Simultaneous inhibition of nitrogen and phosphorus released from sediments using composite materials prepared from water purfication sludge and zeolite

XU Jinlan; HE Chen; BAI Wenguang; RONG Yuetong; LIU Lu; XU Kaihui; LI Fengsen; LIU Hongwei

doi:10.13205/j.hjgc.202507004

Volume 43 Issue 7

Jul. 2025

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XU Jinlan, HE Chen, BAI Wenguang, RONG Yuetong, LIU Lu, XU Kaihui, LI Fengsen, LIU Hongwei. Simultaneous inhibition of nitrogen and phosphorus released from sediments using composite materials prepared from water purfication sludge and zeolite[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 27-37. doi: 10.13205/j.hjgc.202507004

Citation:

XU Jinlan, HE Chen, BAI Wenguang, RONG Yuetong, LIU Lu, XU Kaihui, LI Fengsen, LIU Hongwei. Simultaneous inhibition of nitrogen and phosphorus released from sediments using composite materials prepared from water purfication sludge and zeolite[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 27-37. doi: 10.13205/j.hjgc.202507004

Citation:

XU Jinlan, HE Chen, BAI Wenguang, RONG Yuetong, LIU Lu, XU Kaihui, LI Fengsen, LIU Hongwei. Simultaneous inhibition of nitrogen and phosphorus released from sediments using composite materials prepared from water purfication sludge and zeolite[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(7): 27-37. doi: 10.13205/j.hjgc.202507004

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Simultaneous inhibition of nitrogen and phosphorus released from sediments using composite materials prepared from water purfication sludge and zeolite

doi: 10.13205/j.hjgc.202507004

XU Jinlan^{1,2
,
,},
HE Chen^1,2,
BAI Wenguang^1,2,
RONG Yuetong^1,2,
LIU Lu^1,2,
XU Kaihui^1,2,
LI Fengsen^1,2,
LIU Hongwei^1,2,3

1. College of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Key Laboratory of Environmental Engineering, Shaanxi Province, Xi'an 710055, China;
3. Zhongsheng Environmental Technology Development Co., Xi'an 710076, China

Received Date: 2024-10-19
Accepted Date: 2024-12-05
Rev Recd Date: 2024-11-20

Available Online: 2025-09-11

Abstract

Abstract

In response to nutrient and organic matter release from sediments into overlying water， which leads to eutrophication， an in-situ capping technology was proposed to mitigate pollution released from sediments in an experiment. The response surface method was used to optimize the modification method of zeolite， and a one-way experiment was conducted to determine the optimal calcination time and temperature for water purification plant sludge. The composite cover material（CCM） was prepared by calcining water purification sludge and composite-modified zeolite， preparing CaO₂ from eggshell， and mixing them with cement as a binder for long-lasting oxygen release and simultaneous efficient removal of nitrogen and phosphorus. It was found that the CCM was loose and porous， with abundant oxygen-containing functional groups that enhanced its adsorption capability and capacity. The presence of Ca²⁺， Al³⁺， and Na⁺ promoted the ion exchange with NH₄⁺ and the immobilization of phosphate. Additionally， the CCM could induce microbial growth， strengthen the nitrification reaction， and remove the TOC from the water body. After three rounds of capping experiments， total nitrogen， ammonia， total phosphorus， orthophosphate， and TOC were simultaneously and efficiently removed， achieving a removal rate of 81.75%， 79.55%， 86.64%， 85.82%， and 29.16%， respectively. CCM， as an environmentally friendly material with a long service life， promotes the growth of ecosystem-originating microorganisms while enabling the synchronous removal of nitrogen， phosphorus， and organic matter， thus efficiently restoring the ecological vitality of the water.
- waste utilization,
- nitrogen and phosphorus removal,
- response surface,
- biological induction

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References(33)

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