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| 1 | Removal of heavy metals and arsenic from a co-contaminated soil by sieving combined with washing process显示文摘Batch experiments were conducted with a heavy metals and arsenic co-contaminated soil from an abandoned mine to evaluate the feasibility of a remediation technology that combines sieving with soil washing.Leaching of the arsenic and heavy metals from the different particle size fractions was found to decrease in the order:< 0.1,2–0.1,and > 2 mm.With increased contact time,the concentration of heavy metals in the leachate was significantly decreased for small particles,probably because of adsorption by the clay soil component.For the different particle sizes,the removal efficiencies for Pb and Cd were75%–87%,and 61%–77% for Zn and Cu,although the extent of removal was decreased for As and Cr at < 45%.The highest efficiency by washing for Pb,Cd,Zn,and As was from the soil particles > 2 mm,although good metal removal efficiencies were also achieved in the small particle size fractions.Through SEM-EDS observations and correlation analysis,the leaching regularity of the heavy metals and arsenic was found to be closely related to Fe,Mn,and Ca contents of the soil fractions.The remediation of heavy metal-contaminated soil by sieving combined with soil washing was proven to be efficient,and practical remediation parameters were also recommended. | Xiaoyong Liao You Li Xiulan Yan | 2016 | Journal of Environmental Sciences2016，28，3： | 19 |
| 2 | Arsenic retention and transport behavior in the presence of typical anionic and nonionic surfactants显示文摘The massive production and wide use of surfactants have resulted in a large amount of surfactant residuals being discharged into the environment,which could have an impact on arsenic behavior.In the present study,the influence of the anionic surfactant sodium dodecyl benzene sulfonate(SDBS) and nonionic surfactant polyethylene glycol octylphenyl ether(Triton X-100) on arsenic behavior was investigated in batch and column tests.The presence of SDBS and Triton X-100 reduced arsenic retention onto ferrihydrite(FH),enhanced arsenic transport through FH coated sand(FH-sand) columns and promoted arsenic release from the FH surface.With coexisting surfactants in solution,the equilibrium adsorbed amount of arsenic on FH decreased by up to 29.7% and the adsorption rate decreased by up to 52.3%.Pre-coating with surfactants caused a decrease in the adsorbed amount and adsorption rate of arsenic by up to 15.1% and 58.3%,respectively.Because of the adsorption attenuation caused by surfactants,breakthrough of As(Ⅴ) and As(Ⅲ) with SDBS in columns packed with FH-sand was 23.8% and 14.3%faster than that in those without SDBS,respectively.In columns packed with SDBS-coated FH-sand,transport of arsenic was enhanced to a greater extent.Breakthrough of As(Ⅴ) and As(Ⅲ) was 52.4% and 43.8% faster and the cumulative retention amount was 44.5% and 57.3% less than that in pure FH-sand column systems,respectively.Mobilization of arsenic by surfactants increased with the increase of the initial adsorbed amount of arsenic.The cumulative release amount of As(Ⅴ) and As(Ⅲ) from the packed column reached 10.8% and 36.0%,respectively. | Chuan Liang Xianliang Wang Xianjia Peng | 2016 | Journal of Environmental Sciences2016，28，1： | 2 |
| 3 | Screening of Sapindus germplasm resources in China based on agro-morphological traits显示文摘Sapindus L.species are widely cultivated for biodiesel,biomedical,and biochemical raw materials in southern China.However,yields fuctuate widely due to the lack of high-yielding,high-quality,stable cultivars.Therefore,the objectives of this study were to evaluate three species and one variety among 149 nationwide Sapindus species and screen for elite accessions which would serve as Sapindus breeding materials.Accessions were evaluated on 19 agro-morphological traits by correlation analysis and principal component analysis.These displayed substantial diversity and a broad range of economic traits.In particular,accessions of Sapindus mukorossi and Sapindus rarak had more variation in economic traits than Sapindus delavayi and Sapindus rarak var.velutinus.Increased saponin accumulation may be achieved at the cost of seed oil production.Thirty elite accessions for oil and saponin production,and for comprehensive utilization were screened and accessions no.80,110,and 112 had significant potential to produce high yields.These elite accessions will facilitate the identification of genetic determinants of valuable traits and the effective utilization of trait variability in Sapindus breeding. | Jiming Liu Shiqi Liu Yuanyuan Xu Caowen Sun Zhong Chen Xin Wang Lixian Wang Shilun Gao Guochun Zhao Qiuyang He Xuehuang Weng Liming Jia | 2022 | Journal of Forestry Research2022，33，1： | 1 |
| 4 | 污染土壤中重金属的化学提取技术及其实际应用综述显示文摘化学提取法是重金属污染土壤的主要修复方法之一,本文重点综述了几类常用的化学提取剂,介绍它们在实验室的研究以及实际的工业应用。可提取态重金属对化学提取的效率有着重要影响,修复后的土壤也需要进行合理的评价,因此本文对可提取态重金属的研究以及修复效果评价的方法也进行了综述。 | 彭昌盛 臧小龙 袁合涛 谷庆宝 | 2016 | 环保科技2016，22，1： | 0 |
| 5 | 一种丁香酚表面活性剂的合成及纳米微球的制备显示文摘以丁香酚为原料,采用甲酯化、醚化和皂化反应成功合成了一种丁香酚基羧酸盐表面活性剂(Eu-10),并通过表面张力法和荧光探针法研究了其表面活性。在室温下,Eu-10的临界胶束浓度(cmc)为3.98 mmol/L。Eu-10内含有可聚合的不饱和双键。以Eu-10为乳化剂和共聚单体,采用乳液聚合法成功制备了苯乙烯和Eu-10共聚的纳米微球。利用扫描电镜和透射电镜等技术对样品的结构和形貌进行了表征。结果表明,由于Eu-10具有两亲性,得到的纳米微球具有核壳结构。考察了表面活性剂浓度、引发剂浓度和聚合温度对纳米微球的粒径影响。通过调节多种因素可以有效调节纳米微球的粒径。该体系充分利用了天然产物丁香酚的结构特征,拓展了天然产物在新材料制备方面的应用。 | 史丽燕 杨明珠 宋冰蕾 崔正刚 | 2020 | 日用化学工业2020，50，6： | 0 |
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