In-situ formation of CaAl-layered double hydroxides with attapulgite for synergistic remediation of soda saline-alkali soil

Zunqun Zhu

doi:10.1016/j.still.2026.107240

In-situ formation of CaAl-layered double hydroxides with attapulgite for synergistic remediation of soda saline-alkali soil

2026-04-25

0

PRE

AI

Z

Zunqun Zhu

M

Miaomiao Yu

P

Peiyun Gong

J

Jing Zhou

H

Huiting Song *

J

Jun Zhou *

DOI：10.1016/j.still.2026.107240

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Abstract

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• Novel amendment triggers in-situ CaAl-LDH formation, rapidly immobilizing soil alkalinity and carbonate. • Rapidly reduces soil pH by 2.7 units and carbonate by 83%, while cutting exchangeable Na⁺ by 76%. • Soil structure improves significantly, increasing macroaggregates 17-fold and organic matter stability by 33%. • Immediate planting is enabled, boosting pakchoi height 218% and fresh weight 70% in pots.

Keywords:

CaAl-LDH

attapulgite

soda saline-alkali soil

soil remediation

pH reduction

In-situ formation of CaAl-layered double hydroxides with attapulgite for synergistic remediation of soda saline-alkali soil

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