Research Progress in the Adsorption and Immobilization of Cd(Ⅱ)/Pb(Ⅱ)in the Environment Using Modified Biochar
The study summarizes the use of adsorption methods for remediating combined Cd(Ⅱ)/Pb(Ⅱ)pollution in the environment.Environmentally friendly and cost-effective biochar is widely applied as an adsorbent,but it has limitations such as finite adsorption constants and poor selectivity.Therefore,modification is commonly em-ployed to enhance its adsorption and fixation efficiency.This paper comprehensively analyzes the influencing fac-tors of modified biochar on the adsorption and fixation of cadmium and lead,including biochar raw materials,modification methods,types and concentrations of modifiers,pyrolysis temperature,competition between Cd(Ⅱ)and Pb(Ⅱ),dosage,pH,interfering ions,and the mechanism of modified biochar adsorption and fixation of heavy metals.Finally,it emphasizes the enhancement of adsorption capacity by adjusting biochar properties through con-trol of conditions.The outlook underscores the need for further research on modification methods and the long-term stability of biochar in complex pollution environments to achieve more effective heavy metal remediation.
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