Article
Chemistry, Analytical
Jian Tang, Hengjun Tang, Haiyue Wang, Weiping Sima, Rui Liang, Yi Liao, Chao Liang
Summary: A novel method using biodegradable chelating ligand iminodisuccinic acid and electrolyte circulation technology was proposed to enhance electrokinetic remediation for removing heavy metals from sludge. The results demonstrated that this method effectively removed toxic metals from sludge and increased the extraction efficiency.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Zhanbiao Yang, Dan Wang, Guiyin Wang, Shirong Zhang, Zhang Cheng, Junren Xian, Yulin Pu, Ting Li, Yongxia Jia, Yun Li, Wei Zhou, Xiaoxun Xu
Summary: This study introduced a new chemical washing strategy using two organic acid polymers to remove heavy metals from industrial sludge. Factors such as agent concentration, solid-to-liquid ratio, washing time, and pH value were found to significantly affect the removal efficiency of heavy metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Jianlong Hu, Jixu Zhao, Xi Zheng, Simeng Li, Qi Lv, Cunzhen Liang
Summary: Heavy metals are a major obstacle to the use of sewage sludge in land applications. Traditional chelators have drawbacks of low biodegradability. This study found that MGDA, a biodegradable chelator, is a potential environmentally friendly alternative for removing heavy metals from sludge, reducing the risk of secondary pollution.
Article
Engineering, Environmental
Qiuzi Zhu, Jianzhong Zhu, Meng Su, Liang Liu, Cunshi Wang, Dongliang Ji, Wangjun Bai, Wentao Shen
Summary: An eco-friendly biodegradable adsorbent, IDS-ATP, was developed to reduce Cu(II) in water. IDS-ATP exhibited significantly higher adsorption capacity for Cu(II) compared with raw ATP and non-degradable chelator EDTA-ATP. The adsorption mechanism involved the coordination of amino groups, chelation of -COOH, and ion exchange. This degradable material could potentially be used to reduce other heavy metals in water.
ENVIRONMENTAL ENGINEERING RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Zebin Wei, Yihui Chen, Xiaoqing Li, Haiyu Rong, Zhujian Huang
Summary: In this study, the effects of biodegradable chelating GLDA on heavy metal-contaminated farmland soil were investigated using the method of leaching. The results showed that adjusting the acidity of the GLDA solution by adding citric acid improved the leaching efficiency of heavy metal Pb in soil. The synergistic effect between GLDA and citric acid was also observed. The study provides a low ecological risk method for the remediation of heavy metal-contaminated soils.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Richard Nasilele Mutafela, Fei Ye, Yahya Jani, Joydeep Dutta, William Hogland
Summary: This study investigates the extraction of hazardous metals from mechanically activated glass waste using biodegradable chelating agents. The results show that the type and concentration of chelator have a greater influence on the extraction than the reaction time. The study provides a sustainable alternative for treating hazardous glass waste.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2022)
Article
Environmental Sciences
Juanjuan Zhao, Feng Deng, Han Zhang, Wenwen Gu, Huidan Chen, Siqi Huang
Summary: This paper studies the redistribution law of heavy metals in the process of sludge disintegration to address the problems of excess sludge output, difficulty in treatment and disposal, and potential toxicity of heavy metals limiting resource utilization. The dissertation investigates the distribution law of Cu, Pb, Cd, Zn in the process of microwave and citric acid-microwave cracking sludge under different specific energy conditions. The findings show that the dissolution rate of heavy metals increased rapidly during the citric acid-microwave cracking process, and the concentrations and stability of heavy metals in the sludge were affected by specific energy and treatment methods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agriculture, Multidisciplinary
Vasiliy Brusko, Bulat Garifullin, Gulnaz Geniyatullina, Polina Kuryntseva, Gulnaz Galieva, Polina Galitskaya, Svetlana Selivanovskaya, Ayrat M. Dimiev
Summary: Serious concerns about the negative impact of ethylenediaminetetraacetic acid (EDTA) on the environment have led to severe restrictions on its use. This study proposes a biodegradable chelating agent, IGSA, as an environmentally friendly alternative for microelement fertilizers. The IGSA-based fertilizer outperforms EDTA-based and IDS-based fertilizers in terms of lettuce biomass and mineral uptake.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Engineering, Environmental
Lorien Luyckx, Jo Van Caneghem
Summary: This study investigates the influence of adding chemicals to sewage sludge prior to incineration on the ash mineralogy and the extraction of phosphorus (P) and heavy metals. Results show that adding chemicals changes the P mineralogy, but has little effect on P extraction efficiency. However, it significantly affects the extraction of heavy metals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lorien Luyckx, Jo Van Caneghem
Summary: The study found that the efficiency of phosphorus extraction from sewage sludge ash varied with different incineration temperatures, while for acidic extraction liquids, the optimal P extraction efficiency was found in samples obtained around 850 degrees Celsius. Co-extraction of heavy metals generally decreased with increasing incineration temperature, possibly due to the immobilization of heavy metals in the SSA matrix.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Abdullah Taner Bisgin
Summary: A novel separation and preconcentration approach based on hydrophobic immiscible chelating fluid (HICF) and automated syringe discharge system was established for simultaneous chelation and micro-extraction of Cd2+. The method was optimized and validated with satisfactory recovery values.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Hongdi Yu, Jiantao Li, Fawei Lin, Menglan Zeng, Rundong Li, Beibei Yan, Guanyi Chen
Summary: Pyrolysis of oily sludge is commonly used for its efficient removal and recovery of petroleum hydrocarbons. However, little research focuses on evaluating the solid products from this process. This study found that the fly ash and pyrolysis residue still contain trace amounts of petroleum hydrocarbons, and the combustion of the solid samples was more effective than pyrolysis. These findings suggest that the solid products have potential for combustion utilization.
Article
Engineering, Environmental
Shaogang Hu, Jingping Hu, Yingfei Sun, Qian Zhu, Longsheng Wu, Bingchuan Liu, Keke Xiao, Sha Liang, Jiakuan Yang, Huijie Hou
Summary: The hybrid sludge conditioning strategy utilizing electrooxidation and Fe(II) addition proved effective in removing heavy metals from sewage sludge and industrial sludge, while also achieving sludge dewatering and stabilization. The process resulted in significant heavy metal removal rates along with pH decrease, ORP increase, and excellent dewatering performance, as well as pathogen inactivation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Yaling Leng, Minying Lu, Feili Li, Boxuan Yang, Zhong-Ting Hu
Summary: Sludge landscaping after compost stabilization is a popular recycling process, but until trace elements (TEs) are extracted and reduced to safe concentrations by plants, there is a potential exposure risk. In this study, three garden plants were selected for experiments to study their ability to phytoremediate TEs, with Liriope platyphylla showing the highest biomass and uptake of TEs, especially when treated with citric acid (CA). The results suggest the potential usefulness of L. platyphylla for phytoremediation and provide basic data and technical support for the use of sludge-based compost and phytoremediation by garden plants.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Guangyu Duan, Xintong Li, Xin Ma, Wei Zhong, Shuai Wang
Summary: A novel PAPDA resin was developed for the effective removal of Cu2+ and Ni2+ from heavy metal wastewater. The resin exhibited high adsorption capacities and affinity towards Cu2+ and Ni2+ ions. The results showed that PAPDA resin is a promising and environmentally friendly adsorbent for the treatment of heavy metals-containing wastewater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
