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Jia Zhu
School of Construction and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China

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Journal article
Published: 21 August 2021 in Sustainability
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Heavy metal pollution in mine wastelands is quite severe. Iris sibirica L., an emergent wetland plant, is characterized by an ability to survive under high stress of heavy metals. This study aimed to explore the phytoremediation ability of nickel (Ni), cobalt (Co), and lead (Pb) by Iris sibirica L. under hydroponic conditions. A series of tests were conducted at different metal stress conditions to evaluate the phytoextraction and tolerance of Iris sibirica L. The concentrations of Ni, Co, and Pb in plant shoots reached their highest values in 500 mg L−1 treatments, where they were 6.55%, 23.64%, and 79.24% higher than those in 300 mg L−1, respectively. The same concentrations in roots also reached their peak in 500 mg L−1 treatments, where they were 5.52%, 33.02%, and 70.15% higher than those in 300 mg L−1, respectively. Bioconcentration factors (BCF) for Ni, Co, and Pb revealed the phytoextraction ability of Iris sibirica L., and the translocation factors (TCF) showed that Ni may be most easily translocated in the plant, followed by Co and Pb. This study indicates that, compared with Ni and Co, Iris sibirica L. is more suitable for the phytoremediation of Pb-contaminated metal mine wastelands.

ACS Style

Shuming Wan; Jun Pang; Yiwei Li; Yanping Li; Jia Zhu; Jinsheng Wang; Ming Chang; Lei Wang. Hydroponic Phytoremediation of Ni, Co, and Pb by Iris Sibirica L. Sustainability 2021, 13, 9400 .

AMA Style

Shuming Wan, Jun Pang, Yiwei Li, Yanping Li, Jia Zhu, Jinsheng Wang, Ming Chang, Lei Wang. Hydroponic Phytoremediation of Ni, Co, and Pb by Iris Sibirica L. Sustainability. 2021; 13 (16):9400.

Chicago/Turabian Style

Shuming Wan; Jun Pang; Yiwei Li; Yanping Li; Jia Zhu; Jinsheng Wang; Ming Chang; Lei Wang. 2021. "Hydroponic Phytoremediation of Ni, Co, and Pb by Iris Sibirica L." Sustainability 13, no. 16: 9400.

Journal article
Published: 19 August 2021 in Sustainability
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Biochars produced from aquatic plants have attracted increasing attention for the removal of heavy metals from the environment. Therefore, biochars derived from the roots (CBR), stems (CBS) and leaves (CBL) of cattail were investigated in this paper for their higher adsorption capacity, particularly for Cd(II). The adsorption characteristics and the leaching of alkali (soil) metals within biochars obtained from the different tissues of cattail were also discussed. The results showed that the specific surface area of cattail root biochar reached 15.758 m2 g−1. Langmuir, Freundlich and D-R isotherm equations were used to fit the experimental data, and the last equation revealed the best fitting result. The adsorption kinetics for Cd(II) removal were determined by using two different models. The experimental data for CBR and CBS were in good agreement with the pseudo second-order model, whereas the pseudo first-order model provided a better fit for CBL. The amount of leached K reached 73.214 mg g−1 in CBS (55.087 mg g−1 in CBL), which was almost an order of magnitude higher than those of Mg and Ca. The experimental data showed that the leached Mg and Ca metals in CBL had maximum levels of 6.543 and 10.339 mg g−1, respectively. The mechanism of Cd(II) sorption by the biochar is complex and probably involves a combination of mass transfer, ion exchange, and mineral precipitation through the macropores and micropores of the biochar in the sorption process.

ACS Style

Xiaoshu Wang; Zheng Yan; Lingchao Song; Yangyang Wang; Jia Zhu; Nan Xu; Jinsheng Wang; Ming Chang; Lei Wang. Preparation and Characterization of Cattail-Derived Biochar and Its Application for Cadmium Removal. Sustainability 2021, 13, 9307 .

AMA Style

Xiaoshu Wang, Zheng Yan, Lingchao Song, Yangyang Wang, Jia Zhu, Nan Xu, Jinsheng Wang, Ming Chang, Lei Wang. Preparation and Characterization of Cattail-Derived Biochar and Its Application for Cadmium Removal. Sustainability. 2021; 13 (16):9307.

