Porous biomass microspheres used for treating heavy metal sewage and preparation method of porous biomass microspheres

A biomass and microsphere technology, applied in the field of biomass, can solve the problems of single heavy metal element adsorption and single adsorption, and achieve the effect of excellent specific surface area.

Inactive Publication Date: 2018-01-09
NANJING SUHUAN ENVIRONMENTAL INTERCONNECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] South China Agricultural University discloses a biochar soil heavy metal remediation agent (CN 105622290 A). Biomass charcoal obtained by calcining chicken manure or camellia oleifera shells at a high temperature of 450-550°C has a good adsorption capacity for Cu in soil, but the adsorption of heavy metals The element is relatively single; CN 102583619 A reports a method for the adsorption of heavy metals by composite biomass. The composite biomass is formed from chestnut peel, rice aerial part biomass, and cattail aboveground part biomass, which can remove the heavy metals in the aqueous solution by adsorption. heavy metal
Ma Wei et al. (CN 103316640 B) of Dalian University of Technology developed a magnetic biomass adsorbent to remove heavy metals, using wood flour, fruit shells, and corn stalk biomass as raw materials for crushing and mixing, and then using chitosan solution of acetic acid Mix, add magnetic substances, and solidify with lye to obtain a magnetic biomass adsorbent, but only the adsorption capacity for As (V) is studied, so the adsorption is single

Method used

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  • Porous biomass microspheres used for treating heavy metal sewage and preparation method of porous biomass microspheres
  • Porous biomass microspheres used for treating heavy metal sewage and preparation method of porous biomass microspheres
  • Porous biomass microspheres used for treating heavy metal sewage and preparation method of porous biomass microspheres

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Experimental program
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Effect test

Embodiment 1

[0032] Preparation of porous biomass microspheres hybridized with inorganic materials:

[0033] 1) Modification of sorghum stalks:

[0034] a) Pulverizing process: dry the sorghum stalks and pulverize them until the particle size is below 200 mesh to obtain sorghum stalk biomass particles;

[0035] b) Acid-base treatment process: 100g sorghum stalk biomass particles are placed in 200ml 3wt% phosphoric acid aqueous solution and stirred and soaked for 30min, then placed in 200ml 5wt% potassium hydroxide aqueous solution at 50°C for 10min, filtered and washed with tap water until The filtrate becomes neutral to obtain acid-base modified biomass particles;

[0036]c) Oxidation process: place the acid-base modified biomass particles in an aqueous potassium permanganate solution with a concentration of 5 wt%, and oxidize them at 10-20° C. for 1-2 hours to obtain an oxidized biomass dispersion; the potassium permanganate The dosage is 0.10 times of the weight of sorghum stalk bioma...

Embodiment 2

[0043] The influence of embodiment 2 different drying temperatures on the specific surface area of ​​porous biomass microspheres

[0044] (a) Compared with Example 1, the difference is that the drying temperature in the preparation process of the porous biomass microspheres hybridized with inorganic materials is 20-30°C, and the rest of the preparation process and raw material ratio are exactly the same as in Example 1;

[0045] (b) Compared with Example 1, the difference is that the drying temperature in the preparation process of the porous biomass microspheres hybridized with inorganic materials is 80-90°C, and the rest of the preparation process and raw material ratio are exactly the same as in Example 1.

Embodiment 3

[0047] Porous biomass microspheres hybridized with inorganic materials are used to absorb heavy metals in aqueous solution. The specific method is as follows, respectively prepare Pb 2+ 、Cr 2+ 、Cu 2+ 、Ni 2+ or Zn 2+ The aqueous solution of chloride, the molar concentration is 60mmol / L; Prepare the aqueous solution of aniline and phenol respectively, and the molar concentration is also 60mmol / L in addition; The porous biomass microsphere of the inorganic material hybridization that prepares with embodiment 1 is adsorbent (add 1.0g of adsorbent per liter of aqueous solution), place it in an aqueous solution of heavy metals or organic substances (aniline or phenol) at room temperature 20-30°C, use hydrochloric acid or sodium hydroxide to adjust the pH of the system to a certain range, and then carry out stirring and adsorption for 2 hours , filter, adopt ultraviolet detector to test the concentration in aniline and phenol in the filtrate, adopt atomic absorption to measure the...

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Abstract

The invention belongs to the technical field of biomass, and specifically relates to inorganic-material-hybrid porous biomass microspheres used for treating heavy metal sewage and a preparation methodof the porous biomass microspheres. The inorganic-material-hybrid porous biomass microspheres are made by compounding modified sorghum stems and modified hectorite. The prepared composite material can adsorb heavy metal ions and organic pollutants, such as aniline and phenol, in sewage, and has a phenol adsorption removal rate as high as 99%.

Description

technical field [0001] The invention belongs to the technical field of biomass, and in particular relates to a porous biomass microsphere for heavy metal sewage treatment and a preparation method thereof. Background technique [0002] With the continuous development of the industrial development process, my country's soil has been seriously polluted, among which heavy metal pollution is the main type of soil pollution, and the main pollutant types are chromium (Cd), nickel (Ni), copper (Cu), mercury (Hg ), lead (Pb), etc. At present, the excess points of heavy metals in cultivated land soil in my country are mainly caused by medium and low heavy metal pollution. Therefore, in order to achieve the dual goals of normal agricultural production and soil heavy metal restoration, we usually add modifiers (commonly known as passivators) to the soil to remove heavy metals. Transform into low-soluble, fixed, and low-toxic forms, reduce the accumulation of heavy metals in plants, and a...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/24B01J20/28B01J20/30C02F101/20C02F101/22C02F101/30C02F101/38C02F101/34
CPCB01J20/12B01J20/24B01J20/28021B01J20/3441B01J20/3475B01J2220/46B01J2220/485C02F1/281C02F1/285C02F2101/20C02F2101/22C02F2101/30C02F2101/345C02F2101/38C02F2303/16
Inventor 卢伟王瑞峰孙蓓蓓隋永祥隋华山
Owner NANJING SUHUAN ENVIRONMENTAL INTERCONNECTION TECH CO LTD
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