Title:
METHOD FOR TREATING HEAVY METAL LEACHING WASTEWATER BY USING MULTI-WALLED CARBON NANOTUBE CROSS-LINKED NATURAL LATEX ADSORBENT
Document Type and Number:
WIPO Patent Application WO/2023/077631
Kind Code:
A1
Abstract:
A method for treating heavy metal leaching wastewater by using a multi-walled carbon nanotube cross-linked natural latex adsorbent, specifically comprising the following steps: preparation for leaching wastewater, precipitation of the leaching wastewater, preparation for a multi-walled carbon nanotube cross-linked natural latex adsorbent, adsorption treatment for the leaching wastewater, complex breaking treatment for the leaching wastewater, pH adjustment, addition of precipitate, addition of a flocculant, and precipitation separation. The leaching wastewater is obtained by using a composite leaching solution prepared from 5-50 mmol/L of chloride and 20-150 mmol/L of an organic acid to realize leaching of soil contaminated by high-concentration heavy metal such as lead and cadmium. The technical effect of wastewater treatment and precipitation is obvious, the efficiency is high, the operation is simple, the cost is relatively low, the practicability is high, the removal rates of lead and cadmium in the leaching wastewater can reach 99.94% and 99.86%, respectively, the treated wastewater can be recycled by means of pH value adjustment, and moreover, the water quality is purified, and the risk of water body pollution is reduced.
Inventors:
DING JIAMIN (CN)
LU SHENGYONG (CN)
LI JIANHUA (CN)
ZHU HUIPING (CN)
GUO XUANHAO (CN)
LU SHENGYONG (CN)
LI JIANHUA (CN)
ZHU HUIPING (CN)
GUO XUANHAO (CN)
Application Number:
PCT/CN2021/139583
Publication Date:
May 11, 2023
Filing Date:
December 20, 2021
Export Citation:
Assignee:
ZHEJIANG RES INST UNIV TAIZHOU (CN)
International Classes:
B01J20/24; B01J20/30; C02F1/28
Foreign References:
| CN105537254A | 2016-05-04 | |||
| CN105668856A | 2016-06-15 | |||
| CN110305375A | 2019-10-08 | |||
| CN107175065A | 2017-09-19 | |||
| CN111135792A | 2020-05-12 | |||
| JP2001276845A | 2001-10-09 |
Other References:
CAIZI XIONG, LI DUOSHENG, YE YIN, LIN KUIXIN: "Progress in Synthesis and Adsorption Properties of Three-dimensional Reticulated Graphene", JOURNAL OF FUNCTIONAL MATERIALS, GAI-KAN BIANJIBU , CHONGQING, CN, vol. 51, no. 8, 31 August 2020 (2020-08-31), CN , pages 08068 - 08069, XP093063563, ISSN: 1001-9731
Attorney, Agent or Firm:
NINGBO YONGSUN PATENT LAW OFFICE (CN)
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