Fig. 1

Absorbance changes of ARLD-n against pH a LDH colloidal suspension (1.0 g L⁻¹) in deionized water in different adjusted pH (pH of ARS solution was fixed at 7 in LbL cycles), b ARS solution (1.0 g L⁻¹) in deionized water in different adjusted pH (pH of LDH suspension was fixed at 5.5 in LbL cycles), c absorbance changes of ARLD-5 (pH of LDH suspension was fixed at 5.5 and pH of ARS solution was fixed at 4.0 through LbL cycles)