Removal of humic acid from a sloped water body using polyethyleneimime-modified CuS-activated persulfate

LV Jianbing; SHAO Ying; CHEN Jiahao; FAN Qinglu; YAO Dayou; LIN Jinjun

doi:10.11949/0438-1157.20260086

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Removal of humic acid from a sloped water body using polyethyleneimime-modified CuS-activated persulfate

更新时间：2026-04-29

- Removal of humic acid from a sloped water body using polyethyleneimime-modified CuS-activated persulfate
- CIESC Journal (2026)
- 作者机构：
  
  1.广东工业大学土木与交通工程学院，广东广州 510006
  2.新疆农垦科学院，新疆石河子832000
  3.中建三局集团（深圳）有限公司，广东深圳518110
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260086
  CLC： X 703.1
- Received：19 January 2026，
  
  Revised：2026-04-26，
  
  Accepted：27 April 2026，
- 稿件说明：
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LV Jianbing, SHAO Ying, CHEN Jiahao, et al. Removal of humic acid from a sloped water body using polyethyleneimime-modified CuS-activated persulfate[J/OL]. CIESC Journal, 2026.
DOI：

LV Jianbing, SHAO Ying, CHEN Jiahao, et al. Removal of humic acid from a sloped water body using polyethyleneimime-modified CuS-activated persulfate[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260086.

摘要

边坡或隧道水体中腐殖酸（HA）易产生生物淤堵

也会危害水质安全，需要研发一种新型高效腐殖酸净化技术，基于硫酸根自由基的高级氧化技术是高效去除手段。本研究采用一步原位合成法制备聚乙烯亚胺（PEI）改性硫化铜（CuS@PEI），用于活化过二硫酸盐（PDS）降解HA。结果表明，PEI的引入未改变CuS晶体结构，但通过空间位阻抑制团聚，形成分散性良好的纳米球，且胺基可促进Cu

/Cu

价态循环并减少铜离子浸出。在HA浓度为20mg/L，CuS@PEI浓度为0.2g/L，PDS浓度为3mmol/L，pH值为3~9条件下，60min内HA去除率达88%以上，显著高于未改性CuS体系（52.68%），且具有将HA进一步矿化的潜力。该体系对Cl

、SO

和NO

等常见阴离子表现出优异的抗干扰能力，而HCO

则对HA降解具有抑制作用。CuS@PEI/PDS体系中活性氧包括SO

·、·OH、O

、

，其中O

、

起主导作用，且存在电子转移路径协同降解HA。HA在活性氧的作用下经历芳香族中间体的生成、开环反应、C–C键断裂及最终矿化过程。CuS@PEI循环5次后去除率仍达81.66%，且铜离子浸出量显著降低，该材料为高效去除边坡水体HA提供了新思路。

Abstract

Biological clogging with humic acid (HA) in sloped or tunnel water bodies can degrade water quality

necessitating an innovative and efficient HA purification technology. The sulfate-radical-based advanced oxidation process has been regarded as an effective HA-removal strategy. In this study

polyethyleneimine (PEI)-modified copper sulfide (CuS@PEI) was prepared via a one-step in situ synthesis method and used as a peroxydisulfate (PDS) activator for HA degradation. Results revealed that PEI introduction did not alter the crystal structure of CuS but exerted a steric-hindrance effect that suppressed particle agglomeration and promoted the formation of well-dispersed nanospheres. Moreover

/Cu

cycling was promoted by the amine groups in PEI

which decreased the leaching of copper ions. In the reaction system with HA

CuS@PEI

and PDS concentrations of 20 mg/L

0.2 g/L

and 3 mmol/L

respectively

and pH values of 3-9

the HA-removal rate far exceeded that of the unmodified CuS system within 60 minutes (

88% vs.52.68%)

and the potential mineralization of HA can be further facilitated.The system exhibits excellent resistance to int

erference from common anions such as Cl

、SO

and NO

while HCO

shows an inhibitory effect on HA degradation. Among active oxygen species generated in the CuS@PEI/PDS system (such as SO

·OH

and

)

and

played the dominant role

and synergistic HA degradation was promoted by an electron transfer pathway. HA undergoes the formation of aromatic intermediates

ring-opening reactions

C–C bond cleavage

and ultimately mineralization under the action of reactive oxygen species. After five cycles

CuS@PEI retained a removal rate of 81.66% and copper-ion leaching was significantly reduced compared to the CuS system. Therefore

the as-prepared material can realize the efficient removal of HA from sloped water bodies.

关键词

Keywords

references

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