Chicago/Turabian Style

Xiaoshu Wang; Zheng Yan; Lingchao Song; Yangyang Wang; Jia Zhu; Nan Xu; Jinsheng Wang; Ming Chang; Lei Wang. 2021. "Preparation and Characterization of Cattail-Derived Biochar and Its Application for Cadmium Removal." Sustainability 13, no. 16: 9307.

Journal article
Published: 28 May 2021 in Processes
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In order to investigate the tolerance of an anoxic-oxic (A/O) process for the changing of refractory organics in electroplating wastewater, optimize the technological parameters, and reveal the microbial characteristics, a pilot-scale A/O process was carried out and the microbial community composition was analyzed by high-throughput sequencing. The results indicated that a better tolerance was achieved for sodium dodecyl benzene sulfonate, and the removal efficiencies of organic matter, ammonia nitrogen (NH4+-N), and total nitrogen (TN) were 82.87%, 66.47%, and 53.28% with the optimum hydraulic retention time (HRT), internal circulation and dissolved oxygen (DO) was 12 h, 200% and 2–3 mg/L, respectively. Additionally, high-throughput sequencing results demonstrated that Proteobacteria and Bacteroidetes were the dominant bacteria phylum, and the diversity of the microbial community in the stable-state period was richer than that in the start-up period.

ACS Style

Jingsi Gao; Chongsen Duan; Xiao Huang; Jianghua Yu; Zhen Cao; Jia Zhu. The Tolerance of Anoxic-Oxic (A/O) Process for the Changing of Refractory Organics in Electroplating Wastewater: Performance, Optimization and Microbial Characteristics. Processes 2021, 9, 962 .

AMA Style

Jingsi Gao, Chongsen Duan, Xiao Huang, Jianghua Yu, Zhen Cao, Jia Zhu. The Tolerance of Anoxic-Oxic (A/O) Process for the Changing of Refractory Organics in Electroplating Wastewater: Performance, Optimization and Microbial Characteristics. Processes. 2021; 9 (6):962.

Chicago/Turabian Style

Jingsi Gao; Chongsen Duan; Xiao Huang; Jianghua Yu; Zhen Cao; Jia Zhu. 2021. "The Tolerance of Anoxic-Oxic (A/O) Process for the Changing of Refractory Organics in Electroplating Wastewater: Performance, Optimization and Microbial Characteristics." Processes 9, no. 6: 962.

Journal article
Published: 05 March 2020 in Chemosphere
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In order to improve the catalytic activity and recycling performance of heterogeneous Fenton catalyst, a heterogeneous Fenton catalyst Fe/TiO2 based on TiO2 supported visible light response was prepared by a simple method using TiO2 synthesized by sol-gel method as carrier and ferric nitrate as Fe source. It was characterized by SEM, EDX, XRD, UV–vis instruments. The influencing factors of catalytic degradation of atrazine by visible light heterogeneous Fenton of Fe/TiO2 were studied and the reaction kinetics were fitted. The mineralization degree of atrazine was reflected by the removal rate of TOC. The intermediate products by the degradation of the catalytic system was analyzed and the reaction mechanism of Fe/TiO2–H2O2 visible light system was discussed. The XRD results showed that Fe was highly dispersed on the surface of TiO2 in the form of α-Fe2O3. The Fe/TiO2 catalyst with heterogeneous Fenton and visible light photocatalytic activity was successfully optimized, forbidden bandwidth of Fe/TiO2 after Fe supported was narrower, the scope of light absorption red-shifted, the electron-hole pairs were more generated, and there was a significant synergistic effect between the carrier TiO2 and the supported Fe, which exhibited good oxidation capacity for degradation of 10 mg L−1 atrazine in pH of 3, the concentration of H2O2 was 1.6 mM, and the catalyst was added at 1 g L−1, achieving over 95% removal efficiency within 30 min, and, in the range of pH 3–7, the degradation rate of the reaction for 30 min can be maintained above 75%, which greatly broadened the range of pH application and had good recycling performance. The degradation process conformed to the quasi-first-order kinetic model. Through LC-MS analyzed, 12 intermediate products were formed during the degradation of atrazine, the final products were all cyanuric acid, and then the triazine ring was mineralized into inorganic substances such as CO2, H2O and NO3− by oxidation of ·OH, and the possible degradation pathways were inferred.

ACS Style

Nan Yang; Yanping Liu; Jia Zhu; Zhongqiang Wang; Jinwei Li. Study on the efficacy and mechanism of Fe-TiO2 visible heterogeneous Fenton catalytic degradation of atrazine. Chemosphere 2020, 252, 126333 .

