Conversion of Oyster Shell Waste to Amendment for Immobilising Cadmium and Arsenic in Agricultural Soil

被引：32

作者：

Bi, Dongxue ^{[1
,2
]}

Yuan, Guodong ^{[3
]}

Wei, Jing ^{[1
]}

Xiao, Liang ^{[1
]}

Feng, Lirong ^{[1
]}

机构：

[1] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Shandong, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Zhaoqing Univ, Sch Environm & Chem Engn, Guangdong Prov Key Lab Environm Hlth & Land Resou, Zhaoqing 526061, Guangdong, Peoples R China

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2020年 / 105卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Oyster shell waste; Soil remediation; Cadmium; Arsenic; Bioavailability; REMEDIATION; CONTAMINATION; BIOCHAR; IMMOBILIZATION; CONSEQUENCES; ACCUMULATION; REMOVAL; GROWTH; RICE;

D O I：

10.1007/s00128-020-02906-w

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A bulky waste, oyster shell (OS), was calcinated at 400-800 degrees C to produce Ca-rich products (OS400-OS800) to reduce the human health risk of soil cadmium (Cd) and arsenic (As). Thermogravimetric analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET method were used to characterize OS and its calcined products. OS and OS400-OS(700)removed little Cd and As from water, whereas OS(800)removed 1508 mg Cd or 514 mg As per kg of OS(800)from solutions of 1032 mg Cd/L or 257 mg As/L via adsorption and precipitation. Adding OS(800)at a 2% dose to a Cd- and As-contaminated soil lowered its exchangeable Cd from 60% to 27%, and reduced Cd content in the edible part of vegetable Bok Choy from 2.80 to 0.048 mg/kg and As from 1.73 to 0.47 mg/kg. Converting OS to soil amendment has the dual benefits to soil remediation and sustainable oyster aquaculture.

引用

页码：277 / 282

页数：6

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