and H 2 o 2 A mixed solution composed of NaOH ma...

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Abstract

The invention discloses a preparation method of biochar by adaptable vegetation in Three Gorges and an application thereof. The biochar of the adaptable vegetation in the water-level-fluctuating zonesof branches of Three Gorges reservoir region is adopted as a research object, the adaptable vegetation (cynodon dactylon) is utilized as a core material for preparing the biochar, the influence of the modified biochar of the adaptable vegetation on the nitrogen adsorbing effect is researched, the char prepared by adopting the cynodon dactylon as the material and the modified char have higher adsorption for ammonium and nitrogen in solution respectively, which is possibly related to carbon content and cation exchange capacity; the biochar has the characteristics of a developed porous structure, a large surface area, more surface negative charges and a high charge density and the like, so that the ion exchange capacity and the nutrient adsorbing effect of the biochar can be enhanced; inorganic ions in water, soil or deposits can be adsorbed and immobilized by the biochar, and the biochar has stronger adsorbing capacity to NH4+-N ions.

Description

technical field [0001] The invention belongs to the technical field of ecological management of the Three Gorges water-fluctuation zone, and relates to a preparation method and application of Three Gorges suitable vegetation biochar. Background technique [0002] After the Three Gorges Reservoir was impounded, the water flow in its tributaries slowed down, which affected the turnover rate of elements, weakened the ability of the water body to purify itself and buffer external disturbances, and formed the world's largest hydrofluctuation zone. The water-fluctuation zone is a special water-land transitional zone formed by the Three Gorges Reservoir's water transfer measures of "storage, discharge and mixing" that periodically floods and falls dry. It is an ecological vulnerability that affects the energy flow and material cycle of the ecosystem in the Three Gorges Reservoir area. With periodic flooding and drying, the water flow rate is slow, and the migration and transformati...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/42B09C1/00C02F101/16
CPCB01J20/02B01J20/0229B01J20/0288B01J20/041B01J20/20B09C1/00C02F1/283C02F1/42C02F2001/425C02F2101/16
Inventor 林俊杰尹静许景钫刘丹兰波何立平曲衍桦曹晓龙周爽陈茜张帅
Owner CHONGQING THREE GORGES UNIV
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