AMA Style

Nan Yang, Yanping Liu, Jia Zhu, Zhongqiang Wang, Jinwei Li. Study on the efficacy and mechanism of Fe-TiO2 visible heterogeneous Fenton catalytic degradation of atrazine. Chemosphere. 2020; 252 ():126333.

Chicago/Turabian Style

Nan Yang; Yanping Liu; Jia Zhu; Zhongqiang Wang; Jinwei Li. 2020. "Study on the efficacy and mechanism of Fe-TiO2 visible heterogeneous Fenton catalytic degradation of atrazine." Chemosphere 252, no. : 126333.

Journal article
Published: 24 January 2020 in Ecotoxicology and Environmental Safety
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An efficient MnCeOx composite was successfully synthesized for activation of persulfate to degrade acid orange 7 (AO7) and ofloxacin. Pollutants degradation efficiencies with different catalytic systems were investigated. Results showed the performance of MnCeOx was better than MnOx, CeO2 and MnOx + CeO2. Thus, there was a clear synergistic effect (Se) between Mn and Ce in the composite, and the Se was 73.8% for AO7 and 39.6% for ofloxacin. In addition, AO7 removal fitted 1st order reaction while ofloxacin removal fitted 2nd order reaction in MnCeOx/persulfate system. Moreover, MnCeOx/persulfate system showed high efficiency in pH range of 5–9. Mechanism analysis showed that SO4− and OH on the surface of the catalyst were the main active species, and O2− also played an important role in pollutants degradation. Furthermore, MnCeOx showed high activity in actual water. Finally, the possible degradation pathway of ofloxacin was proposed according to the high performance liquid chromatography-mass spectrometry result. Overall, this study provides an efficient and stable catalyst to activate persulfate to degrade refractory pollutants.

ACS Style

Lijun Niu; Guang Xian; Zeqing Long; Guangming Zhang; Jia Zhu; Jinwei Li. MnCeOX with high efficiency and stability for activating persulfate to degrade AO7 and ofloxacin. Ecotoxicology and Environmental Safety 2020, 191, 110228 .

AMA Style

Lijun Niu, Guang Xian, Zeqing Long, Guangming Zhang, Jia Zhu, Jinwei Li. MnCeOX with high efficiency and stability for activating persulfate to degrade AO7 and ofloxacin. Ecotoxicology and Environmental Safety. 2020; 191 ():110228.

Chicago/Turabian Style

Lijun Niu; Guang Xian; Zeqing Long; Guangming Zhang; Jia Zhu; Jinwei Li. 2020. "MnCeOX with high efficiency and stability for activating persulfate to degrade AO7 and ofloxacin." Ecotoxicology and Environmental Safety 191, no. : 110228.

Journal article
Published: 13 December 2019 in Bioresource Technology
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In order to explore the treatment efficiency of optoelectronic wastewater and pollutant degradation mechanism of full-scale two-stage AO process, 160 d monitoring was conducted in this study. The results showed that the two-stage AO process owned relatively stable nitrogen and organic matter removal performance. The average concentration of COD, NH4+-N, and TN in effluent was 54, 3.78 and 13.77 mg L−1, respectively, and the removal rate was over 80%. The results of high-throughput sequencing demonstrated that the dominant microorganism was Proteobacteria, Bacteroidetes, Firmicutes, Chlorofeli, and Acidobacteria, and differences of interaction networks exited between aerobic and anoxic units. Meanwhile, the microorganism metabolism in aerobic units was significantly different from that in anoxic unit, and the metabolism of the microbial community for treating optoelectronic wastewater was significantly different from that for treating urban domestic sewage.

ACS Style

Xiao Huang; Jia Zhu; Weiyan Duan; Jingsi Gao; Weijin Li. Biological nitrogen removal and metabolic characteristics in a full-scale two-staged anoxic-oxic (A/O) system to treat optoelectronic wastewater. Bioresource Technology 2019, 300, 122595 .

AMA Style

Xiao Huang, Jia Zhu, Weiyan Duan, Jingsi Gao, Weijin Li. Biological nitrogen removal and metabolic characteristics in a full-scale two-staged anoxic-oxic (A/O) system to treat optoelectronic wastewater. Bioresource Technology. 2019; 300 ():122595.

