Method for treating heavy metal/organic matter combined pollution wastewater by using solid waste biomass carbonized material

A biochar and composite pollution technology, applied in chemical instruments and methods, water pollutants, separation methods, etc., can solve the problems of efficiency decline, microporous structure unfavorable removal of macromolecular organic pollutants, etc., and achieve the goal of improving governance efficiency Effect

Active Publication Date: 2021-06-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its microporous structure is not conducive to the removal of macromolecular organic pollutants, and the efficiency drops significantly after regeneration, which is another shortcoming.

Method used

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  • Method for treating heavy metal/organic matter combined pollution wastewater by using solid waste biomass carbonized material
  • Method for treating heavy metal/organic matter combined pollution wastewater by using solid waste biomass carbonized material
  • Method for treating heavy metal/organic matter combined pollution wastewater by using solid waste biomass carbonized material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Solid Waste Biomass Carbonization Material Efficiently Removes Pb 2+ / TC compound pollution

[0029] Preparation of solid waste biomass carbonization material, the steps are as follows:

[0030] 1) Wash the collected solid waste raw banana peel with ultrapure water several times to remove dirt, and then dry it in an oven at 105 °C for 12 h; use a pulverizer to crush the dried banana peel to 100 mesh, Soak the crushed banana peel in normal water temperature for 24 hours, filter and dry at 80°C for 12 hours to obtain dry powder;

[0031] 2) Add the dried powder obtained in step 1) to the pre-prepared LiCl-ZnCl at a mass ratio of 1:2 2 In mixed salt (pre-prepared LiCl-ZnCl 2 Mixed salt refers to LiCl and ZnCl 2 The weight ratio is 1:1, and the uniform mixed salt is ground through a 300-mesh sieve), and the mixed material is put into a tube furnace, under N 2 Under atmosphere, react at 350 ℃ for 2 h; take it out and place it in 0.1M HCl solution and stir for ...

Embodiment 2

[0045] Example 2 Solid Waste Biomass Carbonization Material Efficiently Treats Pb 2+ / TC pollution.

[0046] The solid biomass carbonization material prepared in embodiment 2 is applied to the Pb in the control water body 2+ and tetracycline (TC) pollution, the specific process is as follows:

[0047] S1: Using ultrapure water as the solvent, prepare the concentration of 200 mg / L Pb respectively 2+ and a solution of 50 mg / L TC. Within the tolerance range of ±0.2, use 0.1 M NaOH and HNO respectively 3 solution to adjust the pH value of the solution, corresponding to the Pb 2+ The solution was adjusted to pH = 7 and the TC solution was adjusted to pH = 3; respectively, 20 mL of the prepared Pb 2+ and TC solution, each adding 10 mg of the solid waste biomass carbonized material prepared in Example 1, adding 10 μL of 5 mM NaNO 3 As a background electrolyte, it was rotated and shaken on a 70 rpm digitally controlled rotary mixer for 48 h, so that the added solid biomass carbo...

Embodiment 3

[0049] Example 3 Efficient Treatment of Solid Waste Biomass Carbonization Materials Containing Pb 2+ / TC polluted printing and dyeing wastewater.

[0050] The solid waste biomass carbonization material prepared in Example 3 is applied to the treatment of heavy metal / new organic compound pollution, and the specific process is as follows:

[0051] S1: Take actual printing and dyeing wastewater samples to further evaluate the prepared solid waste biomass carbonization materials. Set the Pb in the actual water sample 2+ and TC were added at concentrations of 200 mg / L (pH = 7) and 50 mg / L (pH = 3), respectively. 20 mL printing and dyeing wastewater water sample, add 10 mg of biochar prepared in Example 1, add 10 μL of 5 mM NaNO 3 As the background electrolyte, it was rotated and shaken on a 70rpm digitally controlled rotary mixer for 48 hours, so that the added solid waste biomass carbonization material could fully absorb the pollutants in the water. After 48 hours of adsorptio...

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Abstract

The invention discloses a method for treating heavy metal / organic matter combined pollution wastewater by using a solid waste biomass carbonized material, which specifically comprises the following steps: adding the biomass carbonized material into a water body containing heavy metal / organic matter combined pollution pollutant, then adding NaNO3 as a background electrolyte, and carrying out adsorption reaction on heavy metal / organic matter in water after adjusting the pH value; after a certain period of time, filtering and separating the biochar by using a microporous membrane to obtain treated water; and recycling the separated solid waste biochar through acid pickling treatment. The solid waste biomass carbonized material is prepared by taking fruit and vegetable solid wastes as raw materials and adopting a molten salt method, and then surface modification is performed by utilizing an oxidation treatment process to obtain the solid waste biomass carbonized material. According to the method, solid waste is subjected to resource utilization after treatment, waste material conversion is achieved, and the prepared biochar not only contains rich functional groups, but also has a special pore structure, can synergistically exert physical and chemical adsorption, and can more effectively treat heavy metal / organic pollutant combined pollutant in wastewater.

Description

technical field [0001] The invention relates to the technical field of heavy metal / organic compound pollution treatment, in particular to a method for treating heavy metal / organic compound polluted wastewater with solid waste biomass carbonization materials. Background technique [0002] In order to meet the needs of human life and industrial production, chemical agents are widely used, and the generated wastewater contains a large amount of heavy metals and organic substances (such as antibiotics). Heavy metals are difficult to remove after entering the water body, causing continuous toxicity to environmental organisms; and some organic substances, such as antibiotics, will destroy the water ecosystem after entering the water body, resulting in black and odorous water bodies. When heavy metals and organic matter pollute the water body at the same time, compound pollution is prone to occur. At present, heavy metal / organic compound pollution can be treated by electrochemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/20B01J20/30B01J20/32B01J20/34C02F101/20C02F101/30
CPCC02F1/283B01J20/20B01J20/3071B01J20/3021B01J20/3078B01J20/3085B01J20/32B01J20/3475C02F2101/20C02F2101/30C02F2303/16B01J2220/4887
Inventor 胡钟霆费燕飞王家德叶志平陈景欢王军良丁寅金子彦陈月
Owner ZHEJIANG UNIV OF TECH
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