Synthesis of MgO-coated corncob biochar and its application in lead stabilization in a soil washing residue

Shen, Zhengtao; Zhang, Jingzhuo; Hou, Deyi; Tsang, Daniel C.W.; Ok, Yong Sik; Alessi, Daniel S.

doi:10.1016/j.envint.2018.11.045

Cited by 187 publications

(47 citation statements)

References 40 publications

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“…Cd can readily cause damage to the internal organs and systems of the human body, and is the most toxic transition metal element that poses global human health risks [3]. In 2014, the fraction of points that exceeded the standard quantity of Cd in cultivated land in China was 7% [4], and the area of farmland polluted by Cd reached 20 million hectares, which was mainly caused by irrigation due to industrial wastewater [5]. With the improvement in food safety standards and environmental awareness of the public, the prevention of Cd contamination of the food chain has become a common concern [6].…”

Section: Introductionmentioning

confidence: 99%

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Zhu

Liang

et al. 2020

Water

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Removal of aquatic cadmium ions using biochar is a low-cost method, but the results are usually not satisfactory. Modified biochar, which can be a low-cost and efficient material, is urgently required for Cd-polluted water and soil remediation. Herein, poplar bark (SB) and poplar sawdust (MB) were used as raw materials to prepare modified biochar, which is rich in N- and S- containing groups, i.e., TSBC-600 and TMBC-600, using a co-pyrolysis method with thiourea. The adsorption characteristics of Cd2+ in simulated wastewater were explored. The results indicated that the modification optimized the surface structure of biochar, Cd2+ adsorption process by both TSBC-600 and TMBC-600 was mainly influenced by the initial pH, biochar dosage, and contact time, sthe TSBC-600 showed a higher adsorption capacity compared to TMBC-600 under different conditions. The Langmuir adsorption isotherm model and pseudo-second-order kinetic model were more consistent with the adsorption behavior of TSBC-600 and TMBC-600 to Cd2+, the maximum adsorption capacity of TSBC-600 and TMBC-600 calculated by the Langmuir adsorption isotherm model was 19.998 mg/g and 9.631 mg/g, respectively. The modification method for introducing N and S into biochar by the co-pyrolysis of biomass and thiourea enhanced the removal rate of aquatic cadmium ions by biochar.

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Section: Introductionmentioning

confidence: 99%

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Zhu

Liang

et al. 2020

Water

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“…The weak peak at 2918 cm −1 is attributable to the stretching of C-H bonds of aliphatic compounds. The peak intensity at wave numbers 1611 cm −1 and 1377 cm −1 corresponds to the stretching of C=C and C=O bonds in aromatic ring (Shen et al 2019;Zhang et al 2018a). The peak intensity at wave numbers of 1062 cm −1 , 795 cm −1 , and 472 cm −1 results from the vibration absorption of Si-O-Si (Shi et al 2019).…”

Section: Characterization Of Biocharmentioning

confidence: 98%

Rapid aerobic granulation using biochar for the treatment of petroleum refinery wastewater

et al. 2020

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Aerobic granular sludge technology has great potential for the treatment of petroleum refinery wastewater. However, strategies to shorten the granulation time and improvement the stability still need to be developed. In this work, biochar was prepared from waste petroleum activated sludge (biochar-WPS) and used in a sequencing batch reactor for the treatment of petroleum refinery wastewater. Biochar-WPS presented the surface area of 229.77 m2/g, pore volume of 0.28 cm3/g, H/C and O/C atomic ratios of 0.42 and 0.21, respectively. The porous structure and a high degree of hydrophilicity were found to facilitate microbial colonization and adhesion as well as particle aggregation. Application of biochar-WPS resulted in the formation of more substantial and stable aerobic granules (~ 66% of granules > 0.46 mm diameter) 15 days earlier compared with the control. The addition of biochar-WPS enhanced the average removal efficiency of chemical organic demand (~ 3%), oil (~ 4%) and total nitrogen (~ 10%) over the control. Increased microbial richness and diversity were observed within the formed granules and had an increased (~ 4%) proportion of denitrifying bacteria. These results indicate that an aerobic granulation mechanism using biochar-WPS is a feasible option for the treatment of petroleum refinery wastewater.

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“…BC is playing a significant role as catalyst in various fields, the list of which is continuously increasing. [5,6,50] The additional efforts done to study the activation and functionalization of this carbonaceous material have revealed its chemical stability and possibility of modified structural properties, which make it an appropriate catalyst/catalyst support. [7,10] Depending upon the usage of BC, its surface chemistry can be altered to act as catalyst/catalyst support for biomass hydrolysis, bio-oil upgrading, catalytic esterification, bio-syngas reforming, and biodiesel production.…”

Section: Application Of Bc Catalyst In Biorefinerymentioning

confidence: 99%

“…[2][3][4] In comparison with other carbonaceous materials synthesized by complicated and energy-consuming processes, BC is a greener carbonaceous material derived from waste biomass by cost-effective synthesis processes and thus reduces environmental impacts. [5][6][7] The applications of as-synthesized BCs are closely related to their physicochemical characteristics. [8] To improve the physicochemical characteristics of the as-synthesized BCs, various activation and functionalization methods have been studied so far.…”

Section: Introductionmentioning

confidence: 99%