Chicago/Turabian Style

Xiao Huang; Jia Zhu; Weiyan Duan; Jingsi Gao; Weijin Li. 2019. "Biological nitrogen removal and metabolic characteristics in a full-scale two-staged anoxic-oxic (A/O) system to treat optoelectronic wastewater." Bioresource Technology 300, no. : 122595.

Journal article
Published: 06 December 2019 in Journal of Cleaner Production
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Conventional wastewater treatment processes produce large amounts of excess sludge that demand expensive treatment and disposal. This study proposes a new strategy of zero excess sludge wastewater treatment using photosynthetic bacteria with value-added substances generation and recovery. The strategy used photosynthetic bacteria to effectively purify wastewater and synthesized cells; then five value-added substances, coenzyme Q10, carotenoids and bacteriochlorophyll, 5-Aminolevulinic acid, and protein, were successively extracted from photosynthetic bacteria cells with >75% efficiency compared to the separated extraction of each substance, leaving the residual bacterial biomass to be used as fertilizer. Thus, zero excess sludge is achieved by wastewater treatment with nutrients recovery. Also, for the first time, all five value-added substances in photosynthetic bacteria cells were successfully recovered, which helps the economic balance sheet. This method presents a promising alternative for traditional wastewater treatment and shows a new approach of “zero excess sludge” in wastewater treatment, which is in line with the requirements of sustainable development and promotes the development of cleaner production.

ACS Style

Ran Zhi; Kefan Cao; Guangming Zhang; Jia Zhu; Guang Xian. Zero excess sludge wastewater treatment with value-added substances recovery using photosynthetic bacteria. Journal of Cleaner Production 2019, 250, 119581 .

AMA Style

Ran Zhi, Kefan Cao, Guangming Zhang, Jia Zhu, Guang Xian. Zero excess sludge wastewater treatment with value-added substances recovery using photosynthetic bacteria. Journal of Cleaner Production. 2019; 250 ():119581.

Chicago/Turabian Style

Ran Zhi; Kefan Cao; Guangming Zhang; Jia Zhu; Guang Xian. 2019. "Zero excess sludge wastewater treatment with value-added substances recovery using photosynthetic bacteria." Journal of Cleaner Production 250, no. : 119581.

Journal article
Published: 29 October 2018 in Sustainability
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Pseudanabaena sp. is a common and harmful species in freshwater cyanobacteria blooms. There are very few studies on its distribution characteristics and growth influencing factors. In the current study, it was found to be dominant in three cascading reservoirs in Southern China. Field observations and laboratory experiments were integrated to investigate the dominance and growth factors of Pseudanabaena sp. The effects of temperature, light intensity, nutrients, chemical oxygen demand (COD), pH, and disturbance on Pseudanabaena sp. growth were evaluated. The results indicated that Pseudanabaena sp. had significant positive correlations with water temperature, pH, and COD (p < 0.01) and a positive correlation with NH3-N (p < 0.05). The optimum growth temperature range for Pseudanabaena sp. was from 20 to 30 °C; hence, it usually has outbreaks in May and August. The optimum light intensity and pH for Pseudanabaena sp. were 27 μmol photons m−2s−1 and from 7 to 9, respectively. The superior tolerance for low light, disturbance, and phosphorus deficiency of Pseudanabaena sp. may be the main factors affecting its dominance in reservoirs. Controlling nitrogen was more effective than controlling phosphorus to avoid the risk that was brought by Pseudanabaena sp. This study contributed to the theoretical knowledge for the prediction and control of the growth of Pseudanabaena sp.

ACS Style

Jingsi Gao; Jia Zhu; Maowei Wang; Wenyi Dong. Dominance and Growth Factors of Pseudanabaena sp. in Drinking Water Source Reservoirs, Southern China. Sustainability 2018, 10, 3936 .

AMA Style

Jingsi Gao, Jia Zhu, Maowei Wang, Wenyi Dong. Dominance and Growth Factors of Pseudanabaena sp. in Drinking Water Source Reservoirs, Southern China. Sustainability. 2018; 10 (11):3936.

Chicago/Turabian Style

Jingsi Gao; Jia Zhu; Maowei Wang; Wenyi Dong. 2018. "Dominance and Growth Factors of Pseudanabaena sp. in Drinking Water Source Reservoirs, Southern China." Sustainability 10, no. 11: 3936.