[1]鹿晓菲,王晓瑜,梁明贺,等.硅酸盐协同微生物诱导方解石沉淀去除水中镉[J].中国给水排水,2026,42(1):71-77.
　LUXiaofei,WANGXiaoyu,LIANGMinghe,et al.Cadmium Removal from Water Using Silicate-synergized Microbial?induced Calcite Precipitation[J].China Water & Wastewater,2026,42(1):71-77.
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硅酸盐协同微生物诱导方解石沉淀去除水中镉

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第1期 页码: 71-77 栏目: 出版日期: 2026-01-01
Title:
Cadmium Removal from Water Using Silicate-synergized Microbial?induced Calcite Precipitation
作者:
鹿晓菲1， 王晓瑜1,2， 梁明贺1， 郭慧宇1， 由昆1， 冯思婷1,3
（1.沈阳建筑大学 市政与环境工程学院，辽宁 沈阳 110168；2.中国石油化工股份有限公司 沧州分公司，河北 沧州 061000；3.中国科学院 生态环境研究中心，北京 100085）
Author(s):
LU　Xiaofei1， WANG　Xiaoyu1，2， LIANG　Minghe1， GUO　Huiyu1， YOU　Kun1， FENG　Siting1，3
（1. School of Municipal and Environmental Engineering， Shenyang Jianzhu University， Shenyang 110168， China； 2. Cangzhou Branch， China Petroleum & Chemical Corporation ， Cangzhou 061000， China； 3. Research Center for Eco-Environmental Sciences， Chinese Academy of Sciences， Beijing 100085， China）
关键词:
硅酸盐;  微生物诱导方解石沉淀;  生物矿化;  重金属
Keywords:
silicate;  microbial-induced calcite precipitation;  biomineralization;  heavy metal
摘要:
作为一种新兴的重金属污染生物治理技术，以微生物诱导方解石沉淀（MICP）为代表的生物矿化技术受到了广泛关注。为了进一步提升MICP对重金属的去除效果，建立了硅酸盐协同MICP技术体系，并以水体中Cd（Ⅱ）的去除效果为评价对象，分析了硅酸盐协同MICP体系矿化固定Cd（Ⅱ）的作用机制。结果表明，高产脲酶的Cd（Ⅱ）耐受型复合菌株FH1可实现MICP作用去除水中重金属镉。硅酸盐的协同能显著提升MICP过程的除镉效果，协同体系对Cd（Ⅱ）的固定量显著升高至98.3 mg/g，比MICP组高54.3%；当硅酸盐投加量为0.75 mol/L且在MICP反应初始加入时，除镉率可在36 h内达到99.5%。协同体系矿化Cd（Ⅱ）产生的沉淀物主要成分仍为方解石，但硅酸盐的加入使得沉淀物的形态更加复杂。协同体系对Cd（Ⅱ）的固定机制包括在硅酸盐途径下交换并固定部分Cd（Ⅱ），以及MICP途径下方解石的钙位代替和分子间隙包裹，通过晶胞聚集形成含镉生物方解石矿化物，进而实现对水中Cd（Ⅱ）的吸附、包裹和固定。
Abstract:
Microbial?induced calcite precipitation (MICP) biomineralization technology has garnered significant attention as an emerging method for heavy metal bioremediation. To enhance MICP’s efficacy in heavy metal removal, a silicate-synergized MICP system was developed to evaluate Cd(Ⅱ) removal efficiency in aqueous environments and to elucidate the mechanisms underlying Cd(Ⅱ) mineralization and immobilization. The results showed that the Cd (Ⅱ) tolerant composite strain FH1 with high urease production could achieve MICP action to remove heavy metal cadmium from water. The incorporation of silicate significantly improved Cd(Ⅱ) removal efficiency, with the adsorption capacity increasing to 98.3 mg/g, a 54.3% enhancement compared to the MICP-only group. At a silicate dosage of 0.75 mol/L introduced at the initial MICP reaction stage, the Cd(Ⅱ) removal rate reached 99.5% within 36 hours. Silicate addition resulted in more complex precipitate morphologies, with calcite remaining the primary component of the Cd(Ⅱ)-mineralized product. The Cd(Ⅱ) immobilization mechanism involves the exchange and immobilization of Cd(Ⅱ) through silicate pathways, as well as the substitution of calcium sites in calcite and the encapsulation of Cd(Ⅱ) within bio-calcite mineralization, facilitated by crystal cell aggregation, thereby achieving adsorption, encapsulation, and fixation of Cd (Ⅱ) in water.
更新日期/Last Update: 2026-01-01