Novel utilization exploration for the dephosphorization waste of Ca-modified biochar: enhanced removal of heavy metal ions from water

被引：1

作者：

Fu, Weilin ^{[1
,2
]}

Li, Mengmeng ^{[1
,2
]}

Chen, Hongan ^{[1
,3
]}

Qu, Jianhua ^{[4
]}

Zhang, Lisheng ^{[1
,2
]}

Qiu, Shangkai ^{[1
,2
]}

Feng, Menghan ^{[1
,2
]}

Yuan, Mingyao ^{[1
,2
]}

Guo, Changbin ^{[1
,2
]}

Zhou, Jien ^{[1
,2
]}

Du, Zhaolin ^{[1
,3
]}

Wang, Feng ^{[1
,2
]}

机构：

[1] Minist Agr & Rural Affairs, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China

[2] Minist Agr & Rural Affairs Dali Original Seed Farm, Monitoring Inst, Dali Comprehens Expt Stn Environm Protect Res, Dali 671004, Peoples R China

[3] Minist Agr & Rural Affairs, Xiangtan Expt Stn Agroenvironm Protect Inst, Xiangtan 411199, Hunan, Peoples R China

[4] Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China

来源：

BIOCHAR | 2024年 / 6卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ca-modified biochar; Dephosphorization; Waste recovery; Heavy metal removal; Density functional theory calculation;

D O I：

10.1007/s42773-024-00373-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Phosphorus-modified biochar has been proven to enhance the precipitation and complexation of heavy metal ions from wastewater. However, the current modification methods require large amounts of exogenous P and have high energy consumption. Hence, this study proposes and analyzes a strategy integrating biochar production, phosphorus wastewater treatment, dephosphorization waste recovery, and heavy metal removal. "BC-Ca-P" was derived from Ca-modified biochar after phosphorus wastewater treatment. The adsorption of Pb(II) by BC-Ca-P followed the Langmuir isotherm and pseudo-second-order kinetic models. The maximum adsorption capability of 361.20 mg<middle dot>g-1 at pH 5.0 for 2 h was markedly greater than that of external phosphorous-modified biochar. The adsorption mechanisms were dominated by chemical precipitation and complexation. Furthermore, density functional theory calculations indicated that oxygen-containing functional groups (P-O and C-O) contributed the most to the efficient adsorption of Pb(II) onto BC-Ca-P. To explore its practical feasibility, the adsorption performance of BC-Ca-P recovered from an actual environment was evaluated. The continuous-flow adsorption behavior was investigated and well-fitted utilizing the Thomas and Yoon-Nelson models. There was a negligible P leakage risk of BC-Ca-P during heavy metal treatment. This study describes a novel and sustainable method to utilize dephosphorization waste for heavy metal removal. Dephosphorization biochar waste was used to sustainably remove heavy metals from wastewater.Field-recovered dephosphorization biochar waste displayed high Pb adsorption capacity.Dephosphorization biochar for heavy metal removal is an eco-friendly waste-reduction and resource-utilization method.

引用

页数：16